TORSIONAL COUPLINGS 07 22
01737 767493 info@jbj.co.uk www.jbj.co.uk - registered in England No: 1185469 - jbj Techniques Limited is ISO certificated, committed to international coordination & unification of industrial standards. A range of products ATEX certificated to directive 94/9/E requirements an excellence in engineering www.jbj.co.uk/couplings.html You Tube
CONTENTS Page Introduction...................................................................................................................................................................................................................................................................................................................................................................... 1 LF characteristics & benefits............................................................................................................................................................................................................................................................................................................. 2 LF torsional coupling system........................................................................................................................................................................................................................................................................................................... 3 - 4 LF torsional flexible elements......................................................................................................................................................................................................................................................................................................... 5 L-LOC spline shaft clamping feature................................................................................................................................................................................................................................................................................ 6 Coupling selection................................................................................................................................................................................................................................................................................................................................................ 7 LF torsional performance data.......................................................................................................................................................................................................................................................................................... 8 - 9 LF torsional technical selection data................................................................................................................................................................................................................................................................. 10 LF weights & mass moment of inertia ............................................................................................................................................................................................................................................................ 11 LF torsional dimensions.................................................................................................................................................................................................................................................................................................................. 12 - 15 LF torsional flywheel couplings ...................................................................................................................................................................................................................................................................................... 16 - 18 Damper couplings .......................................................................................................................................................................................................................................................................................................................................... 19 Model 6 & 6B floating shaft couplings ............................................................................................................................................................................................................................................................. 20 LF torsional model 6 & 6B dimensions ........................................................................................................................................................................................................................................................ 21 LF torsional model 6 & 6B............................................................................................................................................................................................................................................................................................................ 22 - 23 LF torsional assembly instructions ....................................................................................................................................................................................................................................................................... 24 - 25 Hytrel® assembly instructions .............................................................................................................................................................................................................................................................................................. 26 LK torsional coupling system............................................................................................................................................................................................................................................................................................... 27 - 28 LK system dimensions........................................................................................................................................................................................................................................................................................................................ 