Mechanical Ratchet Clutches

Lowell Corporation Mechanical Ratchet Clutches

Rugged and reliable for heavy-duty applications
Lowell ratchet clutches are designed from standard bodies, gears, pawls, and springs. Forces are applied in an optimum manner between the solid steel gear and hefty pawl so that loads are in compression rather than in shear. Gears are a low-carbon steel. Rugged tooth design as large contact area with pawl.

  • Mounting holes provided in body
  • Keyways are per ANSI/ASME B17.1
  • Lubrication is recommended after every 1200 hours of operation
  • Specials may be ordered with size, shape, and tooth arrangements of your choice
  • Fully locked neutral position
  • Free running neutral position available on request
  • Durable, cast iron construction
  • Custom models available
  • 100% made in USA

Use these service factors with the Torque Ratings to determine the correct size Ratchet Clutch for your application.


Service Condition Service Factor
Light load pickup, no shock during operation 1.0 X Rated Torque
Medium load pickup, medium shock during operation 0.5 X Rated Torque
Heavy load pickup, medium shock during operation 0.3 X Rated Torque
Sudden load pickup, heavy shock during operation 0.2 X Rated Torque