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DFARS Specialty Metals
Gear Module
Rotary Speed Limiters
Install these rotary speed limiters at the hinges of small lids, doors, and access panels for smooth, quiet motion. They're often used in electronics applications.
Speed limiters with a 105°, 110°, or 130° rotation angle are commonly used for small movements, such as closing lids.
Speed limiters with a 360° rotation angle are often used to move small hoods, flaps, and fans. A cycle is one shaft rotation.
Dual direction speed limiters dampen motion in both directions. Common uses for them include controlling the motion of a switch-activated door and opening and closing a DVD player.
Clockwise and counterclockwise speed limiters dampen motion in the listed direction, moving freely in the opposite direction. Use them in processes that require returning a part to its original position.
Speed limiters with a geared shaft must be used with gears that have the same 20° pressure angle and module.
Speed limiters with adjustable torque have a knob on the back to control damping torque. Use them in applications that require fine tuning.
For technical drawings and 3-D models, click on a part number.
Gearless Shaft
Gearless (A)
Gearless (B)
Gearless (C)
Overall | Shaft | Mount. Holes | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Torque, in.-oz. | Torque Tolerance, in.-oz. | Lg. | Wd. | Ht. | Dia. | Lg. | Wd. | Material | Temp. Range, ° F | Max. Cycles per Minute | Max. Speed, rpm | Material | Dia. | Ctr.-to-Ctr. | Fasteners Included | Each | |
Style A | |||||||||||||||||
360° Dual Direction Rotation | |||||||||||||||||
| 4.32 | -1.11 to 1.12 | 1.08" | 0.59" | 0.55" | 0.16" | 0.18" | 0.14" | Acetal | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.13" | 0.83" | No | 000000 | 000000 |
360° Clockwise Rotation | |||||||||||||||||
| 2.88 | -0.8 to 0.8 | 1.08" | 0.59" | 0.55" | 0.16" | 0.18" | 0.14" | Acetal | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.13" | 0.83" | No | 00000000 | 00000 |
| 4.32 | -1.12 to 1.6 | 1.08" | 0.59" | 0.55" | 0.16" | 0.18" | 0.14" | Acetal | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.13" | 0.83" | No | 00000000 | 00000 |
360° Counterclockwise Rotation | |||||||||||||||||
| 2.88 | -0.8 to 0.8 | 1.08" | 0.59" | 0.55" | 0.16" | 0.18" | 0.14" | Acetal | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.13" | 0.83" | No | 00000000 | 00000 |
| 4.32 | -1.12 to 1.6 | 1.08" | 0.59" | 0.55" | 0.16" | 0.18" | 0.14" | Acetal | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.13" | 0.83" | No | 00000000 | 00000 |
Style B | |||||||||||||||||
360° Dual Direction Rotation | |||||||||||||||||
| 0.14 | -0.064 to 0.064 | 0.75" | 0.39" | 0.24" | 0.1" | 0.12" | 0.08" | Acetal | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.08" | 0.55" | No | 00000000 | 0000 |
| 0.29 | -0.088 to 0.088 | 0.95" | 0.59" | 0.26" | 0.14" | 0.15" | 0.1" | Acetal | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.08" | 0.75" | No | 0000000 | 0000 |
| 0.66 | -0.14 to 0.14 | 0.95" | 0.59" | 0.26" | 0.14" | 0.15" | 0.1" | Acetal | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.08" | 0.75" | No | 0000000 | 0000 |
| 1.41 | -0.28 to 0.28 | 0.95" | 0.59" | 0.26" | 0.14" | 0.15" | 0.1" | Acetal | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.08" | 0.75" | No | 0000000 | 0000 |
| 21 | __ | 1.97" | 0.98" | 0.75" | 0.2" | 0.2" | 0.16" | Acetal | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.17" | 1.57" | No | 0000000 | 00000 |
360° Clockwise Rotation | |||||||||||||||||
