FLENDER COUPLINGS INTRODUCTION 09 20
Flender Mechanical Power Transmission Couplings available from jbj Techniques ii www.jbj.co.uk/couplings.html #DriveLineHarmony Flexible Flender couplings have a wide range of possible applications. A broad standard modular system as well as N-EUPEX , RUPEX and N-BIPEX ® ® ® Flexible Couplings specially designed application specific couplings are available. N-EUPEX cam couplings Rated torque: 19 Nm … 62,000 Nm RUPEX pin-and-bush couplings Rated torque: 200 Nm … 1,300,000 Nm N-BIPEX cam couplings Rated torque: 12 Nm … 4,650 Nm ELPEX , ELPEX-B and ELPEX-S ® ® ® Highly Flexible Couplings ® ELPEX couplings are free of circumferential back-lash. Their damping capacity and low torsional stiff-ness make them especially well-suited for coupling machines with strongly non-uniform torque characteristics or large shaft misalignment. ELPEX elastic ring couplings Rated torque: 1,600 Nm … 90,000 Nm ELPEX-B elastic tire couplings Rated torque: 24 Nm … 14,500 Nm ELPEX-S rubber disk couplings Rated torque: 330 Nm … 63,000 Nm ZAPEX gear couplings and ARPEX all-steel couplings ® ® Their purposes of application vary according to specific requirements with respect to shaft misalignment, temperature and torque. Torsionally Rigid Couplings For transmission of high torques, we offer both ARPEX all-steel disc couplings and ZAPEX gear couplings in a range of versions. ZAPEX gear couplings Rated torque: 1,300 Nm … 7,200,000 Nm ARPEX high performance disc couplings Rated torque: 1,000 Nm … 588,500 Nm N-ARPEX and ARPEX all-steel disc couplings Rated torque: 92 Nm … 2,000,000 Nm The vibration-damping, electrically insulating plug-in BIPEX-S elastomer couplings and SIPEX metal bellows couplings with very high torsional stiffness deliver especially isogonal torque transmission. BIPEX-S and SIPEX ® ® Backlash-Free Couplings BIPEX-S and SIPEX Rated torque: 0.1 Nm … 5,000 Nm
iii www.jbj.co.uk/couplings.html#flender #DriveLineHarmony Cylindrical shaft ends, extract from DIN 748 Part 1 (long) & Central holes according to DIN 332 Part 2. . . . . . . . . . . . 12 FLENDER Couplings Introduction Page Shaft coupling types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Shaft misalignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Balancing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 4 Shaft hub connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Key to symbols & selection of coupling series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Typical coupling solutions for different applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Selection of coupling size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 9 Checking shaft hub connection & environmental conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Fitting recommendations including DIN ISO 286 details. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Standards & formula symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Parallel key connections to DIN 6885-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 - 14 Coupling preselection & options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Adverse conditions and ATEX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 - 19 Railway couplings introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 - 21 jbj Techniques Limited introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 - 25 Contents FLENDER Couplings The details contained within this catalogue are reproduced with kind permission of FLENDER in accordance with the latest information available at time of production of this publication ................ E & OE. ® FLUDEX couplings are hydrodynamic fluid couplings which operate on the Fottinger principle. ® FLUDEX couplings limit starting and maximum torque in the drive train and, through the property of rotational slip, serve as an aid to starting the motor, as overload protection in the event of fault and for isolating torsional vibration. ® To compensate for shaft misalignment, the FLUDEX coupling is combined ® with a displacement coupling e.g. of the N-EUPEX type. #FLUDEX
Get to know the industry benchmark in couplings and reach out to , Mat Jackson Product Manager Couplings at Flender UK, and , Managing Director at JBJ Mike Davis for further queries. Learnmore about our couplings range here: https://lnkd.in/dAir-av #flender #couplings #neupex #newpartnership #cooperation #WeMoveTheWorld New distribution partnership in the UK: We have now partnered with jbj Techniques Limited as the official partner for our whole couplings range in the United Kingdom and kicked off our cooperation by a digital signing of the partnership contract. JBJ has a wealth of experience in established and niche applications, such examples are: Mechanical drives for subsea wave energy, steel works crucible handling equipment or marine winch drives. We are happy to have them on our side for our UK coupling customers, especially for the supply of the recently optimizedN-EUPEX! FLENDER Flender 9,544 followers 1w • 10 February 2021 Mechanical Power Transmission Couplings iv #DriveLineHarmony https://lnkd.in/eArCCRi www.jbj.co.uk/couplings.html#flender
• Interruption or limitation of torque. Couplings are frequently chosen after the machines to be connected have already been selected. Thanks to a large number of different coupling assembly options, specified marginal conditions for clearance and connection geometry can be met from the standard range. The coupling also performs secondary functions, e.g. providing a brake disk or brake drum for operating or blocking brakes, devices to record speed or the attachment of sprockets or pulleys. Torsionally flexible couplings have resilient elements usually manufactured from elastomer materials. Using an elastomer material with a suitable ShoreA hardness provides the most advantageous torsional stiffness and damping for the application. Shaft misalignment causes the resilient elements to deform. Highly flexible couplings have large-volume (elastomer) resilient elements of low stiffness. The angle of rotation and torque are conducted through the coupling with a considerable phase shift. Clutches interrupt or limit the transmissible torque. The engaging and disengaging forces on externally operated clutches are introduced via a mechanically, electrically, hydraulically or pneumatically operatingmechanism. Overload, centrifugal or freewheel clutches draw their engaging energy from the transmitted output. Torsionally rigid couplings are designed to be rigid in a peripheral direction and flexible in radial and axial directions. The angle of rotation and torque are conducted through the coupling without a phase shift. • Compensation for shaft misalignment with low restorative forces. Rigid couplings, designed as clamp, flanged or mechanism couplings, connect machines which must not undergo any shaft misalignment. Hydrodynamic couplings, often also called fluid or Fottinger couplings, are used as starting couplings in drives with high mass moments of inertia of the driven machine. In drive technology very often flexible, positive couplings, which may be designed to be torsionally rigid, torsionally flexible or highly flexible, are used. • Control of characteristic angular vibration frequency and damping. The mechanical drive train comprises individual units such as motor, gear unit and driven machine. The coupling connects these component assemblies. As well as the transmission of rotary motion and torque, other requirements may bemade of the coupling. • Noise insulation, electrical insulation. Couplings are divided into twomain groups, couplings and clutches. SHAFT COUPLINGS COUPLINGS CLUTCHES Externally Operated Clutches Torque Controlled Safety Couplings Speed Controlled Centrifugal Clutches Rotation Direction Controlled Freewheel Clutches Overrunning Clutches Rigid Clamp Couplings Flanged Couplings Mechanism Couplings Flexible Friction Hydrodynamic Couplings Magnetic Couplings Friction Couplings Positive Torsionally Rigid Gear Couplings All Steel Membrane Couplings Universal Joint Couplings Parallel Crank Couplings Torsionally Flexible Steel Spring Couplings Pin and Bush Couplings Pin Couplings Rubber Element Couplings Highly Flexible Rubber Tyre Couplings Rubber Disc Couplings Rubber Spacer Ring Couplings 1 #DriveLineHarmony Shaft Coupling Types Mechanical Power Transmission Couplings www.jbj.co.uk/couplings.html#flender
