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Shaft Orientation Shaft Orientation | Show |
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 | Parallel |
Shaft Orientation Shaft Orientation | Hide |
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| Right Angle | Parallel |
Input Connection Type Input Connection Type |
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 | Shaft Opening |
Output Connection Type Output Connection Type |
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 | Shaft |
Output Shaft Type Output Shaft Type |
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 | Keyed |
 | D-Profile |
 | Round with Through Hole |
Maximum Input Horsepower Maximum Input Horsepower |
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Number of Output Shafts Number of Output Shafts |
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 | 1 |
Maximum Output Torque @ Input Speed Maximum OutputTorque @ Input Speed |
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Output Shaft Material Output Shaft Material |
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Maximum Output Speed Maximum Output Speed |
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Input Shaft Rotation Input Shaft Rotation |
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Gear Material Gear Material |
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Efficiency @ Input Speed Efficiency @ Input Speed |
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Mounting Orientation Mounting Orientation |
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Radial Load Capacity Radial Load Capacity |
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Speed Reducers for Position- and Speed-Control Motors
Pair these speed reducers with stepper and servo motors in position- and speed-control applications. Helical gears provide exact positioning and smoother travel than our other speed reducers. Attach to a motor to transmit motion parallel to the motor shaft while reducing speed and increasing torque. They meet IP65 for protection from washdowns.
Radial loads are loads that are perpendicular to the shaft. They’re commonly caused by components attached to shaft, such as pulleys and sprockets.
For technical drawings and 3-D models, click on a part number.
Max. Output | Max. Input | Output Shaft | Overall | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Speed Ratio | Torque | Speed, rpm | Speed, rpm | hp | For Input Shaft Dia. | Dia. | Lg. | Lg. | Wd. | Ht. | Radial Load Capacity, lbs. | Each | |
For NEMA 23 Motor | |||||||||||||
| 3:1 | 240 in.-lbs. @ 1,750 rpm | 2,000 | 6,000 | 2.89 | 1/4" | 0.38" | 1" | 4 1/2" | 2 1/2" | 2 1/2" | 348 | 00000000 | 0000000 |
| 5:1 | 345 in.-lbs. @ 1,750 rpm | 1,200 | 6,000 | 3.24 | 1/4" | 0.38" | 1" | 4 1/2" | 2 1/2" | 2 1/2" | 348 | 00000000 | 000000 |
| 10:1 | 265 in.-lbs. @ 1,750 rpm | 600 | 6,000 | 1.45 | 1/4" | 0.38" | 1" | 4 1/2" | 2 1/2" | 2 1/2" | 348 | 00000000 | 000000 |
| 20:1 | 345 in.-lbs. @ 1,750 rpm | 300 | 6,000 | 1.08 | 1/4" | 0.38" | 1" | 5 3/4" | 2 1/2" | 2 1/2" | 348 | 00000000 | 00000000 |
| 50:1 | 345 in.-lbs. @ 1,750 rpm | 120 | 6,000 | 0.46 | 1/4" | 0.38" | 1" | 5 3/4" | 2 1/2" | 2 1/2" | 348 | 00000000 | 00000000 |
For NEMA 34 Motor | |||||||||||||
| 3:1 | 743 in.-lbs. @ 1,750 rpm | 1,833 | 5,500 | 6.75 | 1/2" | 1/2" | 1.25" | 5 1/4" | 3 1/2" | 3 1/2" | 630 | 00000000 | 00000000 |
| 5:1 | 867 in.-lbs. @ 1,750 rpm | 1,100 | 5,500 | 5.73 | 1/2" | 1/2" | 1.25" | 5 1/4" | 3 1/2" | 3 1/2" | 630 | 00000000 | 00000000 |
| 10:1 | 797 in.-lbs. @ 1,750 rpm | 550 | 5,500 | 3.04 | 1/2" | 1/2" | 1.25" | 5 1/4" | 3 1/2" | 3 1/2" | 630 | 00000000 | 00000000 |
| 20:1 | 867 in.-lbs. @ 1,750 rpm | 275 | 5,500 | 1.97 | 1/2" | 1/2" | 1.25" | 7" | 3 1/2" | 3 1/2" | 630 | 00000000 | 00000000 |
| 50:1 | 867 in.-lbs. @ 1,750 rpm | 110 | 5,500 | 0.87 | 1/2" | 1/2" | 1.25" | 7" | 3 1/2" | 3 1/2" | 630 | 00000000 | 00000000 |
Speed Reducers for Face-Mount AC Motors
Mount these speed reducers to a NEMA motor. They transmit motion parallel to the motor shaft while reducing speed and increasing torque. Spur gears minimize torque loss between your motor and drive shaft, making these speed reducers more efficient than our other speed reducers. All require lubrication (not included).
Radial loads are loads that are perpendicular to the shaft. They’re commonly caused by components attached to shaft, such as pulleys and sprockets.
For technical drawings and 3-D models, click on a part number.
