Mechanical power take-off units

Consist of a complete clutch assembly with shaft and bearings mounted in a cast-iron housing for easy engine installation.

Available in sizes up to 533 mm (SAE 21), these mechanical PTOs are ideal for many basic actuation installations.

Remotely actuated versions are available for safer, easier operation and greater equipment design flexibility.

An extra margin of strength

Actual design torque capacity of the clutches used in these power take-offs is in excess of the power rating listed. This permits the power take-offs in proper adjustment to withstand temporary torque overloads. Rated torque can be transmitted while moderately slipping during short periods without permanent damage.

Specifications

» Suitable for Duty Class II industrial applications with internal combustion engines up to 1243 kW (1667 hp) and with standard SAE flywheel housing dimensions from No. 6 through No. 00.

» Contain clutches ranging in size from one plate SAE 6.5 to one plate SAE 14; in two-plate size from SAE 11.5 to SAE 18; and three-plate size from SAE 11.5 to SAE 21.

» Standard sealed pilot ball or roller bearings eliminate the lubrication requirement and shaft rifle-drilling normally encountered with standard pilot bearings. Also available as options: ball bearing throw-out collars and finger springs.

» kW/horsepower and torque capacities listed can be increased by the use of sintered-iron clutch plates, which are available as optional equipment in the SAE 8 through SAE 21 sizes.

» All bearings, shafts and other parts are designed with liberal safety factors to maximize life under normal operating conditions.*

* To avoid overloading the shaft and bearings, use the allowable side-pull load data in this bulletin, and calculate the side load. The resultant value should be less than the corresponding maximum value listed for each power take-off.

For assistance please contact jbj Techniques Limited technical office, telephone: +44 (0)1737 767493 or email: info@jbj.co.uk

Special power take-offs are available. These include the innovative straddle bearing concept and a limited-attendance PTO that contains a positive throw-out collar clearance mechanism and extended lubrication intervals. For original equipment manufacturers, special power take-off units can be designed to meet individual requirements when sufficient volume is indicated. Design variations can range from minor changes to entirely new concepts.

How To Choose The Appropriate PTO

Several factors must be considered in the selection process in addition to duty service, such as:

SPEED LIMITS • SIDE-LOAD LIMITS • CLUTCH TORQUE LIMITS

The selections are usual dry clutch disconnect type applications where engagements are infrequent and are at low (idle) input speed. Once engaged operation continues for one hour or more, engaging the clutch at higher input speed will reduce component life. Refer to the following duty classifications and examples.

Application Data:

SAE Housing Size
SAE Flywheel Size
Number of Engagements
Pulley Pitch Diameter
Pilot Bearing Diameter
Input Power to Clutch
Input Torque to Clutch
Maximum Output Shaft RPM
Load Centre-line "X" Dimension (side-load applications)

Determine duty classification

(page 5)

PTO Selection Procedure
1. Calculate NET Input Power or Torque to PTO

2. Calculate imposed side-load using the following formula (side-load only):

(metric) L = 1945010 x kW x F x LF
N x D

(imperial) L = 126,000 x HP x F x LF
N x D

L = Actual Applied Load kg (lbs)
N = Shaft Speed (rpm)
D = Pulley Pitch Diameter mm (in)
F = Load Factor
1.0 for Chain / Gear Drive
1.5 for Timing Belts
2.5 for All V Belts
3.5 for Flat Belts

LF = 2.1 for reciprocating compressors and other ‘severe shock drives’ and 1.8 for ‘large inertia type drives’ (crushers, chippers, planers, etc.)

3. Use the PTO rating table on page 6 and the side-load tables on pages 7 and 8 with the following information:

» NET input power or torque to clutch.
» SAE flywheel size.
» SAE housing size.
» maximum PTO output shaft speed.
» calculated side-load (side-load applications).

Find proper duty class along top row and SAE housing & flywheel size along left-hand column of the rating table on page 6.

A PTO that has a power or torque rating greater than the calculated application power or torque rating is suitable for the application.

The PTO output shaft speed should be at or under the listed ratings for the drive rings.

Use PTO output shaft speed and calculated side-load and refer to tables on pages 7 and 8 to verify that the side-load is at or under the load at the given speed.

PTO sizing calculation example and ordering code example.

Links to the mechanical PTOs:
1 » SP series: Standard PTO line, up to 11388.87 Nm (8,400 ft-lb). Straddle bearing housing available.

2 » CA series: Standard in-line, up to 298.28 kW (400 hp).

3 » C(X) series: Standard, available in sizes 6.5" to 11.5".

4 » SL series: Spring loaded clutch, 11.5" to 14".

5 » TC series: Spring loaded automotive style 13" clutch.

6 » IB series: Heavy duty PTO line. Ventilated plates and drive rings. Up to 11388.87 Nm (8,400 ft-lb).