29 Pump mounting plates ......................................................................................................................................................................................................................................................................................................................... 30 - 31 Pump mounting housings ............................................................................................................................................................................................................................................................................................................ 32 LM torsional coupling system.............................................................................................................................................................................................................................................................................................. 33 - 34 LM torsional coupling design types ....................................................................................................................................................................................................................................................................... 35 LM torsional coupling selection...................................................................................................................................................................................................................................................................................... 36 LM technical data - natural rubber ............................................................................................................................................................................................................................................................................ 37 LM technical data - silicone (50 shore A) .................................................................................................................................................................................................................................................. 38 LM torsional coupling dimensions (standard types) .................................................................................................................................................................................................... 39 LM torsional coupling dimensions (special types for radial change of elements) ............................................................................... 40 LM coupling installation instructions ................................................................................................................................................................................................................................................................. 41 - 42 quality products for mechanical & fluid power The details contained within this catalogue are reproduced in accordance with the latest information at publication of this catalogue. Errors & Omissions Excepted Last update: 26/07/2022
1 TORSIONAL COUPLINGS INTRODUCTION System Torsional Vibratory Load Torsional Couplings Lovejoy Torsional Couplings solve torsional vibration problems typical of those found in diesel engine applications. The torsional coupling dampens torsional vibrations and tunes the system to have critical speeds outside the operating range. Our application engineers can analyze the application with our computer programme and determine the exact coupling needed for almost any application. The LF family is a rubber-in-compression coupling designed for a wide range of applications such as generators, pumps, compressors, front power take-off, etc. The largest size, the LF400, can transmit up to 5,000 Nm of torque. These are available in a range of shore hardness. The LF is one of the most versatile couplings available, it can be adapted to many configurations such as shaft-to-shaft, engine flywheel mounts, or floating shaft. It not only provides torsional protection but also absorbs shock loads and can tolerate misalignment. For direct-mounted, diesel-driven hydraulic pumps, the LF coupling in Hytrel® and a LK coupling are available. These are very stiff couplings designed to shift critical speeds well above the operating range. When the inertia of the driven (hydraulic pump or pumps) is small compared to that of the driver (the diesel engine), a stiff coupling such as the LF Hytrel® or LK is required. Hydraulic pump drives are a fast-growing segment of the market, particularly in smaller diesel engine drives. Applications include crawler tractors, manlifts, compactors, skid steer loaders, excavators and forklift trucks. Both the LF Hytrel® and the LK have many thousands of hours of successful service in a wide variety of applications around the world. Torsional couplings are designed primarily to fit standard installations such as those specified by SAE. jbj Techniques has design and application engineers with many years of experience to custom design a torsional coupling to fit special applications. We can solve torsional vibration problems. Also if necessary, our engineers can analyze coupling failures. For assistance please contact: jbj Techniques Limited technical office, telephone: 01737 767493 or email: info@jbj.co.uk LF Torsional Coupling System Overview The LF Torsional coupling system consists of six basic models or configurations. Each model is designed to satisfy user requirements in a particular area of application and is available in a wide range of torque sizes; 10 - 5000 Nm. Flexible elements of various materials and durometer hardness may be substituted for each other in each size without complicated and uneconomical changes in coupling hardware or design. No other coupling design has achieved this versatility and economy from common components. The LF Torsional coupling system has readily available solutions for user requirements of misalignment, installation environmental conditions; corrosives, temperature, etc., torsional vibration dampening, noise reduction, reliability, reaction force reduction and more. LF Torsional couplings recognize the three essential requirements that a coupling must fulfill: 1) Reliable transmission of power. 2) Quick and economical installation. 3) Protection of the coupled equipment from dangerous torsional vibrations, reaction forces and misalignment. Application engineering and experienced customer service support this line of LF Torsional couplings. Our application engineers routinely administer computer analysis of potential torsional problems in drive systems. The considerable advantages of the LF Torsional coupling, as well as the service offered by our application engineers has led to wide use of this coupling. The L-Loc spline-clamping hub described in more detail in this catalog virtually eliminates spline shaft wear and “fretting”. The LF Torsional coupling is one of the leading couplings in the field of hydrostatic drives in rugged off-road construction equipment. #DriveLineHarmony www.jbj.co.uk/torsional-couplings.html
