Lowell Corporation Mechanical Ratchet Clutches, Model 76

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
ImageOpeningPart NumberGear TeethMax TorqueOverrunning SpeedMaterialABCDEFGHJMeasurement Systemhf:att:pa_socket-openinghf:att:pa_gear-teethhf:att:pa_max-torquehf:att:pa_overrunning-speedhf:att:pa_materialhf:att:pa_ahf:att:pa_bhf:att:pa_chf:att:pa_dhf:att:pa_ehf:att:pa_fhf:att:pa_ghf:att:pa_hhf:att:pa_jhf:att:pa_measurement-system
Model 76 Ratchet Clutch - Square Gear Opening
1-7/8" Sq76901-96230242500 lb-ft50 rpmCast Iron, Steel8-3/8"6-1/4"1-7/16"5-1/4"2-1/2"7-1/8"2-1/2"5"17/32"Standard1-7-8-sq242500-lb-ft50-rpmcast-iron steel8-3-86-1-41-7-165-1-42-1-27-1-82-1-2517-32standard
Model 76 Ratchet Clutch - Square Gear Opening
2" Sq76901-96232242500 lb-ft50 rpmCast Iron, Steel8-3/8"6-1/4"1-7/16"5-1/4"2-1/2"7-1/8"2-1/2"5"17/32"Standard2-sq242500-lb-ft50-rpmcast-iron steel8-3-86-1-41-7-165-1-42-1-27-1-82-1-2517-32standard
Model 76 Ratchet Clutch - Square Gear Opening
2-1/4" Sq76901-96236242500 lb-ft50 rpmCast Iron, Steel8-3/8"6-1/4"1-7/16"5-1/4"2-1/2"7-1/8"2-1/2"5"17/32"Standard2-1-4-sq242500-lb-ft50-rpmcast-iron steel8-3-86-1-41-7-165-1-42-1-27-1-82-1-2517-32standard
Model 76 Ratchet Clutch - Square Gear Opening
2-3/8" Sq76901-96238242500 lb-ft50 rpmCast Iron, Steel8-3/8"6-1/4"1-7/16"5-1/4"2-1/2"7-1/8"2-1/2"5"17/32"Standard2-3-8-sq242500-lb-ft50-rpmcast-iron steel8-3-86-1-41-7-165-1-42-1-27-1-82-1-2517-32standard
Model 76 Ratchet Clutch - Square Gear Opening
2-1/2" Sq76901-96240242500 lb-ft50 rpmCast Iron, Steel8-3/8"6-1/4"1-7/16"5-1/4"2-1/2"7-1/8"2-1/2"5"17/32"Standard2-1-2-sq242500-lb-ft50-rpmcast-iron steel8-3-86-1-41-7-165-1-42-1-27-1-82-1-2517-32standard
Model 76 Ratchet Clutch - Square Gear Opening
47 mm Sq76901-M6247242500 lb-ft50 rpmCast Iron, Steel8-3/8"6-1/4"1-7/16"5-1/4"2-1/2"7-1/8"2-1/2"5"17/32"Metric47-mm-sq242500-lb-ft50-rpmcast-iron steel8-3-86-1-41-7-165-1-42-1-27-1-82-1-2517-32metric
Model 76 Ratchet Clutch - Square Gear Opening
50 mm Sq76901-M6250242500 lb-ft50 rpmCast Iron, Steel8-3/8"6-1/4"1-7/16"5-1/4"2-1/2"7-1/8"2-1/2"5"17/32"Metric50-mm-sq242500-lb-ft50-rpmcast-iron steel8-3-86-1-41-7-165-1-42-1-27-1-82-1-2517-32metric
Model 76 Ratchet Clutch - Square Gear Opening
60 mm Sq76901-M6260242500 lb-ft50 rpmCast Iron, Steel8-3/8"6-1/4"1-7/16"5-1/4"2-1/2"7-1/8"2-1/2"5"17/32"Metric60-mm-sq242500-lb-ft50-rpmcast-iron steel8-3-86-1-41-7-165-1-42-1-27-1-82-1-2517-32metric
Model 76 Ratchet Clutch - Square Gear Opening
65 mm Sq76901-M6265242500 lb-ft50 rpmCast Iron, Steel8-3/8"6-1/4"1-7/16"5-1/4"2-1/2"7-1/8"2-1/2"5"17/32"Metric65-mm-sq242500-lb-ft50-rpmcast-iron steel8-3-86-1-41-7-165-1-42-1-27-1-82-1-2517-32metric
Model 76 Ratchet Clutch - Hex Gear Opening
1-11/16" Hex76901-96327242500 lb-ft50 rpmCast Iron, Steel8-3/8"6-1/4"1-7/16"5-1/4"2-1/2"7-1/8"2-1/2"5"17/32"Standard1-11-16-hex242500-lb-ft50-rpmcast-iron steel8-3-86-1-41-7-165-1-42-1-27-1-82-1-2517-32standard
Model 76 Ratchet Clutch - Hex Gear Opening
2-3/8" Hex76901-96338242500 lb-ft50 rpmCast Iron, Steel8-3/8"6-1/4"1-7/16"5-1/4"2-1/2"7-1/8"2-1/2"5"17/32"Standard2-3-8-hex242500-lb-ft50-rpmcast-iron steel8-3-86-1-41-7-165-1-42-1-27-1-82-1-2517-32standard
Model 76 Ratchet Clutch - Hex Gear Opening