7 » RB series: Rubber block drive, no clutch disconnect, 11" single row, 14" double row.

Download selection guide: Special units, selection process, ordering codes, duty classifications, allowable side loads and other information to specify the correct model of mechanical PTO for your application

Download selection guide for mechanical PTOs

SP Series

SAE 3 through SAE 00.
SAE 11.5” through SAE 21”.
Single, double & triple organic drive plate (standard).
Sintered iron available.
Capacity from 617 to 11,390 Nm.
(455 to 8400 lb.ft.).
Side load or in-line applications.
Tapered roller bearings on main shaft.
Bronze or ball bearing throw out collar.

SP-S Series

SAE 1 through SAE 0.
SAE 14” through SAE 18”.
Single, double & triple organic drive plate (standard).
Sintered iron available.
Capacity from 3295 to 10,170 Nm
(2430 to 7500 lb.ft.).
High side load.
No pilot bearing.
Ball bearing throw out collar.

SP-IL Series

SAE 1 through SAE 0.
SAE 14” through SAE 18”.
Double & triple organic drive plate.
Capacity from 2197 to 10,170 Nm.
(1620 to 7500 lb.ft.)
Sintered iron available.
In-line applications only - no side load.
Bronze or ball bearing throw out collar.
No pilot bearing.

CA Series

SAE 4 through SAE 3.
SAE 10”.
Single & double organic drive plate.
Capacity from 610 to 1220 Nm.
(450 to 900 lb.ft.).
Sealed for life main ball bearing.
In-line applications only.
Bronze throw out collar.

C(X) Series

SAE 6 through SAE 1.
SAE 6.5” through SAE 11.5”.
Single organic drive plate – standard.
Sintered iron available: 8” through 11.5”.
Capacity from 216 to 525 Nm.
(159 lb. ft. to 387 lb. ft.).
Limited side load.
Ball bearing on main shaft.
Bronze throw out collar.

Pump Mount

SAE “A” through SAE “D” pads.
SAE 4 through SAE 1 housing.
SAE 11.5” clutch.
Various input options.
Shaft clutch.

SL Series

SAE 4 through SAE 1.
SAE 11” through SAE 14”.
Single & double organic drive plate.
Capacity from 475 to 1356 Nm.
(350 to 1000 lb.ft).
Spring loaded clutch eliminates need for adjustment.
Re-greasable main & pilot bearings.
Sealed pilot bearing optional.
Limited side load.

TC Series

SAE 3
13” automotive style clutch.
Capacity to 610 Nm. (450 lb.ft.).
Spring loaded clutch.
Limited side load.
Sealed for life pilot bearing.
No adjustment required.

IB Series

SAE 1 through SAE 00.
SAE 11.5” through SAE 21”.
Single & double organic drive plate.
Sintered iron drive plate available.
Capacity to 2197 to 11,390 Nm .
(1620 to 8400 lb.ft.).
Bronze throw out collar.
Ventilated center plates & drive ring.
Higher side-load capability.
Tapered roller bearings on main shaft.

RB Series

SAE 3 through SAE 1.
SAE 11.5” through SAE 14”.
Rubber block drive.
11” single row.
14” double row.
Direct drive - no disconnect.
Limited side load.

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Hydraulic power take-off units

Available in side-load straddle-bearing clutched models, in-line clutched and non-clutched models.

For similar applications as the mechanical PTOs. Hydraulic clutches can be used wherever a disconnect is required between driven equipment and the prime mover.

Ideally suited for applications such as:

» Centrifugal pumps
» Waterjets
» Propellors
» Generators
» Hydraulic pumps
» Agitators

» Bow thrusters
» Winches
» Horizontal grinders
» Blowers
» Compressors
» Conveyors

» Rock crushers
» Mud pumps
» Piston pumps
» Hammer mills
» Tub grinders
» Fans

Hydraulic wet clutches . . . .

To see the hydraulic PTOs use these 5 links:
1 » HP series: In-line or side-load applications to 783 kW (1,050 hp) @2,100 rpm.

2 » HPTO series: In-line or side-load applications to 1119 kW (1,500 hp) @2,100 rpm.

3 » PFI series: Pump mount or shaft output with integrated oil pump. Up to 380 kW (510 hp).

Hydraulic dry clutches . . . .

4 » RC series: Remotely actuated via hydraulic circuit.

5 » RO series: Remotely actuated via hydraulic / pneumatic circuit PTO line. Up to 11388.87 Nm (8,400 ft-lb). Straddle bearing housing available.

HP610S

The HP610S eliminates the need for manual adjustment and high speed engagement, while eliminating jammed engagements.
• 783 kW (1,050 hp) @ 2,100 RPM
• SAE 1 and SAE 0
• SAE 14” and SAE 18”
• Via Torsional Coupling

• Wet Hydraulic Clutch
• In Line or Side Load
• Electronic Control

Optional Pump Drive Tower
  • 4 Pads
  • To SAE D
  • 358 kW (480 hp) total / 224 kW (300 hp) each.
  • 1:1 Ratio

Designed For: Heavy duty side load applications.