2 Parallel Misalignment Angular Misalignment Torsional Misalignment Axial Misalignment Characteristics and benefits of LF Torsional Couplings The basic component of the LF Torsional coupling is the unique and highly versatile elastomeric element. This element can be easily mounted in a number of different ways according to the application, and without special design changes or complex hardware modifications. The element, which is available in different materials for optimium performance, is connected to a cylindrical hub with radial screws and then to a flanged hub by axial screws. This unique coupling design is remarkably simple, highly effective, and gives the LF Torsional coupling unmatched performance capabilities. Unique Features » Free end float (Type S). » Substantial shock, vibration and misalignment capabilities. » Fail-safe operation. » Coupling allows “blind” connection of equipment. » High-speed capabilities. » Economic design. » Application versatility. » Low weight, low moment of inertia. » Free from noise and electrically insulating. » No lubrication, maintenance free. » Oil, heat and corrosion resistant elements (Hytrel®, Zytel®). » Easy to disconnect driver and driven without moving equipment or coupling hubs. » Unique “air flow” design assists in keeping components cool during operation. » Short profile for tight engine housing, or shaft-to-shaft requirements. » Easily assembled, no special bands, tools or time consuming assembly procedures. » Professional application assistance and expertise worldwide. » Torque transmission does not exert harmful reaction loads on equipment. » Various element materials for variation in torsional stiffness and environmental resistance. TORSIONAL COUPLINGS LF CHARACTERISTICS & BENEFITS #DriveLineHarmony www.jbj.co.uk/torsional-couplings.html
3 Model 0 and 0/S The heart of the LF Torsional coupling is the flexible element. This model is easily mounted to the customer ’s application designs or customer provided shaft hubs. No bands, special tools or contoured element clamping flanges are necessary. This model allows the customer to make his own shaft hubs from readily available steel bar stock. Ideal for quick prototype testing, retrofit and high volume applications. Model 0/S permits the driver and driven equipment to be quickly “blind” assembled and al lows for free end float. Available in High-Temperature Rubber (HTR) 50, 60, shore hardness as standard. Other materials and shore hardness grades are available for certain sizes. Model 1 and 1/S Consists of the standard flexible element (Model 0) with simple steel cylindrical hub. This satisfies the application requirements for mounting directly to engine flywheels, pul leys, brake discs, friction clutches, universal joints and gears. The cylindrical hub is available in a range of bores inch, metric, spline (SAE, ANSI , DIN, JIS) and custom. Model 1/S is shown with the S-style axial screw (similar to a dowel) for quick blind assembly of the drive package. The same element combinations available in Model 1 are also available in the Model 1/S. Model 2 and 2/S Provides a complete shaft-to-shaft coupling in a range of sizes for all industrial power transmission applications. It is similar to Model 1 shown above except a flanged hub is added to make the shaft to shaft connect ion. Model 2/S allows the drive package to be “blind” connected. As with all S-style models, free axial end float of equipment shafts is accompl ished without harmful axial force. Model 3 and 3/S A Model 1 or 1/S with the addition of an engine flywheel mounting plate, becomes a Model 3 or 3/S. It is available in many standard SAE flywheel sizes ( see page 18) as well as bespoke sizes. Special mounting requirements are easily and economically accomplished. The standard cylindrical hub is available in a variety of SAE, ANSI , DIN and JIS spilne bores as well as straight bores. As with the previous models, various standard flexible element materials are available for specific torsional, misalignment and environmental requirements. TORSIONAL COUPLINGS LF TORSIONAL COUPLING SYSTEM LF Torsional Coupling System These are the six standard LF Torsional coupling models. The simple, unique design of the LF Torsional coupling permits this wide range of models, from common components, to meet each application requirement. From engine flywheel housing or the long corrosive span of a cooling tower, we have the optimum LF Torsional coupling model available for your application. #DriveLineHarmony www.jbj.co.uk/torsional-couplings.html
Model 4 Similar to Model 3/S, this model consists of a cylindrical hub for shaft mounting and a high performance Hytrel® element which is pilot-mounted to a cast alloy SAE flywheel adaptor plate machined to SAE J620 specifications. Model 4 features a thin coupling profile for tight engine housing/pump application requirements. This is a reliable solution for problems of torsional resonance and performance in hot, oily environments. Model 6, 6/S, 6B Floating shafts are available to customer specified assembly length, with special corrosion and heat resistant elements and materials. This model surpasses all other floating shaft designs in assembly, simplicity and reliability. Model 6/S accommodates free endplay without harmful axial reaction forces. Model 6B is a highly elastic floating shaft coupling with accurate, maintenance free centreing flanges for appl ications with long spans and high speed requirements. 6 6B 6/S 4 TORSIONAL COUPLINGS LF TORSIONAL COUPLING SYSTEM #DriveLineHarmony www.jbj.co.uk/torsional-couplings.html