www.jbj.co.uk/couplings.html#flender 2 #DriveLineHarmony Technical Information Mechanical Power Transmission Couplings Axial misalignment Radial misalignment Angular misalignment Ka Kr Kw Shaft misalignment Couplings can be categorized into one of the following groups: Single-joint couplings Example: Couplings with flexible elements mainly made of elastomer materials. Shaft misalignment results in deformation of the elastomer elements. The elastomer elements can absorb shaft misalignment as deformations in an axial, radial and angular direction. The degree of permissible misalignment depends on the coupling size, the speed and the type of elastomer element. Single-joint couplings do not require an adapter and are therefore short versions. Shaft misalignment is the result of displacement during assembly and operation and, where machines constructed with two radial bearings each are rigidly coupled, will cause high loads being placed on the bearings. Elastic deformation of base frame, foundation and machine housing will lead to shaft misalignment which cannot be prevented, even by precise alignment. Furthermore, because individual components of the drive train heat up differently during operation, heat expansion of the machine housings causes shaft misalignment. Poorly aligned drives are often the cause of seal, rolling bearing or coupling failure.Alignment should be carried out by specialist personnel in accordance with operating instructions. In the case of a RUPEXRWN 198 coupling with an outer diameter of 198mmand a speed of 1500 rpm, the permitted radial misalignment is ΔKr = 0.3mm. Two-joint couplings Two-joint couplings are always designed with an adapter. The two joint levels are able to absorb axial and angular misalignment. Radial misalignment occurs via the gap between the two joint levels and the angular displacement of the joint levels. The permitted angular misalignment per joint level is frequently about 0.5°. The permitted shaft misalignment of the coupling can be adjusted via the length of the adapter. If there are more than two joint levels, it is not possible to define the position of the coupling parts relative to the axis of rotation. (The less frequently used parallel-crank couplings are an exception). Example: N-ARPEXARN-6 NEN 217-6 with a shaft distance of 140mmwith a permitted radial misalignment of ΔKr = 2.2mm (angle per joint level 1.0°). Depending on the direction of the effective shaft misalignment a distinction is made between: Kr G_MD10_XX_00 01 4
www.jbj.co.uk/couplings.html#flender 3 #DriveLineHarmony Technical Information Mechanical Power Transmission Couplings Half parallel key standard Eccentricity of centre of gravity of coupling ecoupl Flender balancing quality Order code Full parallel key standard better than 16 μm special balancing on request Balancing Today it is usual for themotor rotor, as well as the gear unit and drivenmachine shaft, to be balanced in accordance with the half parallel key standard. The balancing standard normally applied today. Before balancing, a half parallel key is inserted in the shaft and another in the coupling hub. Alternatively, balancing can be carried out before cutting the keyway. The balanced parts must be marked with an "H". This marking can be dispensed with if it is absolutely clear which parallel key standard has been applied. Flender Balancing Standard Balancing standard in accordance with DIN ISO 21940-32 Besides the required balance quality, it is necessary to set standards which define how the mass of the parallel key is to be taken into consideration when balancing. In the past, motor rotors have frequently been balanced in accordance with the full parallel key standard. The "appropriate" balance condition of the coupling hub was described as "balancing with open keyway" or "balancing after keyseating". No parallel key standard e = 9550 • ― perm e ≤ e coupl perm The balancing quality level, together with the operating speed, results in the maximum permissible eccentricity of the center of gravity of the coupling or the coupling subassembly. In the Flender article number the balancing quality can be preset with the help of the order code. Additionally, also the balance quality level to DIN ISO21940 can be preset together with the operating speed belonging to it, which then be taken as priority. The parallel key is inserted in the shaft keyway, then balancing is carried out. The coupling hub must be balanced without parallel key after keyseating. Marking of shaft and hub with "F" (for "full"). Balancing of shaft and coupling hub after key seating, but without parallel key. Not used in practice. Marking of shaft and hub with "N" (for "no"). The length of the parallel key is determined by the shaft keyway. Coupling hubs may be designed considerably shorter than the shaft. Permitted eccentricity of center of gravity e in μm perm Balance quality levels The so-called quality level G to DIN ISO 21940 indicates a range of permitted residual imbalance from zero up to an upper limit. Applications can be grouped on the basis of similarity analysis. For many applications a coupling balance quality of G 16 is sufficient. On drives susceptible to vibration the balance quality should be G6.3. Only in special cases is a better balance quality required. To prevent imbalance forces caused by projecting parallel key factors when balancing in accordance with the half parallel key standard in the case of applications with high balancing quality requirements, grooved spacer rings can be fitted or stepped parallel keys used. Eccentricity of center of gravity of coupling e in μm coupl Balancing quality level G inmm/s Coupling speed n in rpm maximum100 μm standard balancing without specification maximum40 μm fine balancing W02 maximum16 μm micro-balancing W03 G n
www.jbj.co.uk/couplings.html#flender G 1 G 4 G 10 G 16 G 25 G 40 102 10 1 2 4 6 8 2 4 6 8 2 4 6 8 103 102 4 2 6 8 2 4 6 8 103 104 G 1.6 G 2.5 G 6.3 G_MD10_EN_00007a Eccentricity of center of gravity eperm. in µm Coupling speed in rpm On request Micro-balancing Fine balancing Standard balancing 4 #DriveLineHarmony Technical Information Mechanical Power Transmission Couplings Coupling standard balancing ν = DA ⋅ n/19100 fine balancing Long version with LG> 3 x DA ν ≤ 15m/s ν > 15m/s Peripheral speed ν inmm/s. Example: Coupling speed = 1450 rpm required balancing quality level G6.3 eperm= 9550 • G= 9550 • 6.3 μm n 1450 Thus, the required eccentricity of centre of gravity is 41.5 μm. The fine balancing with a maximum eccentricity of centre of gravity of 40 mm fulfills this requirement; therefore, the order codeW02 has to be specified when ordering. For many applications the following balancing quality recommendation applies: Short version with LG ≤ 3 x DA ν ≤ 30m/s ν > 30m/s » hub parts without finished bore are unbalanced. Coupling outer diameter DA inmm. Coupling length LG inmm. » For FLUDEX couplings special balancing standards specified in Section 13 apply. » the number of balancing levels (one- or two-level balancing) is specified by Flender. » couplings are balanced in subassemblies. » without special specification balancing is done in accordance with the half-parallel-key standard. Balancing in accordance with the full-parallel-key standardmust be specified in the order number. The following standards on balancingmust be observed: » ARPEX couplings in standard balancing quality are unbalanced. Thanks to steel components machined all over and precisely guided adapters the balancing quality of standard balancing is nearly always adhered to. Coupling speed n in rpm.