2-1/2" Hex76901-96340242500 lb-ft50 rpmCast Iron, Steel8-3/8"6-1/4"1-7/16"5-1/4"2-1/2"7-1/8"2-1/2"5"17/32"Standard2-1-2-hex242500-lb-ft50-rpmcast-iron steel8-3-86-1-41-7-165-1-42-1-27-1-82-1-2517-32standard
Model 76 Ratchet Clutch - Hex Gear Opening
2-9/16" Hex76901-96341242500 lb-ft50 rpmCast Iron, Steel8-3/8"6-1/4"1-7/16"5-1/4"2-1/2"7-1/8"2-1/2"5"17/32"Standard2-9-16-hex242500-lb-ft50-rpmcast-iron steel8-3-86-1-41-7-165-1-42-1-27-1-82-1-2517-32standard
Model 76 Ratchet Clutch - Hex Gear Opening
2-5/8" Hex76901-96342242500 lb-ft50 rpmCast Iron, Steel8-3/8"6-1/4"1-7/16"5-1/4"2-1/2"7-1/8"2-1/2"5"17/32"Standard2-5-8-hex242500-lb-ft50-rpmcast-iron steel8-3-86-1-41-7-165-1-42-1-27-1-82-1-2517-32standard
Model 76 Ratchet Clutch - Hex Gear Opening
2-3/4" Hex76901-96344242500 lb-ft50 rpmCast Iron, Steel8-3/8"6-1/4"1-7/16"5-1/4"2-1/2"7-1/8"2-1/2"5"17/32"Standard2-3-4-hex242500-lb-ft50-rpmcast-iron steel8-3-86-1-41-7-165-1-42-1-27-1-82-1-2517-32standard
Model 76 Ratchet Clutch - Hex Gear Opening
2-15/16" Hex76901-96347242500 lb-ft50 rpmCast Iron, Steel8-3/8"6-1/4"1-7/16"5-1/4"2-1/2"7-1/8"2-1/2"5"17/32"Standard2-15-16-hex242500-lb-ft50-rpmcast-iron steel8-3-86-1-41-7-165-1-42-1-27-1-82-1-2517-32standard
Model 76 Ratchet Clutch - Hex Gear Opening
3" Hex76901-96348242500 lb-ft50 rpmCast Iron, Steel8-3/8"6-1/4"1-7/16"5-1/4"2-1/2"7-1/8"2-1/2"5"17/32"Standard3-hex242500-lb-ft50-rpmcast-iron steel8-3-86-1-41-7-165-1-42-1-27-1-82-1-2517-32standard
Model 76 Ratchet Clutch - Hex Gear Opening
3-1/8" Hex76901-96350242500 lb-ft50 rpmCast Iron, Steel8-3/8"6-1/4"1-7/16"5-1/4"2-1/2"7-1/8"2-1/2"5"17/32"Standard3-1-8-hex242500-lb-ft50-rpmcast-iron steel8-3-86-1-41-7-165-1-42-1-27-1-82-1-2517-32standard
Model 76 Ratchet Clutch - Hex Gear Opening
3-1/4" Hex76901-96352242500 lb-ft50 rpmCast Iron, Steel8-3/8"6-1/4"1-7/16"5-1/4"2-1/2"7-1/8"2-1/2"5"17/32"Standard3-1-4-hex242500-lb-ft50-rpmcast-iron steel8-3-86-1-41-7-165-1-42-1-27-1-82-1-2517-32standard
Model 76 Ratchet Clutch - Hex Gear Opening
42 mm Hex76901-M6342242500 lb-ft50 rpmCast Iron, Steel8-3/8"6-1/4"1-7/16"5-1/4"2-1/2"7-1/8"2-1/2"5"17/32"Metric42-mm-hex242500-lb-ft50-rpmcast-iron steel8-3-86-1-41-7-165-1-42-1-27-1-82-1-2517-32metric
Model 76 Ratchet Clutch - Hex Gear Opening
60 mm Hex76901-M6360242500 lb-ft50 rpmCast Iron, Steel8-3/8"6-1/4"1-7/16"5-1/4"2-1/2"7-1/8"2-1/2"5"17/32"Metric60-mm-hex242500-lb-ft50-rpmcast-iron steel8-3-86-1-41-7-165-1-42-1-27-1-82-1-2517-32metric
Model 76 Ratchet Clutch - Hex Gear Opening
65 mm Hex76901-M6365242500 lb-ft50 rpmCast Iron, Steel8-3/8"6-1/4"1-7/16"5-1/4"2-1/2"7-1/8"2-1/2"5"17/32"Metric65-mm-hex242500-lb-ft50-rpmcast-iron steel8-3-86-1-41-7-165-1-42-1-27-1-82-1-2517-32metric
Model 76 Ratchet Clutch - Hex Gear Opening
70 mm Hex76901-M6370242500 lb-ft50 rpmCast Iron, Steel8-3/8"6-1/4"1-7/16"5-1/4"2-1/2"7-1/8"2-1/2"5"17/32"Metric70-mm-hex242500-lb-ft50-rpmcast-iron steel8-3-86-1-41-7-165-1-42-1-27-1-82-1-2517-32metric
Model 76 Ratchet Clutch - Hex Gear Opening
75 mm Hex76901-M6375242500 lb-ft50 rpmCast Iron, Steel8-3/8"6-1/4"1-7/16"5-1/4"2-1/2"7-1/8"2-1/2"5"17/32"Metric75-mm-hex242500-lb-ft50-rpmcast-iron steel8-3-86-1-41-7-165-1-42-1-27-1-82-1-2517-32metric
Model 76 Ratchet Clutch - Hex Gear Opening
80 mm Hex76901-M6380242500 lb-ft50 rpmCast Iron, Steel8-3/8"6-1/4"1-7/16"5-1/4"2-1/2"7-1/8"2-1/2"5"17/32"Metric80-mm-hex242500-lb-ft50-rpmcast-iron steel8-3-86-1-41-7-165-1-42-1-27-1-82-1-2517-32metric