5 The focus of any coupling is the flexible elements; the working component . This is the part that must effectively absorb the shock loads, misalignment forces, torsional vibrations and the abuse of environmental conditions. It must be reliable, economical and not harmful to the connected equipment. It is virtually impossible for one single element material or coupling configuration to satisfy all these user requirements. That is why there are different materials used for flexible elements. Optimum and reliable performance is the result of the unique LF Torsional coupling design which permits easy adaptation and assembly to any application. Rubber (HTR) LF Torsional rubber elements are temperature resistant and are made from natural rubber (HTR). Natural rubber (HTR) elements have an operating range of -40 degrees C to 90 degrees C. The rubber element is torsionally soft and is placed into compression during asembly. Rubber in compression can transmit up to 5 times more torque as compared to non-compressed rubber. The rubber LF Torsional elements effectively accomodate shock, misalignment and vibration and do not exert any harmful radial and axial forces on the connected equipment. Available in High-Temperature Rubber (HTR) 50, 60, shore hardness as standard. Other materials and shore hardness grades are available for certain sizes. Please contact jbj Techniques Limited technical office telephone: 01737 767493 or email: info@ jbj.co.uk for higher temperature requirements. ® Hytrel Elements (HY) LF Torsional elements are made of a Hytrel ® elastomer compound from DuPont ™. These elements are torsionally much stiffer than natural rubber, about 20 times more so, and were developed for use primarily in combustion engine/hydraulic pump applications. These applications usually require reliable coupling performance in hot, oily environments. Hytrel® elements have 20% greater torque capacity compared to rubber elements and operate efficiently in the temperature range of -50°C to 120°C. The Torsional coupling with the Hytrel ® element places the harmful vibration resonance frequency above the operating speed range of the power package. The unique element design also reduces harmful axial reactionary f or ces . ® Zytel Elements (X) This element is extremely rugged and made of DuPont’s ™ highly stressable Zytel ® elastomeric compound. Zytel ® has excellent resistance to most chemical attacks and corrosion. Operational temperature range is -40° to 150°C without derating. This element composition is torsionally about three times stiffer than the Hytrel ® elements. Maximum angular misalignment is 1°. Zytel ® (X) elements exhibit less than 1° wind up at nominal torque and zero backlash. With more torque carrying capacity, compared to Hytrel ®, this element is particularly suited for applications where heat, moisture, high torque/high speed and corrosion resistance are important factors in coupling selection. TORSIONAL COUPLINGS LF TORSIONAL FLEXIBLE ELEMENTS #DriveLineHarmony www.jbj.co.uk/torsional-couplings.html
L-Loc Spline Shaft Clamping Feature For years spline shaft profile distortion and fretting were a major problem for hydraulic pump manufacturers. Now Lovejoy offers a simple solution: L-Loc. It is well known that normal manufacturing tolerances between the spline shaft and its mating spline coupling hub create unavoidable play. This play permits minor movements between the components. Compounding this tolerance related movement is misalignment and the hammering forces during power transmission. Eventually spline profile distortion occurs even with shafts and hubs of high quality hardened steel. When spline distortion and wear occur a decrease in pump efficiency results and abnormal stresses are placed on seals, bearings and other ngine/pump components. Equipment operation may become sluggish; horsepower and fuel are wasted. Premature maintenance or even failure of the shaft or other components may result. It appeared that the only way to eliminate spline distortion and wear was to eliminate the backlash and clearance related to mating tolerances and assembly misalignment, however, this became expensive, time consuming and was for the most part unsuccessful. The solution is the L-Loc. The Torsional coupling with the L-Loc spline-clamping hub can dampen harmful torsional vibrations, compensate for assembly misalignments and dramatically inhibit spline profile distortion. This unique design is remarkably simple but effective. The design of L-Loc consists of a unique slot that is placed slightly above and parallel to the spline bore. Two set screws are fitted perpendicularly into this slot. As the set screws are torqued, the spline shaft is “wrapped” with a clamping force around it’s entire profile. The hub becomes firmly locked around the spline shaft and the set screws never touch the spline profile. No dents, no gouges, no burrs, no hammering on and off “shrink fits” occur. The hub and shaft are absolutely free from play; a single assembly. By loosening the set screw, the clamping force is removed. TORSIONAL COUPLINGS L-LOC SPLINE SHAFT CLAMPING FEATURE 6 L-Loc Benefits 1 ) Eliminates premature spline shaft maintenance or replacement 2 ) Reduces stress on equipment components 3 ) Quick assembly and removal 4 ) Maintains equipment efficiency 5 ) Reduces equipment noise #DriveLineHarmony www.jbj.co.uk/torsional-couplings.html
TORSIONAL COUPLINGS COUPLING SELECTION 7 Coupling Selection Worksheet for General Industrial Applications Customer Information: Date: ................................................. Name: ................................................................................................................... Company: .............................................................................................................................. Telephone: ................................................................ Fax: ................................................................ email: ............................................................................................. Anticipated order quantity/annual usage: .................................................. Brief description of appl ication/problem: ........................................................................ .................................................