www.jbj.co.uk/couplings.html#flender The form stability of the shaft/hub connection can only be demonstrated when shaft dimensions and details of the connection are available. The coupling torques specified in the tables of power ratings of the coupling series do not apply to the shaft-hub connection unrestrictedly. Shaft-hub connections The bore and the shaft-hub connection of the coupling are determined by the design of the machine shaft. In the case of IEC standard motors, the shaft diameters and parallel key connections are specified in accordance with DIN EN 50347. For diesel motors, the flywheel connections are frequently specified in accordance with SAE J620d or DIN 6288. Besides the very widely used connection of shaft and hub with parallel keys to DIN 6885 and cylindrically bored hubs, couplings with Taper clamping bushes, clamping sets, shrink-fit connections and splines to DIN 5480 are common. In the case of the shaft-hub connection with parallel key, the coupling hub must be axially secured, e.g. with a set screw or end washer. The parallel key must be secured against axial displacement in themachine shaft. All Flender couplings with a finished bore and parallel keyway are designed with a set screw. Exceptions are some couplings of the FLUDEX series, in which end washers are used. During assembly, Taper clamping bushes are frictionally connected to themachine shaft. Standards Machines 2006/42/EGEC: Machinery Directive. 1999/92/EG: ATEXDirective – Operator – andATEXGuideline to Directive 1999/92/EC. 2014/34/EU: ATEXDirective –Manufacturer. DINEN 80079-36: Non-electrical equipment for use in potentially explosive atmospheres. API 671: Special Purpose Couplings for Petroleum, Chemical and Gas Industry Services. VDI Guideline 2240: Shaft couplings - Systematic subdivision according to their properties VDI Technical Group Engineering Design 1971. DIN 6885: Driver connections without taper action – parallel keys – keyways. Shaft-hub connections DIN 740: Flexible shaft couplings Part 1 and Part 2. ISO10441: Petroleum, petrochemical and natural gas industries – Flexible couplings for mechanical power transmission special purpose applications. DIN 6288: Reciprocating internal combustion engines. Dimensions and requirements for flywheels and flexible couplings. DIN ISO 21940: Requirements for the balancing quality of rigid rotors DIN ISO 21940-32 Mechanical vibrations; standard governing the type of parallel key during balancing of shafts and composite parts. API 610: Centrifugal Pumps for Petroleum, Chemical and Gas Industry Services. ISO13709: Centrifugal pumps for petroleum, petrochemical and natural gas industries. ASMEB17.1: Keys and key seats. Balancing Couplings DIN EN 50347: General-purpose three-phase induction motors with standard dimensions and output data BS 46-1:1958 Keys and keyways and taper pins specification. DINEN 1127: Explosive atmospheres, explosion prevention and protection. DINEN 50347: General-purpose three-phase inductionmotors having standard dimensions and outputs. SAE J620d: Flywheels for industrial engines ... 5 #DriveLineHarmony Technical Information Mechanical Power Transmission Couplings
www.jbj.co.uk/couplings.html#flender Radial misalignment ΔKr mm Radial misalignment of the coupling halves. Key to symbols Overload torque TOL Nm Very infrequently occurring maximum load, e.g. during short circuit or blocking conditions. Fatigue torque TW Nm Amplitude of the dynamic coupling load. Coupling overload torque TKOL Nm Torque which can very infrequently be transmitted as maximum torque by the coupling. Resonance factor VR Factor specifying the torque increase at resonance. Temperature Ta °C Ambient temperature of the coupling in operation. Torsional stiffness, dynamic CTdyn Nm/rad For calculating torsional vibration. Name Symbols Unit Explanation. Excitation frequency ferr Hz Excitation frequency of motor or driven machine. Moment of inertia J kgm2 Moment of inertia of coupling sides 1 and 2. Axial misalignment ΔKa mm Axial misalignment of the coupling halves. Service factor FB Factor expressing the real coupling load as a ratio of the nominal coupling load. Angular misalignment ΔKw ° Angular misalignment of the coupling halves. Temperature factor FT Factor taking into account the reduction in strength of flexible rubber materials at a higher temperature. Weight m kg Weight of the coupling. Rated power PN kW Rated output on the coupling, usually the output of the driven machine. Rated torque TN Nm Rated torque as nominal load on the coupling. Rated speed nN rpm Coupling speed. Frequency factor FF Factor expressing the frequency dependence of the fatigue torque load. Maximum coupling speed nKmax rpm Maximum permissible coupling speed. Maximum torque Tmax Nm More frequently occurring maximum load, e.g. during starting. Rated coupling torque TKN Nm Torque which can be transmitted as static torque by the coupling over the period of use. Maximum coupling torque TKmax Nm Torque which can be frequently transmitted (up to 25 times an hour) as maximum torque by the coupling. Fatigue coupling torque TKW Nm Torque amplitude which can be transmitted by the coupling as dynamic torque at a frequency of 10 Hz over the period of use. Damping coefficient Ψ psi Damping parameter. Selection of the Coupling Series The coupling series is frequently determined by the driven machine and the design of the drive train. Common selection criteria are listed below and assigned to coupling properties, which are used to select the coupling series. Additionally, the price of the coupling and