A Century of Leadership

Power Take-Offs

Twin Disc has manufactured power take-offs for nearly 100 years—longer than anyone else in the market. As the brand leader in both wet and dry clutch technology, we offer you unmatched expertise in transmitting power to machinery.

Hydraulically Actuated

When you need a disconnect between the driven equipment and the prime mover, choose self-adjusting Twin Disc hydraulic PTOs. They support maximum side loads for increased efficiency and decreased vibration, yet take up little space thanks to a compact design.

  • Configurable auxiliary pump drives
  • Engine interface via J1939
  • Optional graphical user interface (GUI)
  • Smart electronic controls for smooth, reliable engagement and equipment protection

Mechanical Power Take-Offs

Twin Disc offers more mechanical PTOs in more capacities than any other provider, delivering options ideal for basic actuation installations. Where machinery configuration complicates access, choose our remotely actuated mechanical PTOs for greater design flexibility and safer, easier operation.

  • Suitable for Duty Class II industrial applications with internal combustion engines up to 1667 hp and with standard SAE flywheel housing dimensions from No. 6 through No. 00.
  • Clutches sizes range from one-plate 6.5″ to 14″; two-plate 11.5″ to 18″; and three-plate 14″ to 21″.
  • Optional sealed pilot ball or roller bearings eliminate need for lubrication and shaft rifle-drilling. Ball bearing throw-out collars and finger springs available.
  • Horsepower and torque capacities can be increased with sintered-iron clutch plates, optional for sizes 8″ through 21″.

Mechanical power take-off

SP321P

Description
  • Available in sizes 11.5″ through 21.0″
  • Tapered roller main bearings
  • Optional ball bearing throw out
  • Buit-in hex nut
  • Transmits suitable application torque capacity
  • More suitable for side load applications
  • Allows for more frequent engagements
  • Optional sintered iron plates for transmitting 25% higher torque capacity
  • Eases adjustment verification
SPECIFICATIONS

Model Number

SAE Housing

Max. Input Torque
Nm (lb-ft)

Max. Input Torque
Nm (lb-ft)

Maximum Safe Speed

Maximum Safe Speed

Maximum Safe Speed

Maximum Safe Speed

Weight
kg (lbs)

Solid Plates

Solid Plates

Split Plates

Split Plates

Organic

Sintered

Cast
Drive Ring

Nodular
Drive Ring

Cast
Drive Ring

Nodular
Drive Ring

SP321P9

00

9132 (6730)

11398 (8400)

1800

N/A

1400

N/A

503 (1110)

DIMENSIONS
Enlarge
Publications:
Installation Drawings:

Model

Drawing Number

Clutch Group

SAE Housing

Ouput Shaft

Pilot Bearing

Download

SP321P00

SP321P901

3 plate, 21″ PLATE: SOLID MOLDED COLLAR: 4.75″ BRONZE COLLAR

SAE #00

Ø4.72″ x 10″

120mm BALL BRG (CARTRIDGE SEALED)

pdf

SP321P00

SP321P902

3 plate, 21″ PLATE: SINTERED COLLAR: 4.75″ BRONZE COLLAR

SAE #00

Ø4.72″ x 10″

120mm BALL BRG (CARTRIDGE SEALED)

pdf

SP321P00

SP321P906

3 plate, 21″ PLATE: SINTERED COLLAR: 4.75″ BRONZE COLLAR

SAE #00

Ø4.72″ x 10″

120mm BALL BRG (CARTRIDGE SEALED)

pdf

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