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................................................. Engine Information: Engine manufacturer: ........................................................................................................................................................................................... Model number: ................................................................................................................. Displacement: ........................................................................................................... Rated horsepower: ......................................................................................................... @ rated speed: ........................................................................................................ Operating speed or range: ........................................................................................... Idle speed: ................................................................................................................ Diesel Petrol Natural Gas Other (details: .................................................................................................. ) 2-stroke 4-stroke Number of cyl inders: Piston configuration: In-l ine Vee (angle: .............. ) SAE Flywheel size (J620D): ........................................................................... Please attach a drawing if non-standard Driven Equipment: Compressor Water Pump Hydraul ic Pump Generator/Alternator Other .................................................................. Shaft Ø or spl ine information: .............................................................................................................................................................................................................................. Equipment mounting: Flange-mounted to engine housing Independent of engine Driven from: Flwheel Front PTO Other (detai ls: .................................................................................................. ) Ambient operating temperature: ................ °C Mass moment of inertia (J or WR2): Engine: ............................................................................................................................. Flywheel: ................................................................................................................... Driven equipment: Sketch or notes (attach additional sheets if necessary): 1 . ............................................................................................ 2 . ............................... .................................................................... 3 . ............................................................................................ 4 . ............................... .................................................................... Torsional Coupling Selection for Internal Combustion Engine Applications When correctly sized and selected the torsional coupling will effectively dampen vibration and tune critical frequencies out of the operating range of systems driven by diesel, petrol or natural gas reciprocating engines. But to make sure the coupling will do it’s job as intended, the selection should be verified with a torsional analysis of the system. Misapplication of the coupling in an engine application frquently leads to coupling failure or system damage. Therefore contact the jbj Techniques Limited technical office, telephone: 01737 767493 or email: info@jbj.co.uk for assistance with coupling selection. We will ensure that the correct coupling size and stiffness is selected not only for proper nominal and maximum torque but also for the elusive factor of continuous vibratory torque which can otherwise melt or rupture an elastomeric coupling or damage other system components. Please copy and complete the information worksheet and fax it to jbj Techniques Limited technical office: 01737 772041 for selection. Alternatively fill in the on-line version found at www.jbj.co.uk/torsionalcouplingselection #DriveLineHarmony www.jbj.co.uk/torsional-couplings.html
TORSIONAL COUPLINGS LF TORSIONAL PERFORMANCE DATA 8 * HTR = High Temperature Rubber ** Angular and parallel misalignment values are dependent on speed, and for rubber elements, they should be adjusted according to figure two on page 10. Hytrel® elements are only for applications where the driven component is located to the driver for essentially perfect alignment i.e. hydraulic pump flange-mounted to engine flywheel housing. *** The “S-Style” design is not constrained axially and allows hubs to move apart without creating axial force on the connected equipment. Special length S-Style fastener sleeves can further increase the allowable end float. ^ For Hytrel®, dynamic torsional stiffness values are non-linear with respect to torque. Value given is for 100% of nominal torque Contact jbj Techniques Limited Technical Office, telephone: 01737 767493 or email: info@jbj.co.uk for stiffness at lower torques. CPLG Size *Element Material Nominal Torque TKN (Nm) Maximum Torque TKmax (Nm) Maximum Speed (RPM) nmax Allowable Continuous Vibratory TorqueTKW (Nm) Dynamic Torsional Stiffness CTdyn Rubber 60 Shore A (Standard) (Nm/rad) Rubber 50 Shore A (optional) (Nm/rad) ^Hytrel® (Nm/rad) Zytrel® (Nm/rad) LF1 HTR 10 25 10000 5 140 90 - - LF2 HTR 20 60 8000 10 290 180 - - ZYTEL 30 60 10000 n/a - - - 6230 LF4 HTR 50 125 7000 20 850 550 - - ZYTEL 60 120 8000 n/a - - - 1650 LF8 HTR 100 280 6500 40 1500 900 - - HYTREL 100 280 6500 n/a - - 23000 - ZYTEL 120 280 7000 n/a - - - 46820 LF12 HTR 140 360 6500 50 4400 2700 - - LF16 HTR 200 560 6000 80 3400 2000 - - HYTREL 200 560 5500 n/a - - 36000 - ZYTEL 240 560 6000 n/a - - - 74000 LF22 HTR 275 750 6000 100 9000 6100 - - LF25 HTR 315 875 5000 125 4500 2800 - - HYTREL 350 875 5000 n/a - - 120000 - ZYTEL 370 800 5000 n/a - - - 111600 LF28 HTR 420 1200 5000 150 12000 7500 - - LF30 HTR 500 1400 4000 200 7800 4800 - - HYTREL 500 1400 4000 n/a - - 88000 - ZYTEL 550 1400 4500 n/a - - - 134100 LF50 HTR 700 2100 4000 300 19000 12000 - - HYTREL 800 2000 4000 n/a - - 262000 - LF80 HTR 900 2100 4000 320 25000 16000 - - LF90 HTR 1100 3150 3600 450 16000 10500 - - LF140 HTR 1700 4900 3600 700 40000 26500 - - HYTREL 1600 4000 3600 n/a - - 440000 - LF250 HTR 3000 8750 3000 1250 67000 43000 - - LF400 HTR 5000 12500 2500 2000 120000 75000 - - #DriveLineHarmony www.jbj.co.uk/torsional-couplings.html
TORSIONAL COUPLINGS LF TORSIONAL PERFORMANCE DATA 9 Maximum Allowable Misalignment** Wind Up (Angle of Twist) Static Stiffness CPLG Size Angular (Degrees) '' Kw Parallel '' Kr (mm) Axial (End Flaot) Standard '' Ka (mm) Axial (End Float) S-Style*** (mm) @ NOM Torque (Degrees) @ MAX Torque (Degrees) Axial Ca (Nm) Radial Ca (Nm) Angular Cw (Nm/deg.) 3 1.5 +/-1 +4.5/-1 6 17 38 150 0.3 LF1 3 1.5 +/-1.5 +3/-1.5 6 17 22 150 0.3 LF2 1 0.1 +/-0.25 +3/-0.25 - - - - - 3 1.5 +/-1.5 +4/-1.5 5 12 75 500 2.4 LF4 1 0.1 +/-0.25 +4/-0.25 - - - - - 3 2.0 +/-2 +5/-2 5 14 75 500 3.6 LF8 0 0 +3/-2 - - - - - - 1 0.1 +/-0.25 +5/-0.25 - - - - - 2 2.0 +/-2 +5/-2 3 7.5 250 1000 9.0 LF12 3 2.0 +/-2.5 +5.5/-2.5 5 14 100 500 5.0 LF16 0 0 +3/-2 - - - - - - 1 0.1 +/-0.25 +5.5/-0.25 - - - - - 2 2.0 +/-2.5 +5.5/-2.5 3 7.5 500 1300 12.0 LF22 3 2.0 +/-2.5 +6.5/-2.5 5 14 140 600 7.0 LF25 0 0 +3/-2 - - - - - - 1 0.1 +/-0.25 +6.5/-0.25 - - - - - 2 2.0 +/-2.5 +6.6/-2.5 3 7.5 550 1400 17.0 LF28 3 2.0 +/-2.5 +6.5/-2.5 5 14 190 750 9.0 LF30 0 0 +3/-2 - - - - - - 1 0.1 +/-0.25 +6.5/-0.25 - - - - - 2 2.0 +/-2.5 +6.6/-2.5 3 7.5 650 2200 26.0 LF50 0 0 +3/-2 - - - - - - 2 1.5 +/-1.5 +6.5/-1.5 3 7.5 850 2900 34.0 LF80 3 2.0 +/-2.5 +8.5/-2.5 5 14 220 1000 17.0 LF90 2 2.0 +/-2.5 +8.5/-2.5 3 7.5 650 2300 38.0 LF140 0 0 +3/-2 - - - - - - 2 2.0 +/-2.5 +10/-2.5 3 7.5 1150 4100 68.0 LF250 2 2.0 +/-2.5 - 3 7.5 1300 6000 88.0 LF400 #DriveLineHarmony www.jbj.co.uk/torsional-couplings.html