availability are important criteria for determining the coupling series to be used. FLUDEX couplings are used to reduce starting and/or overload torques. During starting, the motor may, for example, run up within a very short time; because of the FLUDEX coupling, the drive train with the drivenmachinemay accelerate after a delay and without increased torque load. The FLUDEX coupling cannot compensate for shaft misalignment and is therefore designed in combination with a displacement coupling, a cardan shaft or a belt drive. The displacement couplingmay be selected in accordance with the criteria described below. The FLUDEX series operates positively and transmits the torque with the aid of a flowing oil or water filling. Torque Range Rated Coupling Torque TKN Speed Range Peripheral Speed v = DA • n /19100 max max Torsionally Rigid Torsionally Flexible Highly Flexible Operating Temperature Range Coupling Type N-ARPEX 350 ... 2000000 Nm 110 m/s ■ – – -50 ... +280 °C N-BIPEX 12 ... 4650 Nm 45 m/s – ■ – -50 ... +100 °C ZAPEX 850 ... 7200000 Nm 60 m/s ■ – – -20 ... +80 °C N-EUPEX 19 ... 62000 Nm 36 m/s – ■ – -50 ... +100 °C ELPEX-S 330 ... 63000 Nm 66 m/s – – ■ -40 ... +120 °C RUPEX 200 ... 1300000 Nm 60 m/s – ■ – -50 ... +100 °C ELPEX 1600 ... 90000 Nm 60 m/s – – ■ -40 ... +80 °C N-EUPEX DS 19 ... 21200 Nm 36 m/s – ■ – -30 ... +80 °C ARPEX 92 ... 2000000 Nm 100 m/s ■ – – -40 ... +280 °C ELPEX-B 24 ... 14500 Nm 35 m/s – – ■ -50 ... +70 °C 6 #DriveLineHarmony Technical Information Mechanical Power Transmission Couplings
www.jbj.co.uk/couplings.html#flender The specified application factors are recommendations; regulations, rules and practical experience take priority as assessment criteria. FLUDEX couplings aremostly mounted on the high-speed gear shaft. Typical coupling solutions for different example applications No application factor need be taken into account with FLUDEX couplings. In the case of highly flexible couplings of the ELPEX, ELPEX-S and ELPEX-B series, deviating application factors are stated in the product descriptions. Electricmotor without gear unit factor FB Fans with TN less than 75 Nm 1.5 Example applications Application Internal-combustion engine Fans 1.75 Centrifugal pumps 1.0 Piston pumps 1.5 Vacuumpumps 1.5 Fans with TN from75 to 750 Nm 1.75 Fans with TN larger than 750 Nm 1.75 Blowers 1.5 Frequency converters / generators 1.25 Reciprocating compressors 1.75 Screw-type compressors 1.5 without gear unit Generators 1.75 Pumps 1.5 Hydraulic pumps, excavators, constructionmachines 1.5 Agricultural machinery 1.75 Other Turbine gear units 1.5 Electricmotor with gear unit Chemical industry Extruders 1.5 Pumps - centrifugal pumps 1.0 Pumps - piston pumps 1.75 Pumps - plunger pumps 1.5 Reciprocating compressors 1.75 Compressors / screw-type compressors 1.5 Hydraulic motor - gear unit 1.25 Calenders 1.5 Drying drums 1.25 Crushers 1.5 Power generation and conversion compressors 1.75 Kneaders 1.75 Stirrers 1.25 Centrifuges 1.25 Cooling drums 1.25 Toasters 1.25 Compressed air, reciprocating Mixers 1.25 Example applications Application Air - Blowers 1.5 Ingot pushers 1.75 factor FB Compressed air, screw-type compressors 1.25 Air - Cooling tower fans 1.5 Air - Turbine blowers 1.5 Generators, converters 1.25 Welding generators 1.25 Metal production, iron and steel works Plate tilters 1.5 Slabbingmill 1.75 Coilingmachines 1.5 Rollers 1.75 Metal workingmachines Plate bendingmachines 1.5 Roller straighteningmachines 1.5 Shears 1.75 Plate straighteningmachines 1.5 Roller tables 1.75 Hammers 1.75 Planingmachines 1.75 hydraulic pumps 1.25 Machine tools: Main drives 1.5 Punches 1.5 Constructionmachines, traversing gears 1.5 Kneadingmachines 1.5 concretemixers 1.5 Woodworking - planingmachines 1.5 Shears 1.5 Productionmachines Constructionmachines, suction Presses, forging presses 1.75 Machine tools:Auxiliary drives 1.25 Grindingmachines 1.25 Constructionmachines, Printingmachines 1.25 Woodworking - barking drums 1.5 Food industry pumps 1.5 Mashers 1.5 Constructionmachines, Fillingmachines 1.25 Sugar cane production 1.5 factor FB Textilemachines - shredders 1.5 Textilemachines - printingmachines 1.5 Example applications Application Woodworking - reciprocating saws 1.5 Grindingmachines 1.5 Textilemachines - winders 1.5 Textilemachines - tanning vats 1.5 Textilemachines - looms 1.5 Packagingmachines 1.5 Brick mouldingmachines 1.75 Passenger transport - elevators 1.5 Passenger transport - escalators 1.5 Conveyor systems - bucket elevators 1.5 Conveyor systems - belt conveyors 1.5 Conveyor systems - endless-chain conveyors 1.5 Conveyor systems - hauling winches 1.5 Conveyor systems - circular conveyors 1.5 Transport and logistics Crane fly jib hoists 1.5 Mixers 1.5 Roller presses 1.75 Paper-makingmachines, all 1.5 conveyors 1.5 Pipemills 1.5 Drag lifts 1.5 Separators 1.5 Cellulose and paper Pugmills 1.75 Ball mills 1.75 Crane slewing gear 1.5 Conveyor systems - screw Pulper drives 1.5 Hoisting gear 1.5 Hammer mills 1.75 Crane traversing gear 1.5 Crushers 1.75 Conveyor systems - inclined hoists 1.5 Crane lifting gear 2.0 Crane traveling gear 1.5 Cable railways 1.5 Winches 1.5 Cement industry Rotary furnaces 1.5 Beater mills 1.75 7 #DriveLineHarmony Technical Information Mechanical Power Transmission Couplings