Further information including dimensions, weight, torque, etc » pages 17 to 18 of this catalogue link.

HP300I

With features similar to the HP610S, the HP300I also eliminates the need for manual adjustment and high speed engagement, while eliminating jammed engagements.
• 783 kW (1,050 hp) @ 2,100 RPM.
• SAE 1 and SAE 0.
• SAE 14” and SAE 18”.
• Via Torsional Coupling.

• Wet Hydraulic Clutch.
• In Line Applications.
• Electronic Control.

Optional Pump Drive Tower.
  • 4 Pads.
  • To SAE D.
  • 358 kW (480 hp) total / 224 kW (300 hp) each.
  • 1:1 Ratio.

Designed For: Heavy duty in line applications.

Further information including dimensions, weight, torque, etc » pages 13 to 14 of this catalogue link.

HP1200

The HP1200 is an oil-filled, multiple disc, hydraulically-actuated self-adjusting clutch. The HP1200 has been developed with a number of unique features that offer reliability, productivity and power, including the following listed below.

• Hydraulically actuated and self-adjusting wet clutch.
• Suitable for in-line and side-load applications.
• Advanced control system for smooth engagement.
• Remote actuation via J1939 or switch input.
• No pilot bearing.
• High side load capability.
• Maximum power rating 927 kW (1243 hp) @ 1800 rpm.
• Two towers with two pump pads each. 298 kW (400 hp) maximum capacity per tower.
410.135 kW (550 hp) maximum capacity for both towers.
• Available pump pads: SAE “A”, SAE “B”, SAE “C”, SAE “D”, SAE “E”.
• Pump tower rotatable by 0°/45°/90° CW/CCW.
• Optional 0.86:1 speed increase on pump tower.
• SAE 0 input housing.
• SAE 460 (18”) input coupling.
• Optional integrated reservoir.
• Standard charge/lube pump included.

Further information including dimensions, weight, torque, etc » pages 19 to 20 of this catalogue link.

HPTO 140 / 244 / 366 series hydraulic PTO available from jbj Techniques

HPTO 140 / HPTO 244 / HPTO 366

This series of compact and lightweight power take offs incorporates a hydraulically-operated clutch. Advantages include improved reliability, increased efficiency, longer lifespan and lower maintenance costs.

• Self Adjustment (no more clutch adjustments).
• Remote Control (Electric or Mechanical).
• Elimination of the Pilot Bearing.
• Soft and progressive starts of the load.

Designed For: Stone crushers, wood chippers, grinders, marine drives (main propulsion and auxiliaries) and various centrifugal pumps, fans and blowers.

Further information including dimensions, weight, torque, etc » pages 21 to 22 of this catalogue link.

PFI-60 and PFI-120

These power take offs contain an integral bi-directional oil pump, integral pressure relief valve and SAE pump mount or keyed shaft output.

PFI-60
• 205 kW (275 hp) capability.
• 12 or 24 Volt DC solenoid.
• SAE 3, 2 and 1 pump pad configurations.
• 1000 kg side load capability.

PFI-120
• 380 kW (510 hp) capability.
• 12 or 24 Volt DC solenoid.
• SAE 3, 2 and 1 pump pad configurations.
• 1000 kg side load capability.

Designed For: Direct engine mounting or mounted to AM pump drive and compact applications.

Free standing clutches of the multiple plate, oil bath type. These clutches are particularly suited to arduous applications and are capable of withstanding high radial loads.

The PFI 60 and PFI 120 are manufactured with input and output shafts. The PFI 60P and PFI120P are intended for hydraulic pump direct connection with the same pump adaptor flanges and couplings as on AM 230 - 450 pump drives which means the possibility to fit a large number of pumps with standard components.

Further information including dimensions, weight, torque, etc » pages 1 - 3 of this catalogue link.

RC series hydraulic PTO available from jbj Techniques

RC Series remote control

Hydraulically actuated.
Self-adjusting clutch.
Oil lubricated tapered roller main bearings.
No pilot bearing required.
Advanced controls for high inertia loads.
Optional sintered iron and composite plates.
Suitable for side load and in-line applications.

Further information including dimensions, torque, etc » pages 1 and 2 of this catalogue link

RO series hydraulic PTO available from jbj Techniques

RO Series remote over-centre

Hydraulic or pneumatic actuation
6.21 to 6.89 bar (90 To 100 psi) engagement pressure.
Suitable for side load and in-line applications.
Tapered roller main bearings.
Optional sintered iron & composite plates.
Standard ball bearing throw out collar.
Field conversion kits available.
Creates suitable application torque capacity.

Further information including dimensions, torque, etc » pages 3 to 6 of this catalogue link.