TORSIONAL COUPLINGS LF TORSIONAL TECHNICAL SELECTION DATA Agitators 1.0 Kilns 1.5 Beaters 1.5 Laundry Washers Reversing 2.0 Blowers 1.0 - 1.25 Can Filling Machinery 1.0 Line Shafting 1.5 Car Dumpers 2.5 Lumber Machinery 2.0 Car Pullers 1.5 Machine Tools 1.5 - 2.0 Compressors (Screws) 1.0 - 1.25 Metal Forming Machines 1.5 - 2.5 Compressors (Reciprocating) contact jbj tech. office Mills, Rotary Type 2.0 Conveyors 1.0 - 1.25 Mixers 1.5 - 1.8 Live Roll, Shaker & Reciprocating 3.0 Paper Mill Equipment 1.2 - 2.0 Conveyors (Heavy duty) 1.25 - 2.5 Pumps:- Centrifugal 1.0 Cranes & Hoists 2.0 Crushers 3.0 Gear, Rotary or Vane 1.25 Dredgers 1.5 - 2.0 Reciprocating 1 Cylinder Single or Double Acting 2.0 Elevators 1.5 - 2.0 Evaporators 1.0 2 Cylinder Single Acting 2.0 Fans 1.0 - 1.5 2 Cylinder Double Acting 1.75 Feeders 1.0 3 or more Cylinders 1.5 Reciprocating 2.5 Rubber Machinery 2.0 - 2.5 Generators Stokers 1.0 Not Welding 1.0 Textile Machinery 1.2 Welding 2.0 Windlass 2.0 Hoist 1.5 Woodworking Machinery 1.0 Hammer Mills 2.0 10 Oils & Hydraulic Fluids Hytrel® Zytel® Solvents & Fuels Hytrel® Zytel® Acids & Bases Hytrel® Zytel® Miscellaneous Hytrel® Zytel® Automatic Transmissions A A Petrol A A Sulfuric Acid (20%) A C Ethylene Glycol* A A, B Fluid Type A & F A A Nujol, JP4 Kerosene A A Hydrochloric Acid (20%) B C Steam B B Hydraulic Fluid A A Halocarbons, Freon A A Hydroxide (20%) A B Liquid Ammonia A Phosphate Ester A A Trichlorethylene C C Lube Oil A A Carbon Tetrachloride B A Code: A = Little or no effect; B = Moderate effect; C = Severe effect. * Additives in anti-freeze may attack these elastomers severely. Chemical Resistance Chart Figure 1, Temperature Factor Figure 2, Permissible Misalignment vs. Speed Service Factor Guide #DriveLineHarmony www.jbj.co.uk/torsional-couplings.html
TORSIONAL COUPLINGS LF WEIGHTS & MASS MOMENT OF INERTIA 11 CLPG Size Weight (kg) Inertia (kg-cm2) Model 0 Model 1 Model 1/S Model 2 Model 2/S Model 0 Model 1 Model 1/S Model 2 Model 2/S LF1 0.06 0.21 0.24 0.47 0.49 0.35 0.75 0.86 1.60 1.70 LF2 0.15 0.46 0.49 1.06 1.09 1.25 2.50 3.30 7.30 8.10 LF4 0.21 1.31 0.70 2.31 1.70 3.30 5.00 6.50 11.30 12.80 LF8 0.32 1.35 1.44 3.45 3.54 7.00 15.00 18.60 41.00 44.60 LF12 0.35 1.45 1.56 3.55 3.66 8.40 18.20 20.00 44.20 46.10 LF16 0.65 2.28 2.33 6.16 6.21 23.40 42.50 49.10 118.80 125.40 LF22 0.70 2.52 2.62 6.42 6.62 26.60 50.40 70.20 126.50 146.30 LF25 0.84 3.59 3.77 9.31 9.49 50.20 90.70 102.70 215.00 227.00 LF28 0.95 3.79 4.05 9.51 9.76 55.60 102.40 113.20 247.80 258.50 LF30 1.43 5.66 6.02 15.21 15.57 102.00 200.00 220.40 545.50 565.90 LF50 1.60 6.04 6.50 15.60 16.05 104.00 205.00 253.40 550.50 598.90 LF80 2.10 6.85 7.25 16.60 17.00 131.80 240.30 263.90 585.50 609.10 LF90 3.30 11.55 12.23 28.67 29.35 450.00 657.5 759.20 1630.10 1731.80 LF140 3.65 12.33 13.22 29.45 30.36 572.00 770.00 873.00 1742.60 1845.60 LF250 7.10 18.98 20.01 44.42 45.44 1754.00 2404.00 2529.00 5264.00 5389.00 LF400 11.25 26.58 29.34 57.23 59.95 3380.00 4485.00 4683.00 9130.00 9329.00 CLPG Size Weight (kg) Inertia (kg-cm2) Model 1 Model 2 Model 4 Model 1 Model 2 Model 4 LF8 Hytrel® 1.30 3.10 - 76.90 181.00 - LF16 Hytrel® 2.30 4.80 - 206.60 512.00 - LF30 Hytrel® 5.20 13.30 6.50 800.70 2183.20 1759.40 (SAE 10) LF50 Hytrel® 5.60 13.70 7.00 942.3 2326.00 2310.8 (SAE 11.5) LF140 Hytrel® 12.00 29.00 14.50 3366.60 7257.70 - Weights & Mass Moment of Inertia for Couplings with Hytrel® Elements Weights & Mass Moment of Inertia for Couplings Zytel® Elements CLPG Size Weight (kg) Inertia (kg-cm2) Model 0/0S Model 1/1S Model 2/2S Model 0/0S Model 1/1S Model 2/2S LF2 Zytel® 0.1 0.4 1.0 1.23 1.81 6.61 LF4 Zytel® 0.1 1.3 2.3 2.63 3.63 9.95 LF8 Zytel® 0.3 1.5 3.5 10.50 14.60 40.70 LF16 Zytel® 0.5 2.1 5.9 27.50 36.60 113.00 LF25 Zytel® 0.7 3.6 9.1 50.30 72.30 196.40 LF30 Zytel® 1.1 5.4 14.9 122.00 177.90 523.50 SAE Size (J620) Weight (kg) Inertia (kg-cm2) Model 0/0S Model 0/0S 6.5 1.2 76 7.5 1.5 123 8.0 1.9 176 10.0 2.7 357 11.5 3.5 565 14.0 5.8 1724 Weights & Mass Moment for SAE Flywheel Adaptor Plates (5mm thick) To Obtain Weight of Model 3 1. Select weight of flywheel plate from table on the left. 2. Select weight of model 1 or 1/S coupling from table above. 3. Add flywheel plate and coupling weight together To Obtain Inertia of Model 3 1. Select inertia of flywheel plate from table on the left 2. Select inertia of model 1 or 1/S from table above 3. Add flywheel plate and coupling inertia together Weights & Mass Moment of Inertia for Couplings with Rubber (HTR) Elements #DriveLineHarmony www.jbj.co.uk/torsional-couplings.html
12 Model 0, Rubber Model 0, Hytrel® Model 0 & 0/S, Zytel® Coupling Size Element Material * Nominal Torque TKN(Nm) Maximum Torque TKmax(Nm) Max Speed (RPM) nmax Bore B1 Bore B2 A B C C1 D1 D2 Min Max Min Max LF1 HTR 10 25 10,000 8 19 8 25 24 2 7 7 56 56 LF2 HTR 20 60 8000 10 26 12 38 24 4 8 8 85 85 Zytel® 30 60 10,000 28 88 LF4 HTR 50 125 7000 12 30 15 45 25 4 8 8 100 100 Zytel® 60 120 8000 32 100 LF8 HTR 100 280 6500 12 38 18 55 34 4 10 10 120 120 Hytrel® 100 280 6500 30 125 Zytel® 120 280 7000 32 125 LF12 HTR 140 360 6500 12 38 18 55 42 4 10 10 122 120 LF16 HTR 200 560 6000 15 48 20 70 43 6 12 12 150 150 Hytrel® 200 560 5500 36 155 Zytel® 240 560 6000 42 155 LF22 HTR 275 750 6000 15 48 20 70 46 6 12 12 150 150 LF25 HTR 315 875 5000 15 55 20 85 47 6 14 14 170 170 Hytrel® 350 875 5000 40 182 Zytel® 370 800 5000 46 175 LF28 HTR 420 1200 5000 15 55 20 85 58 6 14 14 170 170 LF30 HTR 500 1400 4000 20 65 25 100 58 8 16 16 200 200 Hytrel® 500 1400 4000 50 205 Zytel® 550 1400 4500 58 205 LF50 HTR 700 2100 4000 20 65 25 100 58 8 16 16 200 200 Hytrel® 800 2000 4000 65 205 LF80 HTR 900 2100 4000 20 65 25 100 70 4 16 16 205 200 LF90 HTR 1100 3150 3600 30 85 30 110 70 8 20 20 260 260 LF140 HTR 1700 4900 3600 30 85 30 110 58 8 20 20 260 260 Hytrel® 1600 4000 3600 85 270 LF250 HTR 3000 8750 3000 40 105 40 130 105 8 20 20 340 340 LF400 HTR 5000 12500 2500 40 120 40 140 370 10 28 28 370 340 * HTR = High Temperature Natural Rubber Dimensions for Basic Models (mm) TORSIONAL COUPLINGS LF TORSIONAL DIMENSIONS #DriveLineHarmony www.jbj.co.uk/torsional-couplings.html