www.jbj.co.uk/couplings.html#flender Selection of the Coupling Size The torque load of the couplingmust be determined from the output of the drivenmachine and the coupling speed. Rated coupling load T = 9550 x P / n N N N (T in Nm; P in kW; n in rpm) N N N The rated coupling load obtained in this way must be multiplied by factors and compared with the rated coupling torque. An ideal but expensive method is to measure the torque characteristic on the coupling. For this, Flender offers special adapters fitted with torquemeasuring devices. The rated coupling torque T is the torque which can be transmitted by the coupling over an appropriate period of use if the load is applied to the coupling KN purely statically at room temperature. Application factors are to express the deviation of the real coupling load from the "ideal" load condition. Coupling Load inContinuousOperation The operating principles of the driving and driven machines are divided into categories and the application factor FB derived from these in accordance with DIN 3990-1. Application factor for N-EUPEX, N-EUPEX-DS, RUPEX, N-BIPEX, ELPEX-B, N-ARPEX,ARPEX, ZAPEX and FLUDEX Examples of torque characteristic of drivingmachines: » uniform: Electric motors with soft starting, steam turbines. » uniformwithmoderate shock loads: Electric motors without soft starting, hydraulic motors, gas and water turbines. » non uniform: Internal-combustion engines. Examples of torque characteristic in drivenmachines: » uniform: Generators, centrifugal pumps for light fluids. » uniformwithmoderate shock loads: Centrifugal pumps for viscous fluids, elevators, machine tool drives, centrifuges, extruders, blowers, crane drives. » non uniform: Excavators, kneaders, conveyor systems, presses, mills. » very rough: Crushers, excavators, shredders, iron/smeltingmachinery. Application factor FB Torque characteristic of the driving machine Torque characteristic of the driven machine Uniform Uniform Non Uniform Very Rough uniform 1.0 1.25 1.5 1.75 uniform with moderate shock loads 1.25 1.5 1.75 2.0 non uniform 1.5 1.75 2.0 2.5 8 #DriveLineHarmony Technical Information Mechanical Power Transmission Couplings Temperature Factor FT Temperature T on the Coupling a Elastomer Low Coupling under -30°C up up to up to up to up to up to up to up to Material Temperature °C -30°C to 50°C 60°C 70°C 80°C 90°C 100°C 110°C 120°C N-EUPEX NBR -30 – 1.0 1.0 1.0 1.0 – – – – 1) N-EUPEX NR -50 1.1 1.0 – – – – – – – N-EUPEX HNBR -10 – 1.0 1.0 1.0 1.0 1.25 1.25 – – N-EUPEX DS NBR -30 – 1.0 1.0 1.0 1.0 – – – – RUPEX NBR -30 – 1.0 1.0 1.0 1.0 – – – – RUPEX NR -50 1.1 1.0 – – – – – – – RUPEX HNBR -10 – 1.0 1.0 1.0 1.0 1.25 1.25 – – N-BIPEX TPU -50 1.0 1.0 1.0 1.0 1.0 1.0 1.0 – – ELPEX NR -40 1.1 1.0 1.25 1.40 1.60 – – – – ELPEX-B NR -50 1.1 1.0 – – – – – – – ELPEX-B CR -15 – 1.0 1.0 1.0 – – – – – ELPEX-S SN, NN, WN NR -40 1.1 1.0 1.25 1.40 1.60 – – – – ELPEX-S NX VMQ -40 1.1 1.0 1.0 1.0 1.0 1.1 1.25 1.4 1.6 1) The N-EUPEX coupling is not suitable for shock loads when used at low temperatures.
www.jbj.co.uk/couplings.html#flender CR = chloroprene rubber (FRAS fire-resistant and anti-static). TPU = polyurethane. NR = natural rubber, natural-synthetic rubber mixture. Applying the frequency factor FF, the dynamic torque loadmust be lower than the coupling fatigue torque. T ≥ T ⋅ FF KW W NBR = nitril-butadiene-rubber (Perbunan). HNBR = hydrated acrylonitrile butadiene rubber. VMQ= silicone. Coupling size T ≥ T • FB • FT KN N In the case ofARPEX and ZAPEX coupling types, no temperature factor (FT= 1.0) need be taken into account. Coupling load at maximumand overload conditions Themaximum torque is the highest load acting on the coupling in normal operation. Examples of maximum torque conditions are: Starting operations, stopping operations or usual operating conditions withmaximum load. T ≥ T • FT Kmax Max Examples of overload torque conditions are: Motor short circuit, emergency stop or blocking because of component breakage. Overload torques at a frequency of once a month are permitted and must be lower than the maximum overload torque of the coupling. The overload condition may last only a short while, i.e. fractions of a second. Coupling load due to dynamic torque load Maximum torques at a frequency of up to 25 times an hour are permitted andmust be lower than themaximum coupling torque. T ≥ T • FT KOL OL Overload torques aremaximum loads which occur only in combination with special, infrequent operating conditions. Dynamic torque load Frequency of the dynamic torque load Frequency of the dynamic torque load f ≤ 10 Hz frequency factor FF = 1.0 err f > 10 Hz frequency factor FF = √(f /10 Hz) err err Checking themaximumspeed Checking bore diameter, mounting geometry and coupling design The check must be made on the basis of the dimension tables. The maximum bore diameter applies to parallel keyways to DIN 6885. For other keyway geometries, themaximumbore diameter can be reduced. On request, couplings with adapted geometry can be provided. For the ZAPEX andARPEX series, the frequency factor is always FF = 1.0. The N-EUPEX DS, ELPEX-B, ELPEX-S and ELPEX coupling series throw overload. The elastomer element of these couplings is irreparably damaged without damage to metal parts when subjected to excessive overload. These coupling series are designated as non-fail-safe. These types that fail can be fitted with a so-called fail-safe device. This additional component enables emergency operation, even after the rubber element of the coupling has been irreparably damaged. Coupling behavior under overload conditions Selection of the Coupling Size For all load situations nKmax ≥ nmax For all load situations, the actual shaft misalignment must be less than the permitted shaft misalignment. The ZAPEX, N-ARPEX, ARPEX, N-EUPEX, RUPEX and N-BIPEX coupling series can withstand overloads until the breakage of metal parts. These coupling series are designated as fail-safe. Checking permitted shaft misalignment 9 #DriveLineHarmony Technical Information Mechanical Power Transmission Couplings
