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Pump Drives

Twin Disc now offers a new line of pump drives to meet a broad range of hydraulic system set-ups and application needs. These drives are available in a wide variety of gear ratios, including both speed increasing and reducing configurations.

The modular design of these pump drives enables you to choose from several input options, including a rubber block drive, or clutch to match your SAE engine flywheel dimensions. Independent mounting is also an option, both direct and with a clutch.

For your pump mounting requirements, Twin Disc offers standard SAE adaptor kits as well as a wide variety of non-SAE adaptations for your special needs.

With models having one, two, three, four or six pump pads, Twin Disc is sure to have a pump drive to complement your hydraulic application. For your convenience, the number of pump pads is indicated by the first numeral after the "AM" designation in the pump drive model numbers. Models AM 232, AM 365, AM 450, and AM 480 also have additional pump pads available on the input side of the pump drives.

Quality Is Standard
  • Cast iron housings
  • Case hardened and ground spur gears, except AM 110, AM 220, AM 330, AM 216 and AM 320 where gears are shaved
  • Ball bearings
  • Case hardened shafts
  • Viton seals on input shaft
  • Output rotation opposite the direction of input rotation
  • Gear ratios identical on all outputs for each model, except AM 640 which may have different ratios on outputs
  • Modular design

LOAD CLASSIFICATIONS BASED UPON AGMA LOAD CHARACTERISTICS

PRIME MOVER DURATION
OF SERVICE		 DRIVEN MACHINE LOAD
CLASSIFICATIONS
UNIFORM MODERATE SHOCK HEAVY SHOCK
Electric Motor Up to 3 hours per day
3-10 hours per day
Over 10 hours per day		 1.00
1.00
1.25		 1.25
1.25
1.50		 1.50
1.75
2.00
Multi-cylinder
internal
combustion engine		 Up to 3 hours per day
3-10 hours per day
Over 10 hours per day		 1.00
1.25
1.50		 1.25
1.50
1.75		 1.75
2.00
2.25
Multi-cylinder internal
combustion engine
with high torque rise		 Up to 3 hours per day
3-10 hours per day
Over 10 hours per day		 1.50
1.75
2.00		 1.75
2.00
2.25		 2.25
2.50
2.75
Single cylinder internal
combustion engine		 Up to 3 hours per day
3-10 hours per day
Over 10 hours per day		 1.25
1.50
1.75		 1.50
1.75
2.00		 2.00
2.25
2.50

All clutch engagements to be with prime mover below 1000 RPM. High inertia loads may require use of larger clutch.
Contact Twin Disc application engineering department for assistance.

To calculate application torque:
5252 x HP / Engine RPM = Torque

Torque x Load Factor = Application Torque
Use load factor from chart above
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