Coupling Size Element Material * E F H1 H2 L1/L2 L3 R S(+3/-2) T TK/Division TS LF1 HTR 22 26.0 30 36 24 50.0 11.0 - M6 44 2@180° 10 LF2 HTR 20 32.0 40 55 28 60.0 10.0 - M8 68 2@180° 14 Zytel® - 15 LF4 HTR 24 34.0 45 65 30 64.0 12.0 - M8 80 3@120° 14 Zytel® - 32.5 15 LF8 HTR 28 46.0 60 80 42 88.0 14.0 - M10 100 3@120° 17 Hytrel® - 48.0 20 - Zytel® - 45.0 - 19 LF12 HTR 28 46.0 60 80 42 88.0 14.0 - M10 100 4@90° 17 LF16 HTR 36 56.0 70 100 50 106.0 18.0 - M12 125 3@120° 19 Hytrel® - 58.0 26 - Zytel® - 53.0 - 22 LF22 HTR 36 56.0 70 100 50 106.0 18.0 - M12 125 4@90° 19 LF25 HTR 40 61.0 85 115 55 116.0 20.0 - M14 140 3@120° 22 Hytrel® - 62.0 27 - Zytel® - 58.0 - 25 LF28 HTR 40 61.0 85 115 55 116.0 20.0 - M14 140 4@90° 22 LF30 HTR 50 74.0 100 140 66 140.0 25.0 - M16 165 3@120° 25 Hytrel® - 76.0 35 - Zytel® - 71.0 - 30 LF50 HTR 50 74.0 100 140 66 140.0 25.0 - M16 165 4@90° 25 Hytrel® - 76.0 35 - LF80 HTR 61 75.5 100 140 66 141.5 30.5 - M16 165 4@90° 25 LF90 HTR 62 88.0 125 160 80 168.0 31.0 - M20 215 3@120° 32 LF140 HTR 62 88.0 125 160 80 168.0 31.0 - M20 215 4@90° 32 Hytrel® - 88.0 33 - LF250 HTR 77 108.0 160 195 100 208.0 22.5/54.5 - M20 280 4@90° 32 LF400 HTR 95 135.0 170 200 125 208.0 28.5/66.5 - M24 300 4@90° 45 * HTR = High Temperature Natural Rubber Dimensions for Basic Models (mm) 13 Model 1, Rubber Model 1, Hytrel® Model 1 & 1/S, Zytel® TORSIONAL COUPLINGS LF TORSIONAL DIMENSIONS #DriveLineHarmony www.jbj.co.uk/torsional-couplings.html
TORSIONAL COUPLINGS LF TORSIONAL DIMENSIONS 14 Model 1S, Rubber Model 2, Rubber Model 2/S, Rubber Dimensions for Basic Models (mm) Coupling Size Element Material * Nominal Torque TKN (Nm) Maximum Torque TKmax (Nm) Max Speed (RPM) n max Bore B1 Bore B2 A B C C1 D1 D2 Min Max Min Max LF1 HTR 10 25 10,000 8 19 8 25 24 2 7 7 56 56 LF2 HTR 20 60 8000 10 26 12 38 24 4 8 8 85 85 Zytel ® 30 60 10,000 88 LF4 HTR 50 125 7000 12 30 15 45 28 4 8 8 100 100 Zytel ® 60 120 8000 25 100 LF8 HTR 100 280 6500 12 38 18 55 32 4 10 10 120 120 Hytrel ® 100 280 6500 34 125 Zytel ® 120 280 7000 30 125 LF12 HTR 140 360 6500 12 38 18 55 32 4 10 10 122 120 LF16 HTR 200 560 6000 15 48 20 70 42 6 12 12 150 150 Hytrel ® 200 560 5500 43 155 Zytel ® 240 560 6000 36 155 LF22 HTR 275 750 6000 15 48 20 70 42 6 12 12 150 150 LF25 HTR 315 875 5000 15 55 20 85 46 6 14 14 170 170 Hytrel ® 350 875 5000 47 182 Zytel ® 370 800 5000 40 175 LF28 HTR 420 1200 5000 15 55 20 85 46 6 14 14 170 170 LF30 HTR 500 1400 4000 20 65 25 100 58 8 16 16 200 200 Hytrel ® 500 1400 4000 58 205 Zytel ® 550 1400 4500 50 205 LF50 HTR 700 2100 4000 20 65 25 100 58 8 16 16 200 200 Hytrel ® 800 2000 4000 58 205 LF80 HTR 900 2100 4000 20 65 25 100 65 4 16 16 205 200 LF90 HTR 1100 3150 3600 30 85 30 110 70 8 20 20 260 260 LF140 HTR 1700 4900 3600 30 85 30 110 70 8 20 20 260 260 Hytrel ® 1600 4000 3600 58 270 LF250 HTR 3000 8750 3000 40 105 40 130 85 8 20 20 340 340 LF400 HTR 5000 12500 2500 40 120 40 140 105 10 28 28 370 370 * HTR = High Temperature Natural Rubber #DriveLineHarmony www.jbj.co.uk/torsional-couplings.html
TORSIONAL COUPLINGS LF TORSIONAL DIMENSIONS Dimensions for Basic Models (mm) 15 Model 2, Hytrel® Model 2 &2/S, Zytel® Coupling Size Element Material * E F H1 H2 L1/L2 L3 R S(+3/-2) T TK/Division TS LF1 HTR 22 26.0 30 36 24 50.0 11 - M6 44 2@180° 10 LF2 HTR 20 32.0 40 55 28 60.0 10 - M8 68 2@180° 14 Zytel® - 15 LF4 HTR 24 34.0 45 65 30 64.0 12 - M8 80 3@120° 14 Zytel® - 32.5 15 LF8 HTR 28 46.0 60 80 42 88.0 14 - M10 100 3@120° 17 Hytrel® - 48.0 20 - Zytel® - 45.0 - 19 LF12 HTR 28 46.0 60 80 42 88.0 14 - M10 100 4@90° 17 LF16 HTR 36 56.0 70 100 50 106.0 18 - M12 125 3@120° 19 Hytrel® - 58.0 26 - Zytel® - 53.0 - 22 LF22 HTR 36 56.0 70 100 50 106.0 18 - M12 125 4@90° 19 LF25 HTR 40 61.0 85 115 55 116.0 20 - M14 140 3@120° 22 Hytrel® - 62.0 27 - Zytel® - 58.0 - 25 LF28 HTR 40 61.0 85 115 55 116.0 20 - M14 140 4@90° 22 LF30 HTR 50 74.0 100 140 66 140.0 25 - M16 165 3@120° 25 Hytrel® - 76.0 35 - Zytel® - 71.0 - 30 LF50 HTR 50 74.0 100 140 66 140.0 25 - M16 165 4@90° 25 Hytrel® - 76.0 35 - LF80 HTR 61 75.5 100 140 66 141.5 30.5 - M16 165 4@90° 25 LF90 HTR 62 88.0 125 160 80 168.0 31.0 - M20 215 3@120° 32 LF140 HTR 62 88.0 125 160 80 168.0 31.0 - M20 215 4@90° 32 Hytrel® - 88.0 33 - LF250 HTR 77 108.0 160 195 100 208.0 22.5/54.5 - M20 280 4@90° 32 LF400 HTR 95 135.0 170 200 125 208.0 28.5/66.5 - M24 300 4@90° 45 * HTR = High Temperature Natural Rubber #DriveLineHarmony www.jbj.co.uk/torsional-couplings.html
TORSIONAL COUPLINGS LF TORSIONAL FLYWHEEL COUPLINGS 16 Model 3, Rubber Model 3/S, Rubber Coupling Size Element Material * Nominal Torque TKN(Nm) Maximum Torque TKmax(Nm) Max Speed (RPM) nmax Bore B1 A B C D1 Min Max LF1 HTR 10 25 10,000 8 19 24 2 7 56 LF2 HTR 20 60 8000 10 26 24 4 8 85 Zytel® 30 60 10,000 88 LF4 HTR 50 125 7000 12 30 28 4 8 100 Zytel® 60 120 8000 25 100 LF8 HTR 100 280 6500 12 38 32 4 10 120 Hytrel® 100 280 6500 34 125 Zytel® 120 280 7000 30 125 LF12 HTR 140 360 6500 12 38 32 4 10 122 LF16 HTR 200 560 6000 15 48 42 6 12 150 Hytrel® 200 560 5500 43 155 Zytel® 240 560 6000 36 155 LF22 HTR 275 750 6000 15 48 42 6 12 150 LF25 HTR 315 875 5000 15 55 46 6 14 170 Hytrel® 350 875 5000 47 182 Zytel® 370 800 5000 40 175 LF28 HTR 420 1200 5000 15 55 46 6 14 170 LF30 HTR 500 1400 4000 20 65 58 8 16 200 Hytrel® 500 1400 4000 58 205 Zytel® 550 1400 4500 50 205 LF50 HTR 700 2100 4000 20 65 58 8 16 200 Hytrel® 800 2000 4000 58 205 LF80 HTR 900 2100 4000 20 65 65 4 16 205 LF90 HTR 1100 3150 3600 30 85 70 8 20 260 LF140 HTR 1700 4900 3600 30 85 70 8 20 260 Hytrel® 1600 4000 3600 58 270 LF250 HTR 3000 8750 3000 40 105 85 8 20 340 LF400 HTR 5000 12500 2500 40 120 105 10 28 370 * HTR = High Temperature Natural Rubber Flywheel Couplings Model 3, 3/S and 4 Dimensions (mm) #DriveLineHarmony www.jbj.co.uk/torsional-couplings.html