www.jbj.co.uk/couplings.html#flender 10 #DriveLineHarmony Technical Information Mechanical Power Transmission Couplings Checking shaft-hub connection Shrink fit DIN 7190 Spline to DIN 5480 Shaft-hub connection Suggestion for calculationmethod Fitting recommendations for the shaft-hub connection are detailed on the following page 11.. Keyway connection to DIN 6885-1 DIN 6892 The coupling hub is frequently fitted flush with the shaft end face. If the shaft projects, the risk of collision with other coupling parts must be checked. If the shaft is set back, in addition to the load-bearing capacity of the shaft hub connection, the correct positioning of the hub must be ensured as well. If the bearing hub length is insufficient, restorative forces may cause tilting movements and so wear to and impairment of the axial retention. Also, the position of the set screw to be positioned on sufficient shaft or parallel key material must be noted. The torques specified in the tables of power ratings data of the coupling series do not necessarily apply to the shaft hub connection. Depending on the shafthub connection, proof of form stability is required.It is recommended to obtain proof of form strength by using calculation methods in accordance with the current state of the art Bolted flange connection VDI 2230 Flange connection with close-fitting bolts Checking low temperature and chemically aggressive environment Couplings Features of Standard Type N-EUPEX, RUPEX, N-BIPEX, ELPEX-S, ELPEX-B Parallel keyway to DIN 6885-1 keyway width JS9 The minimum permitted coupling temperature is specified in the Temperature factor FT table. In the case of chemically aggressive environments, please consult themanufacturer. and FLUDEXwith keyway toASMEB17.1 All series Preservation with cleaning emulsion FLUDEX couplings Fuse 140 °C Balancing quality G16 ELPEX-S, ELPEX-B and ELPEX coupling series ZAPEX, N-ARPEX,ARPEX, N-EUPEX, RUPEX, N-BIPEX, All series Unpainted All coupling series exceptARPEX clamping hubs Bore tolerance H7 other parts: Bore toleranceM7 brake drums of the N-EUPEX and RUPEX series. Bore diameter metric in the case of ZAPEX, N-ARPEX andARPEX All coupling series except FLUDEX Axial locking by means of set screw N-ARPEX andARPEX clamping hubs Bore tolerance H6 FLUDEX coupling series Axial lock by means of set screw or end washer Bore diameter metric in the case of the coupling series as well as coupling hubs with applied brake disks or Parallel keyway to DIN 6885-1 keyway width P9 FLUDEX couplings with keyway toASMEB17.1 Hollow shafts: bore tolerance K7 All coupling series with bore diameter - imperial Parallel keyway toASMEB17.1 ELPEX, FLUDEX coupling series. All coupling series Balancing in accordance with half parallel key standard FLUDEX coupling series Balancing quality G6.3
www.jbj.co.uk/couplings.html#flender 11 #DriveLineHarmony Fitting Recommendations Mechanical Power Transmission Couplings ARPEX coupling series. m6 K7 s6 F7 Bore Shaft For many applications, the fit assignment m6/H7 is especially suitable. Description Application Shaft tolerance Bore tolerance k6 H7 Only for steel hubs h6 P7 Preferred for ZAPEX and k6 M7 Sliding fit with parallel key connection not suitable for reversing operation For steel and cast hubs j6 H7 n6 J7 The permitted hub tension v6 H6 must be urgently checked. x6 H6 Deviation table to DIN ISO 286 for above-mentioned fits for bore diameters from 10 mm to 250 mm h6 J7 Press fit with parallel key connection not suitable for reversing operation For steel and cast hubs h6 K7 Interference fit with parallel key connection suitable for reversing operation For steel and cast hubs m6 H7 n6 H7 Fitting recommendations h6 M7 p6 H7 Shrink fit connection without parallel key Only for steel hubs u6 H6 Deviations in μm Bore Diameter Above Up to F7 H7 J7 K7 M7 P7 h6 j6 k6 m6 n6 p6 18 30 +41 +21 +12 +6 0 -14 0 +9 +15 +21 +28 +35 +20 0 -9 -15 -21 -35 -13 -4 +2 +8 +15 +22 30 50 +50 +25 +14 +7 0 -17 0 +11 +18 +25 +33 +42 +16 0 -8 -12 -18 -29 -11 -3 +1 +7 +12 +18 +25 0 -11 -18 -25 -42 -16 -5 +2 +9 +17 +26 50 80 +60 +30 +18 +9 0 -21 0 +12 +21 +30 +39 +51 +43 0 -14 -28 -40 -68 -25 -11 +3 +15 +27 +43 +30 0 -12 -21 -30 -51 -19 -7 +2 +11 +20 +32 180 250 +96 +46 +30 +13 0 -33 0 +16 +33 +46 +60 +79 +50 0 -16 -33 -46 -79 -29 -13 +4 +17 +31 +50 10 18 +34 +18 +10 +6 0 -11 0 +8 +12 +18 +23 +29 80 120 +71 +35 +22 +10 0 -24 0 +13 +25 +35 +45 +59 120 180 +83 +40 +26 +12 0 -28 0 +14 +28 +40 +52 +68 +36 0 -13 -25 -35 -59 -22 -9 +3 +13 +23 +37
www.jbj.co.uk/couplings.html#flender Parallel keyway G_MD10_EN_00198 t2 d6 d2 d3 d4 d5 60° 6,3 120° d1 t1 t3 t4 t5 Diameter in mm 24 25 28 30 32 35 38 40 42 45 48 50 55 60 65 70 75 80 85 90 95 100 ISO tolerance zone k6 m6 End length in mm 50 60 80 110 140 170 210 Cylindrical shaft ends, extract from DIN 748 Part 1 (long) Central holes according to DIN 332 Part 2 Recommended DS form dimensions 10 13 M4 3.3 4.3 6.7 7.4 10 14 3.2 2.1 0.3 1) 2) diameter ranges d d1 d d3 d4 d5 t1 t2 t3 t4 t5 6 2 above up to +2 min. +1 approx. approx. 7 10 M3 2.5 3.2 5.3 5.8 9 12 2.6 1.8 0.2 13 16 M5 4.2 5.3 8.1 8.8 12.5 17 4 2.4 0.3 30 38 M12 10.2 13 18.1 19.8 28 37 9.5 4.4 0.7 3) 320 500 M42 37.5 43 60.3 66.6 84 105 26 15 2.7 1) Diameter refers to the finished workpiece. 2) Tap hole drill diameter according to DIN 336 Part 1. 3) Dimensions not acc. to DIN 332 Part 2. 24 30 M10 8.5 10.5 14.9 16.3 22 30 7.5 3.8 0.6 Form DS (with thread) DIN 332/2 85 130 M24 21 25 34.2 38 50 63 18 8 1.6 3) 130 225 M30 26.5 31 40.2 44.6 60 77 22 8 1.9 16 21 M6 5 6.4 9.6 10.5 16 21 5 2.8 0.4 38 50 M16 14 17 23 25.3 36 45 12 5.2 1.0 21 24 M8 6.8 8.4 12.2 13.2 19 25 6 3.3 0.4 50 85 M20 17.5 21 28.4 31.3 42 53 15 6.4 1.3 3) 225 320 M36 32 37 49.7 55 74 93 22 11 2.3 12 #DriveLineHarmony Fitting Recommendations Mechanical Power Transmission Couplings