| 7 | __ | 1.97" | 0.98" | 0.75" | 0.2" | 0.2" | 0.16" | Acetal | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.17" | 1.57" | No | 00000000 | 00000 |
| 14 | __ | 1.97" | 0.98" | 0.75" | 0.2" | 0.2" | 0.16" | Acetal | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.17" | 1.57" | No | 00000000 | 00000 |
| 21 | __ | 1.97" | 0.98" | 0.75" | 0.2" | 0.2" | 0.16" | Acetal | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.17" | 1.57" | No | 00000000 | 00000 |
360° Counterclockwise Rotation | |||||||||||||||||
| 7 | __ | 1.97" | 0.98" | 0.75" | 0.2" | 0.2" | 0.16" | Acetal | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.17" | 1.57" | No | 00000000 | 00000 |
| 14 | __ | 1.97" | 0.98" | 0.75" | 0.2" | 0.2" | 0.16" | Acetal | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.17" | 1.57" | No | 00000000 | 00000 |
| 21 | __ | 1.97" | 0.98" | 0.75" | 0.2" | 0.2" | 0.16" | Acetal | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.17" | 1.57" | No | 00000000 | 00000 |
Style C | |||||||||||||||||
360° Dual Direction Rotation | |||||||||||||||||
| 70.74 | -14.08 to 14.07 | 1.85" | 1.85" | 1.65" | 0.24" | 0.39" | 0.2" | Steel | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.21" | 1.42" | No | 00000000 | 00000 |
| 141.63 | -28.32 to 28.32 | 1.85" | 1.85" | 1.65" | 0.24" | 0.39" | 0.2" | Steel | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.21" | 1.42" | No | 00000000 | 00000 |
| 283.26 | -56.65 to 56.65 | 1.85" | 1.85" | 1.65" | 0.24" | 0.39" | 0.2" | Steel | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.21" | 1.42" | No | 0000000 | 00000 |
| 424.89 | -113.3 to 113.3 | 1.85" | 1.85" | 1.65" | 0.24" | 0.39" | 0.2" | Steel | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.21" | 1.42" | No | 00000000 | 00000 |
360° Clockwise Rotation | |||||||||||||||||
| 70.74 | -14.08 to 14.07 | 1.85" | 1.85" | 1.65" | 0.24" | 0.39" | 0.2" | Steel | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.21" | 1.42" | No | 00000000 | 00000 |
| 141.63 | -28.32 to 28.32 | 1.85" | 1.85" | 1.65" | 0.24" | 0.39" | 0.2" | Steel | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.21" | 1.42" | No | 00000000 | 00000 |
| 283.26 | -56.65 to 56.65 | 1.85" | 1.85" | 1.65" | 0.24" | 0.39" | 0.2" | Steel | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.21" | 1.42" | No | 00000000 | 00000 |
360° Counterclockwise Rotation | |||||||||||||||||
| 70.74 | -14.08 to 14.07 | 1.85" | 1.85" | 1.65" | 0.24" | 0.39" | 0.2" | Steel | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.21" | 1.42" | No | 00000000 | 00000 |
| 283.26 | -56.65 to 56.65 | 1.85" | 1.85" | 1.65" | 0.24" | 0.39" | 0.2" | Steel | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.21" | 1.42" | No | 00000000 | 00000 |
Geared Shaft
Geared (A)
Geared (B)
Overall | Shaft | Mount. Holes | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Torque, in.-oz. | Torque Tolerance Range, in.-oz. | Lg. | Wd. | Ht. | Dia. | Lg. | Module | Gear Pitch Dia., mm | Gear Material | Temp. Range, ° F | Max. Cycles per Minute | Max. Speed, rpm | Material | Dia. | Ctr.-to-Ctr. | Fasteners Included | Each | |
Style A | ||||||||||||||||||
360° Dual Direction Rotation | ||||||||||||||||||
| 2.88 | -0.8 to 0.8 | 1.08" | 0.59" | 0.55" | 0.16" | 0.18" | 0.8 | 8.8 | Acetal | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.13" | 0.83" | No | 00000000 | 000000 |
| 4.32 | -1.11 to 1.12 | 1.08" | 0.59" | 0.55" | 0.16" | 0.18" | 0.8 | 8.8 | Acetal | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.13" | 0.83" | No | 000000 | 00000 |
360° Clockwise Rotation | ||||||||||||||||||
