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GMN Sprag Clutches, also known as one-way bearings and freewheel clutches, can be used in backstopping, indexing, and overrunning applications. Our clutches are great for applications with varying torque capacities and RPM limits.

We stock GMN one-way bearings at our Houston, TX location. Our in-house engineers are here to help you find the clutch that best fits your application.

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GMN Sprag Clutch Product Lines

Our sprag clutches support a range of torque capacities and load sizes. Browse our product lines below and give us a call for more information!

GMN Bearing USA is the only authorized distributor of GMN products in the USA.

Complete Sprag Clutch Units

Complete Sprag Clutch Units

High Torque Capacity Clutches

These complete units are designed with built-in roller bearings and ball bearings making it the most powerful and robust clutch in our product line. Therefore, this is great for machines that require a heavy load and high torque from the clutch.

The torque capacity of these is 53 to 588 Mn, and they have a bore (ID) size of 10 to 60 mm (0.393 to 2.362 in).

We stock GMN’s FP, FPD, FN, and FND series sprag clutch units.

Specs at a glance:

  • Clutch Width (mm): 27 (open) or 34 (sealed)
  • Operating Temperature: 212°F (100°C) or 284°F (140°C)
  • ID Size Range (mm): 10 to 60
  • OD Size Range (mm): 31 to 110
  • Torque (Nm): 60 to 588
  • Inner Ring: Press Fit and/or Keyway
  • Outer Ring: Press fit and/or Mounting Tab
  • Bearing Style: Integrated Ball and Roller Bearings
  • Lubrication: Oil or Grease
  • Seals: Rubber Seals or No Seals

Browse our Complete Sprag Clutch Units

Ball Bearing Sprag Clutch Units

Ball Bearing Sprag Clutch Units

Low to Med Torque Capacity. Our Most Popular Clutch Line.

These ball-bearing clutches are economical and are designed with ball bearings only. They don’t have roller bearings like the complete units.

Similarly, the sizes are matched to 6200 radial ball bearings and most importantly, this product line is a good choice for low to medium torque requirements.

Torque capacity of our ball bearing clutches is 53 to 267 Mn, and the bore (ID) size ranges from 17 to 40 mm (0.669 to 1.57 in).

We stock GMN’s FK, FKN, and FKNN series ball bearing clutches.

Specs at a glance:

  • Clutch Width (mm): 12 to 18
  • Operating Temperature: 284°F (140°C) or on request, 338°F (170°C)
  • ID Size Range (mm): 17 to 40
  • OD Size Range (mm): 40 to 80
  • Torque (Nm): 53 to 267
  • Inner Ring: Press Fit and/or Keyway
  • Outer Ring: Press fit and/or Keyway
  • Bearing Style: Integrated Ball Bearing
  • Lubrication: Grease
  • Seals: Rubber Seals or No Seals

Browse our Ball Bearing Clutches

Sprag Clutch Elements

Sprag Clutch Elements

Low to High Torque Capacity.

Our 400 series one-way bearing element comes with either mounting rings or without. The components consist of a cage, sprags, and a spring.The FE 400 series is a great option if you need a large number of clutches but can’t sacrifice torque requirements.

These bearings are good for large orders and low to high torque needs (1 to 2673 Nm). The bore (ID) size varies from 2 to 240 mm (0.078 to 9.448 in).

Specs at a glance:

  • Clutch Width (mm): 7 or 12
  • Operating Temperature: Max 338°F (170°C)
  • ID Size Range (mm): 2 to 240
  • OD Size Range (mm): 10 to 236
  • Torque (Nm): 4 to 14,060
  • Inner Ring: Press Fit and/or Keyway
  • Outer Ring: Press fit
  • Bearing Style: N/A
  • Lubrication: Oil or Grease
  • Spring Types: Tension or Meander
  • Cage Material: Steel or Plastic

Learn more about GMN’s 400 Series

Backstopping Clutch

Backstopping Clutch

Also known as a hold-back clutch, our backstopping clutches prevent component rotation from moving in a reverse direction. This is a great option for high torque applications.

We stock GMN’s RA series backstopping clutches.

Browse our Backstopping Clutches

Roller Ramp Clutches

Roller Ramp Clutches

We offer roller ramp clutches for heavy duty applications. Our VS, VSNU, VF, VGF, VGV, VGL(P) and VEK series vary in support and sizes.

Browse all Roller Ramp Clutches

FE 8000 Series

FE 8000 Series

Our FE 8000 series are among our most popular high torque capacity clutches. The FE 8000 series offers the highest torque capacity with no RPM limits.

Learn more about our FE 8000 Series

Questions to Consider When Choosing a One-Way Bearing

Before choosing your clutch, you need to know a few key pieces of information.

  • What’s driving the force? Electric motor, engine, etc.
  • How will you be using the clutch? Backstopping, overrunning or indexing?
  • How much torque will be transmitted/needed?
  • What is your shaft diameter or bore size?
  • Environment temperature while in operation.
  • Will you need grease or oil lubrication?

If you aren’t certain what sprag clutch will be best for your unique application, give our team a call!

Contact Us

Sprag Clutch FAQs

How Do Sprag Clutches Work?
  • Insert elements are the components inside a sprag clutch and contain a cage, sprags and a spring.
  • The number of sprags in an insert element is determined by the size of the shaft. The spring preloads the friction between those sprags and parts.
  • These insert elements are not self-centering and require additional bearing support for proper function, which both our complete sprag units and ball bearing units provide.
  • To learn more, check out our Sprag Clutch Guide!
What are the benefits of buying one-way sprags from GMN?
  • The design of our GMN sprag clutches offers some key benefits for our customers:
    • Our clutches are manufactured with small sprags which makes them light, compact (space-saver) and allows high indexing frequencies.
    • Optimized design of the clamping curve allows our sprags to operate with high production and indexing accuracy.

Contact GMN Bearing USA for Quality Sprag Clutches!

Our bearing engineers provide best in class support to help you improve your application with GMN clutches. Contact us or request a quote today!

Request A Quote

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