www.jbj.co.uk/couplings.html#flender ØD+T2 T1 H T2 ØD B G_MD10_XX_00172 above up to keyway depth 17 22 6 6 3.5 2.8 +0.1 +15 -12 Diameter Keyway width Parallel key Shaft keyway Hub keyway Deviation for Deviation table for -12.5 -31 -18 -51 -15 -42 30 38 10 8 5 3.3 +0.2 +18 -15 -21.5 -61 85 95 25 14 9 5.4 +0.2 +26 -22 mm mm mm mm mm mm mm μm μm 44 50 14 9 5.5 3.8 +0.2 +21.5 -18 -21.5 -61 10 12 4 4 2.5 1.8 +0.1 +15 -12 -26 -74 38 44 12 8 5 3.3 +0.2 +21.5 -18 75 85 22 14 9 5.4 +0.2 +26 -22 -15 -42 height depth depth shaft & hub keyway width B -21.5 -61 58 65 18 11 7 4.4 +0.2 +21.5 -18 -26 -74 -26 -74 -21.5 -61 50 58 16 10 6 4.3 +0.2 +21.5 -18 D D B H T1 T2 JS9 P9 12 17 5 5 3 2.3 +0.1 +15 -12 -15 -42 22 30 8 7 4 3.3 +0.2 +18 -15 -18 -51 65 75 20 12 7.5 4.9 +0.2 +26 -22 10 3 3 1.8 1.4 +0.1 +12.5 -6 With two parallel keyways, the keyway width tolerance JS9 should be specified in order to simplify the assembly. The shaft keyway width has to be specified with the tolerance N9. In harsh operating conditions or during reversing operation, the keyway width tolerance P9 must be preferred. Parallel Key Connections to Din 6885-1 For moderate operating conditions, the hub keyway tolerance JS9 is recommended. 13 #DriveLineHarmony Fitting Recommendations Mechanical Power Transmission Couplings
www.jbj.co.uk/couplings.html#flender ØD+T2 T1 H T2 ØD B G_MD10_XX_00172 Parallel Key Connections to Din 6885-1 For moderate operating conditions, the hub keyway tolerance JS9 is recommended. In harsh operating conditions or during reversing operation, the keyway width tolerance P9 must be preferred. The shaft keyway width has to be specified with the tolerance N9. With two parallel keyways, the keyway width tolerance JS9 should be specified in order to simplify the assembly. -26 -74 260 290 63 32 20 12.4 +0.3 +37 -32 290 330 70 36 22 14.4 +0.3 +37 -32 330 380 80 40 25 15.4 +0.3 +37 -32 above up to keyway depth -31 -88 -31 -88 95 110 28 16 10 6.4 +0.2 +26 -22 110 130 32 18 11 7.4 +0.2 +31 -26 height depth depth shaft & hub keyway width B -31 -88 Diameter Keyway width Parallel key Shaft keyway Hub keyway Deviation for Deviation table for D D B H T1 T2 JS9 P9 150 170 40 22 13 9.4 +0.3 +31 -26 170 200 45 25 15 10.4 +0.3 +31 -26 130 150 36 20 12 8.4 +0.3 +31 -26 -31 -88 200 230 50 28 17 11.4 +0.3 +31 -26 230 260 56 32 20 12.4 +0.3 +37 -32 -37 -106 mm mm mm mm mm mm mm μm μm -31 -88 -37 -106 -37 -106 -37 -106 380 440 90 45 28 17.4 +0.3 +43.5 -37 -43.5 -124 440 500 100 50 31 19.4 +0.3 +43.5 -37 -43.5 -124 14 #DriveLineHarmony Fitting Recommendations Mechanical Power Transmission Couplings
www.jbj.co.uk/couplings.html#flender Standards Machines Couplings Balancing Shaft-hub connections Formula symbols Key to the formula symbols 2006/42/EC EC Machinery Directive 94/9/EC ATEX Directive – Manufacturer – and ATEX Guideline to Directive 94/9/EC 2014/34/EU ATEX Directive – Manufacturer 1999/92/EC ATEX Directive – Operator – and ATEX Guideline to Directive 1999/92/EC DIN EN 13463 Non-electrical equipment for use in potentially explosive atmospheres DIN EN 1127 Explosive atmospheres, explosion prevention and protection DIN EN 50347 General-purpose three-phase induction motors having standard dimensions and outputs DIN 740 Flexible shaft couplings Part 1 and Part 2 VDI Guideline 2240 Shaft couplings - Systematic subdivision according to their properties VDI Technical Group Engineering Design 1971 API 610 Centrifugal Pumps for Petroleum, Chemical and Gas Industry Services API 670 Machinery Protection System API 671 Special Purpose Couplings for Petroleum, Chemical and Gas Industry Services ISO 10441 Petroleum, petrochemical and natural gas industries – Flexible couplings for mechanical power transmissionspecial-purpose applications DIN ISO 1940 Requirements for the balancing quality of rigid rotors DIN ISO 21940-32 Mechanical vibrations; standard governing the type of parallel key during balancing of shafts and composite parts DIN 6885 Driver connections without taper action – parallel keys – keyways SAE J620d Flywheels for industrial engines ... DIN 6288 Internal-combustion piston engines Connection dimensions and requirements for flywheels and flexible coupling ASME B17.1 Keys and keyseats DIN EN 50347 General-purpose three-phase induction motors with standard dimensions and output data BS 46-1:1958 Keys and keyways and taper pins Specification Name Symbol Unit Explanation Torsional stiffness, dynamic CTdyn Nm/rad For calculating torsional vibration Excitation frequency ferr Hz Excitation frequency of motor or driven machine Moment of inertia J kgm2 Moment of inertia of coupling sides 1 and 2 Axial misalignment DKa mm Axial misalignment of the coupling halves Radial misalignment DKr mm Radial misalignment of the coupling halves Angular misalignment DKw ° Angular misalignment of the coupling halves Service factor FB Factor expressing the real coupling load as a ratio of the nominal coupling load Frequency factor FF Factor expressing the frequency dependence of the fatigue torque load Temperature factor FT Factor taking into account the reduction in strength of flexible rubber materials at a higher