TORSIONAL COUPLINGS LF TORSIONAL FLYWHEEL COUPLINGS 17 Coupling Size Element Material * F H1 L1 L4 R S(+3/-2) T TS U(+3/-2) W LF1 HTR 26.0 30 24 - 11 - M6 10 - - LF2 HTR 32.0 40 28 - 10 - M8 14 - - Zytel® - 15 - LF4 HTR 34.0 45 30 - 12 - M8 14 - - Zytel® 32.5 - 15 - LF8 HTR 46.0 60 42 - 14 - M10 17 - 5 Hytrel® 48.0 - 20 - - Zytel® 45.0 - - 19 - LF12 HTR 46.0 60 42 - 14 - M10 17 - 5 LF16 HTR 56.0 70 50 - 18 - M12 19 - 5 Hytrel® 58.0 - 26 - - Zytel® 53.0 - - 22 - LF22 HTR 56.0 70 50 - 18 - M12 19 - 5 LF25 HTR 61.0 85 55 - 20 - M14 22 - 5 Hytrel® 62.0 - 27 - - Zytel® 58.0 - - 25 - LF28 HTR 61.0 85 55 - 20 - M14 22 44.0 5 LF30 HTR 74.0 100 66 11 25 - M16 25 - 5 Hytrel® 76.0 - 35 - - Zytel® 71.0 - - 30 30.0 LF50 HTR 74.0 100 66 22 25 - M16 25 - 5 Hytrel® 76.0 - 35 - - LF80 HTR 75.5 100 66 - 30.5 - M16 25 - 5 LF90 HTR 88.0 125 80 - 31.0 - M20 32 31.5 5 LF140 HTR 88.0 125 80 10.5 31.0 - M20 32 - 5 Hytrel® 88.0 - 33 - - LF250 HTR 108.0 160 100 - 22.5/54.5 - M20 32 - 13/19 LF400 HTR 135.0 170 125 - 28.5/66.5 - M24 45 - 19 * HTR = High Temperature Natural Rubber Model 3, Hytrel® Model 3 and 3/S, Zytel® Model 4, Hytrel® Flywheel Couplings Model 3, 3/S and 4 Dimensions (mm) #DriveLineHarmony www.jbj.co.uk/torsional-couplings.html
18 SAE Flywheel Size DA DT Through Holes Suggested Coupling Sizes for SAE Flywheel Sizes No NOM Ø HTR Model 3 & 3S Hytrel® Model 3 Hytrel® Model 4 Zytel® Model 3 6 - 1/2 215.9 200.02 6 9 8, 16 8, 16 N/A 8, 16 7 - 1/2 241.3 222.25 8 9 8, 16 8, 16 N/A 8, 16 8 263.52 244.47 6 11 16, 25 16, 30 30 16, 25, 30 10 314.32 295.27 8 11 25, 30 30, 50 30 25, 30 50, 90 140 11 - 1/2 352.42 333.37 8 11 30, 50 50, 140 50 30 90, 140 250 110 250 140 14 466.72 438.15 8 13 90, 140 140 N/A N/A 250 250 16 517.5 488.95 8 13 250 250 N/A N/A SAE J620 Flywheel Dimensions for Model 3, 3S and 4 TORSIONAL COUPLINGS LF TORSIONAL FLYWHEEL COUPLINGS #DriveLineHarmony www.jbj.co.uk/torsional-couplings.html
19 Damper Couplings The damper coupling (sometimes referrred to as the intermediate coupling) is used with U-joint and Cardan shafts to eliminate torsional vibrations from the diesel engine being transmitted to the driven equipment. The damper coupling assures that the drive systems are free of dangerous resonance speeds in the operating speed range and eliminates damage to gears, bearings, seals and spline fretting the driven equipment. Contact jbj Techniques Limited technical office, telephone: 01737 767493 or email: info@jbj.co.uk , for assistance in applying a damper coupling. TORSIONAL COUPLINGS DAMPER COUPLINGS #DriveLineHarmony www.jbj.co.uk/torsional-couplings.html
TORSIONAL COUPLINGS MODEL 6 & 6B FLOATING SHAFT COUPLINGS 20 LF Torsional Model 6 & 6B Floating Shaft Couplings Model 6, 6/S (Rubber Elements) This model compensates for considerable axial, radial and angular misalignment. With the rubber flexible elements it is torsionally very soft. Lengths are not standardised but made according to customer requirements. S-style axial mounting screws allow the hubs to have free end float without exerting axial loads on the connected equipment while providing quick assembly. Model 6, 6/S (Zytel® Elements) Elements made of super tough, corrosion resistant Zytel ® from DuPont™ are torsionally stiff without backlash with less than 1° windup. Large spans, equal to all-metal couplings, can be accommodated without internal support bearings when lightweight Zytel® flexible elements are used. Hubs, hardware and tubes are also available in stainless steel or with plating and corrosion resistant coatings. S-style, axial mounting screws al low for free end-float without harmful react ion forces. Model 6B (Rubber Elements) Similar to Model 6 except the centre shaft is supported by internal maintenance-free bearing material. This allows for greater equipment seperation and high speeds. The Model 3, 6/S Rubber drawing illustrates one of the many special designs available. In this case a standard flywheel adaptor plate (see Model 3) is used to couple to a diesel engine flywhee l . The flanged hub on the other end is supplied with extra long Sstyle connecting screws. Note that the element is reversed from it’s normal direction. This arrangement permits extensive axial movement and free end float, of the drive package. One of the many features of the Model 6 is that the centre floating shaft can be radially removed without displacing the coupled machines. Flexible elements may be pre-assembled to the centre segment and then final assembled to the hubs quickly without any special tools. Model 6, Zytel® Model 6B, Rubber Model 3, 6/S Rubber Model 6, Rubber #DriveLineHarmony www.jbj.co.uk/torsional-couplings.html
TORSIONAL COUPLINGS LF TORSIONAL MODEL 6 & 6B DIMENSIONS 21 Model 6 & 6B Dimensions (mm) Coupling Size Element Material* Nominal Torque (Nm) Maximum Torque (Nm) Bore Ø, B2 A BT C1 D1 D2 L2 Span L T TD TK/Division Y Min Max LF1 HTR 10 25 8 25 24 5 7 56 56 24 ** M6 30 44 2@180° 13 LF2 HTR 20 60 12 38 24 5 8 85 85 28 ** M8 40 68 2@180° 14 Zytel® 30 60 24 88 LF4 HTR 50 125 15 45 28 5 8 100 100 30 ** M8 45 80 3@120° 16 Zytel® 60 120 25 100 LF8 HTR 100 280 18 55 32 5 10 120 120 42 ** M10 60 100 3@120° 18 Zytel® 120 280 30 125 LF12 HTR 140 360 18 55 32 5 10 122 120 42 ** M10 60 100 4@90° 18 LF16 HTR 200 560 20 70 42 5 12 150 150 50 ** M12 70 125 3@120° 24 Zytel® 240 560 36 155 LF22 HTR 275 750 20 70 42 5 12 150 150 50 ** M12 70 125 4@90° 24 LF25 HTR 315 875 20 85 46 5 14 170 170 55 ** M14 85 140 3@120° 26 Zytel® 370 800 40 175 LF28 HTR 420 1200 20 85 46 5 14 170 170 55 ** M14 85 140 4@90° 26 LF30 HTR 500 1400 25 100 58 5 16 200 200 66 ** M16 100 165 3@120° 33 Zytel® 550 1400 50 205 LF50 HTR 700 2100 25 100 58 5 16 200 200 66 ** M16 100 165 4@90° 33 LF80 HTR 900 2100 25 100 65 5 16 205 200 66 ** M16 100 165 4@90° 34.5 LF90 HTR 1100 3150 30 110 70 5 19 260 260 80 ** M20 125 215 3@120° 39 LF140 HTR 1700 4900 30 110 70 5 19 260 260 80 ** M20 125 215 4@90° 39 LF250 HTR 3000 8750 40 130 85 10 19 340 340 100 ** M20 160 280 4@90° 46 LF400 HTR 5000 12500 40 140 105 10 25 370 370 125 ** M24 170 300 4@90° 57 ** Please specify distance between shaft ends L. Refer to table below for maximum and minimum values. * HTR = High Temperature Natural Rubber Model 6 & 6B Maximum Speed and Length Data Coupling Size Maximum Speed (RPM) (Short spans only) Minimum Span L (mm) (All versions) Maximum Span L (mm) @ 1750 RPM Model 6 Model 6B Zytel® Model 6 Model 6 Model 6B Zytel®Model 6 LF1 1500 6000 - 79 1140 1320 - LF2 1500 6000 10,000 79 1320 1475 1475 LF4 2900 6000 8000 92 1500 1575 1575 LF8 2900 6000 7000 106 1625 1830 1830 LF12 2900 6000 - 106 1625 1830 - LF16 2900 6000 6000 138 1650 1955 1955 LF22 2900 6000 - 138 1650 1955 - LF25 2900 5000 5000 152 1475 2130 2130 LF28 2900 5000 - 152 1475 2130 - LF30 2500 4000 4500 190 1500 2310 2310 LF50 2500 4000 - 190 2100 2310 - LF80 2500 4000 - 190 2100 2310 - LF90 1500 3600 - 230 865 2510 - LF140 1500 3600 - 230 1855 2510 - LF250 1500 3000 - 274 2185 2970 - LF400 1500 2500 - Contact jbj Technical Office, tel: 01737 767493 or email: info@jbj.co.uk #DriveLineHarmony www.jbj.co.uk/torsional-couplings.html
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