| 2.88 | -0.8 to 0.8 | 1.08" | 0.59" | 0.55" | 0.16" | 0.18" | 0.8 | 8.8 | Acetal | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.13" | 0.83" | No | 00000000 | 00000 |
| 4.32 | -1.12 to 1.6 | 1.08" | 0.59" | 0.55" | 0.16" | 0.18" | 0.8 | 8.8 | Acetal | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.13" | 0.83" | No | 00000000 | 00000 |
360° Counterclockwise Rotation | ||||||||||||||||||
| 2.88 | -0.8 to 0.8 | 1.08" | 0.59" | 0.55" | 0.16" | 0.18" | 0.8 | 8.8 | Acetal | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.13" | 0.83" | No | 00000000 | 00000 |
| 4.32 | -1.12 to 1.6 | 1.08" | 0.59" | 0.55" | 0.16" | 0.18" | 0.8 | 8.8 | Acetal | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.13" | 0.83" | No | 00000000 | 00000 |
Style B | ||||||||||||||||||
360° Dual Direction Rotation | ||||||||||||||||||
| 0.14 | -0.064 to 0.064 | 0.75" | 0.39" | 0.24" | 0.1" | 0.12" | 0.6 | 6 | Acetal | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.08" | 0.55" | No | 00000000 | 0000 |
| 0.29 | -0.088 to 0.088 | 0.95" | 0.59" | 0.26" | 0.31" | 0.15" | 0.5 | 7 | Acetal | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.08" | 0.75" | No | 0000000 | 0000 |
| 0.66 | -0.14 to 0.14 | 0.95" | 0.59" | 0.26" | 0.31" | 0.15" | 0.5 | 7 | Acetal | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.08" | 0.75" | No | 0000000 | 0000 |
| 1.41 | -0.28 to 0.28 | 0.95" | 0.59" | 0.26" | 0.31" | 0.15" | 0.5 | 7 | Acetal | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.08" | 0.75" | No | 0000000 | 0000 |
| 7 | __ | 1.97" | 0.98" | 0.75" | 0.2" | 0.2" | 1 | 12 | Acetal | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.17" | 1.57" | No | 00000000 | 00000 |
| 21 | __ | 1.97" | 0.98" | 0.75" | 0.2" | 0.2" | 1 | 12 | Acetal | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.17" | 1.57" | No | 00000000 | 00000 |
360° Clockwise Rotation | ||||||||||||||||||
| 7 | __ | 1.97" | 0.98" | 0.75" | 0.2" | 0.2" | 1 | 12 | Acetal | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.17" | 1.57" | No | 00000000 | 00000 |
| 14 | __ | 1.97" | 0.98" | 0.75" | 0.2" | 0.2" | 1 | 12 | Acetal | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.17" | 1.57" | No | 00000000 | 00000 |
| 21 | __ | 1.97" | 0.98" | 0.75" | 0.2" | 0.2" | 1 | 12 | Acetal | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.17" | 1.57" | No | 00000000 | 00000 |
360° Counterclockwise Rotation | ||||||||||||||||||
| 7 | __ | 1.97" | 0.98" | 0.75" | 0.2" | 0.2" | 1 | 12 | Acetal | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.17" | 1.57" | No | 00000000 | 00000 |
| 14 | __ | 1.97" | 0.98" | 0.75" | 0.2" | 0.2" | 1 | 12 | Acetal | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.17" | 1.57" | No | 00000000 | 00000 |
| 21 | __ | 1.97" | 0.98" | 0.75" | 0.2" | 0.2" | 1 | 12 | Acetal | 32° to 122° | Not Rated | 50 | Polycarbonate | 0.17" | 1.57" | No | 00000000 | 00000 |
Small-Diameter Shaft
Small Diameter
Overall | Shaft | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Torque, in.-oz. | Dia. | Ht. | Dia. | Lg. | Wd. | Temp. Range, ° F | Max. Cycles per Minute | Max. Speed | Material | Fasteners Included | Each | |
110° Clockwise Rotation | ||||||||||||
| 141.61 | 0.79" | 1.78" | 0.47" | 0.79" | 0.31" | 23° to 122° | 5 | Not Rated | Thermoplastic | No | 00000000 | 000000 |
| 424.89 | 0.79" | 1.78" | 0.47" | 0.79" | 0.31" | 23° to 122° | Not Rated | 50 rpm | Polycarbonate | No | 00000000 | 00000 |
110° Counterclockwise Rotation | ||||||||||||
| 141.61 | 0.79" | 1.78" | 0.47" | 0.79" | 0.31" | 23° to 122° | 5 | Not Rated | Thermoplastic | No | 00000000 | 00000 |