temperature Weight m kg Weight of the coupling Rated speed nN rpm Coupling speed Maximum coupling speed nKmax rpm Maximum permissible coupling speed Rated power PN kW Rated output on the coupling, usually the output of the driven machine Rated torque TN Nm Rated torque as nominal load on the coupling Fatigue torque TW Nm Amplitude of the dynamic coupling load Maximum torque Tmax Nm More frequently occurring maximum load, e.g. during starting Overload torque TOL Nm Very infrequently occurring maximum load, e.g. during short circuit or blocking conditions Rated coupling torque TKN Nm Torque which can be transmitted as static torque by the coupling over the period of use. Maximum coupling torque TKmax Nm Torque which can be frequently transmitted (up to 25 times an hour) as maximum torque by the coupling. Coupling overload torque TKOL Nm Torque which can very infrequently be transmitted as maximum torque by the coupling. Fatigue coupling torque TKW Nm Torque amplitude which can be transmitted by the coupling as dynamic torque at a frequency of 10 Hz over the period of use. Resonance factor VR Factor specifying the torque increase at resonance Temperature Ta °C Ambient temperature of the coupling in operation Damping coefficient Y Psi Damping parameter 15 #DriveLineHarmony Technical Information Mechanical Power Transmission Couplings
www.jbj.co.uk/couplings.html#flender Selection criterion ZAPEX ARPEX N-EUPEX N-EUPEX DS RUPEX N-BIPEX ELPEX-B ELPEX-S ELPEX Torque range Rated coupling torque TKN in Nm 850 ... 7200000 92 ... 1450000 19 ... 62000 19 ... 21200 200 ... 1300000 12 ... 4650 24 ... 14500 330 ... 63000 1600 ... 90000 Speed range Peripheral speed vmax = DA ⋅nmax/19100 60 100 36 36 60 45 35 66 60 Torque load uniform non uniform rough very rough Installation & alignment Rigid installation, well aligned Rigid installation, roughly aligned Flexible installation Torsional stiffness Torsionally rigid Torsionally flexible Highly flexible Torque transmission Free of torsional backlash Low torsional backlash Overload withstand capability Assembly Plug-in assembly with Taper clamping bushes Maintenance Wear parts easily dismountable Maintenance-free Low-maintenance - interval 1 year Environment ATEX Approval – Operating temperature range -20 ... +80 °C -40 ... +280 °C -50 ... +100 °C -30 ... +80 °C -50 ... +100 °C -50 ... +100 °C -50 ... +70 °C -40 ... +120 °C -40 ... +80 °C Chemically aggressive Coupling material Cast iron Steel Stainless steel Add-on parts / types Adapter Brake disk Brake drum Axial backlash limiter Shiftgear Flange type Flange to SAE J620d Standard On request Not possible X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X 16 #DriveLineHarmony Coupling Preselection & Options Mechanical Power Transmission Couplings the coupling series to be used. The FLUDEX series operates positively and transmits the torque with the aid of a flowing oil or water filling. FLUDEX couplings are used to reduce starting and/or overload torques. During starting, the motor may, for example, run up within a very short time; because of the FLUDEX coupling, the drive train with the drivenmachinemay accelerate after a delay and without increased torque load. The coupling series is frequently determined by the driven machine and the design of the drive train. Common selection criteria are listed below and assigned to coupling properties, which are used to select the coupling series.Additionally, the price of the coupling and availability are important criteria for determining Quick Reference SelectionGrid The FLUDEX coupling cannot compensate for shaft misalignment and is therefore designed in combination with a displacement coupling, a cardan shaft or a belt drive. The displacement couplingmay be selected in accordance with the criteria described below.
www.jbj.co.uk/couplings.html#flender Flender Mechanical Power Transmission Couplings available from jbj Techniques 17 #DriveLineHarmony Flexible Flender couplings have a wide range of possible applications. A broad standard modular system as well as N-EUPEX, RUPEX and N-BIPEX Flexible Couplings specially designed application specific couplings are available. N-EUPEX cam couplings Rated torque: 19 Nm … 62,000 Nm RUPEX pin-and-bush couplings Rated torque: 200 Nm … 1,300,000 Nm N-BIPEX cam couplings Rated torque: 12 Nm … 4,650 Nm ELPEX, ELPEX-B and ELPEX-S Highly Flexible Couplings ® ELPEX couplings are free of circumferential back-lash. Their damping capacity and low torsional stiff-ness make them especially ELPEX elastic ring couplings Rated torque: 1,600 Nm … 90,000 Nm ELPEX-B elastic tire couplings Rated torque: 24 Nm … 14,500 Nm ELPEX-S rubber disk couplings Rated torque: 330 Nm … 63,000 Nm Torsionally rigid couplings ZAPEX gear couplings and ARPEX all-steel couplings Their purposes of application vary according to specific requirements with respect to shaft misalignment, temperature and torque. For transmission of high torques, we offer both ARPEX all-steel couplings and ZAPEX gear couplings in a range of versions. ZAPEX gear couplings Rated torque: 1,300 Nm … 7,200,000 Nm ARPEX high performance couplings Rated torque: 1,000 Nm … 588,500 Nm N-ARPEX and ARPEX all-steel couplings Rated torque: 92 Nm … 2,000,000 Nm Backlash-free couplings BIPEX-S and SIPEX The vibration-damping, electrically insulating plug-in BIPEX-S elastomer couplings and SIPEX metal bellows couplings with very high torsional stiffness deliver especially isogonal torque transmission. BIPEX-S and SIPEX Rated torque: 0.1 Nm … 5,000 Nm
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