| 424.89 | 0.79" | 1.86" | 0.47" | 0.79" | 0.31" | 23° to 122° | Not Rated | 50 rpm | Polycarbonate | No | 00000000 | 00000 |
Adjustable-Torque Shaft
Adjustable Torque
Overall | Shaft | Mount. Holes | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Torque, in.-oz. | Lg. | Wd. | Ht. | Dia. | Lg. | Wd. | Material | Temp. Range, ° F | Max. Cycles per Minute | Max. Speed, rpm | Adjustment Style | Material | Dia. | Ctr.-to-Ctr. | Fasteners Included | Each | |
105° Dual Direction Rotation | |||||||||||||||||
| 1,416.43 | 2.6" | 1.77" | 2.56" | 0.31" | 0.71" | 0.24" | Steel | 23° to 122° | Not Rated | 50 | Knob | Zinc | 0.2" | 2.2" | No | 00000000 | 000000 |
105° Clockwise Rotation | |||||||||||||||||
| 1,416.43 | 2.6" | 1.77" | 2.56" | 0.31" | 0.71" | 0.24" | Steel | 23° to 122° | Not Rated | 50 | Knob | Zinc | 0.2" | 2.2" | No | 00000000 | 00000 |
105° Counterclockwise Rotation | |||||||||||||||||
| 1,416.43 | 2.6" | 1.77" | 2.56" | 0.31" | 0.71" | 0.24" | Steel | 23° to 122° | Not Rated | 50 | Knob | Zinc | 0.2" | 2.2" | No | 00000000 | 00000 |
Press Fit for Square Shaft
Press Fit for Square Shaft
Overall | For Shaft | Mount. Holes | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Torque, in.-oz. | Torque Tolerance, in.-oz. | Lg. | Wd. | Ht. | Lg. | Wd. | Insert Material | Temp. Range, ° F | Max. Cycles per Minute | Max. Speed, rpm | Material | Dia. | Ctr.-to-Ctr. | Fasteners Included | Each | |
360° Dual Direction Rotation | ||||||||||||||||
| 283.26 | -42.56 to 42.57 | 2.56" | 1.85" | 0.39" | 0.31" | 0.31" | Nylon | 14° to 122° | Not Rated | 50 | Steel | 0.18" | 2.2" | No | 0000000 | 000000 |
| 665.75 | -70.89 to 70.89 | 3.11" | 2.24" | 0.44" | 0.39" | 0.39" | Nylon | 14° to 122° | Not Rated | 50 | Steel | 0.22" | 2.68" | No | 0000000 | 00000 |
| 949.01 | -99.22 to 99.22 | 3.5" | 2.48" | 0.44" | 0.49" | 0.49" | Nylon | 14° to 122° | Not Rated | 50 | Steel | 0.26" | 2.99" | No | 0000000 | 00000 |
| 1,232.27 | -113.3 to 113.3 | 3.74" | 2.76" | 0.44" | 0.49" | 0.49" | Nylon | 14° to 122° | Not Rated | 50 | Steel | 0.26" | 3.23" | No | 0000000 | 00000 |
130° Clockwise Rotation | ||||||||||||||||
| 1,416.43 | -354.15 to 354.16 | 3.27" | 2.36" | 0.81" | 0.47" | 0.47" | Nylon | 23° to 122° | Not Rated | 50 | Zinc | 0.22" | 2.76" | No | 00000000 | 00000 |
Press Fit for Round Shaft
Press Fit for Round Shaft
Overall | Mount. Holes | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Torque, in.-oz. | Torque Tolerance, in.-oz. | Lg. | Wd. | Ht. | For Shaft Dia. | Insert Material | Temp. Range, ° F | Max. Cycles per Minute | Max. Speed, rpm | Material | Dia. | Ctr.-to-Ctr. | Fasteners Included | Each | |
360° Clockwise Rotation | |||||||||||||||
| 779.05 | -42.56 to 42.57 | 3.11" | 2.24" | 0.44" | 0.39" | Nylon | 14° to 122° | Not Rated | 50 | Steel | 0.22" | 2.68" | No | 00000000 | 000000 |
| 1,203.94 | -113.3 to 113.3 | 3.5" | 2.48" | 0.44" | 0.39" | Nylon | 14° to 122° | Not Rated | 50 | Steel | 0.26" | 2.99" | No | 00000000 | 00000 |
| 1,558.1 | -141.62 to 141.63 | 3.74" | 2.76" | 0.44" | 0.39" | Nylon | 14° to 122° | Not Rated | 50 | Steel | 0.26" | 3.23" | No | 00000000 | 00000 |
360° Counterclockwise Rotation | |||||||||||||||
| 779.05 | -42.56 to 42.57 | 3.11" | 2.24" | 0.44" | 0.39" | Nylon | 14° to 122° | Not Rated | 50 | Steel | 0.22" | 2.68" | No | 00000000 | 00000 |
| 1,203.94 | -113.3 to 113.3 | 3.5" | 2.48" | 0.44" | 0.39" | Nylon | 14° to 122° | Not Rated | 50 | Steel | 0.26" | 2.99" | No | 00000000 | 00000 |
| 1,558.1 | -141.62 to 141.63 | 3.74" | 2.76" | 0.44" | 0.39" | Nylon | 14° to 122° | Not Rated | 50 | Steel | 0.26" | 3.23" | No | 00000000 | 00000 |