Speed Reducers | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Max. Output | Max. Input | Output Shaft | Overall | 1 qt. Lubricant | ||||||||||||
| Speed Ratio | Torque | Speed, rpm | Speed, rpm | hp | For Input Shaft Dia. | Dia. | Lg. | Center-to-Center Shaft Distance | Lg. | Wd. | Ht. | Radial Load Capacity, lbs. | Each | Each | ||
For NEMA 48N Motor | ||||||||||||||||
| 2.6:1 | 136 in.-lbs. @ 1,750 rpm | 665 | 1,750 | 1.48 | 1/2" | 7/8" | 2.47" | 1.19" | 6 1/2" | 8" | 6 3/4" | Not Rated | 0000000 | 0000000 | 000000 | 00 |
| 3.2:1 | 167 in.-lbs. @ 1,750 rpm | 547 | 1,750 | 1.48 | 1/2" | 7/8" | 2.47" | 1.19" | 6 1/2" | 8" | 6 3/4" | Not Rated | 00000000 | 000000 | 000000 | 00 |
| 3.9:1 | 204 in.-lbs. @ 1,750 rpm | 448 | 1,750 | 1.48 | 1/2" | 7/8" | 2.47" | 1.19" | 6 1/2" | 8" | 6 3/4" | Not Rated | 00000000 | 000000 | 000000 | 00 |
| 4.8:1 | 249 in.-lbs. @ 1,750 rpm | 364 | 1,750 | 1.48 | 1/2" | 7/8" | 2.47" | 1.19" | 6 1/2" | 8" | 6 3/4" | Not Rated | 00000000 | 000000 | 000000 | 00 |
| 5.6:1 | 290 in.-lbs. @ 1,750 rpm | 315 | 1,750 | 1.48 | 1/2" | 7/8" | 2.47" | 1.19" | 6 1/2" | 8" | 6 3/4" | Not Rated | 00000000 | 000000 | 000000 | 00 |
| 6.5:1 | 286 in.-lbs. @ 1,750 rpm | 270 | 1,750 | 1.25 | 1/2" | 7/8" | 2.47" | 1.19" | 6 1/2" | 8" | 6 3/4" | Not Rated | 00000000 | 000000 | 000000 | 00 |
| 7.6:1 | 288 in.-lbs. @ 1,750 rpm | 229 | 1,750 | 1.07 | 1/2" | 7/8" | 2.47" | 1.19" | 6 1/2" | 8" | 6 3/4" | Not Rated | 00000000 | 000000 | 000000 | 00 |
| 9.1:1 | 289 in.-lbs. @ 1,750 rpm | 192 | 1,750 | 0.9 | 1/2" | 7/8" | 2.47" | 1.19" | 6 1/2" | 8" | 6 3/4" | Not Rated | 00000000 | 000000 | 000000 | 00 |
| 10.1:1 | 182 in.-lbs. @ 1,750 rpm | 172 | 1,750 | 0.5 | 1/2" | 5/8" | 2.03" | __ | 7 3/4" | 8 1/4" | 6 3/4" | Not Rated | 00000000 | 000000 | 000000 | 00 |
| 11.1:1 | 293 in.-lbs. @ 1,750 rpm | 158 | 1,750 | 0.75 | 1/2" | 7/8" | 2.47" | 1.19" | 6 1/2" | 8" | 6 3/4" | Not Rated | 00000000 | 000000 | 000000 | 00 |
For NEMA 56C Motor | ||||||||||||||||
| 2.6:1 | 136 in.-lbs. @ 1,750 rpm | 665 | 1,750 | 1.48 | 5/8" | 7/8" | 2.47" | 1.19" | 7" | 8 1/4" | 6 3/4" | Not Rated | 000000 | 000000 | 000000 | 00 |
| 3.2:1 | 167 in.-lbs. @ 1,750 rpm | 547 | 1,750 | 1.48 | 5/8" | 7/8" | 2.47" | 1.19" | 7" | 8 1/4" | 6 3/4" | 256 | 0000000 | 000000 | 000000 | 000000 |
| 3.9:1 | 204 in.-lbs. @ 1,750 rpm | 448 | 1,750 | 1.48 | 5/8" | 7/8" | 2.47" | 1.19" | 7" | 8 1/4" | 6 3/4" | 253 | 0000000 | 000000 | 000000 | 00000 |
| 4.8:1 | 249 in.-lbs. @ 1,750 rpm | 364 | 1,750 | 1.48 | 5/8" | 7/8" | 2.47" | 1.19" | 7" | 8 1/4" | 6 3/4" | 249 | 0000000 | 000000 | 000000 | 00000 |
| 5.6:1 | 290 in.-lbs. @ 1,750 rpm | 315 | 1,750 | 1.48 | 5/8" | 7/8" | 2.47" | 1.19" | 7" | 8 1/4" | 6 3/4" | 246 | 0000000 | 000000 | 000000 | 00000 |
| 6.5:1 | 286 in.-lbs. @ 1,750 rpm | 270 | 1,750 | 1.25 | 5/8" | 7/8" | 2.47" | 1.19" | 7" | 8 1/4" | 6 3/4" | Not Rated | 00000000 | 000000 | 000000 | 00 |
| 7.6:1 | 288 in.-lbs. @ 1,750 rpm | 229 | 1,750 | 1.07 | 5/8" | 7/8" | 2.47" | 1.19" | 7" | 8 1/4" | 6 3/4" | 237 | 0000000 | 000000 | 000000 | 00000 |
| 9.1:1 | 289 in.-lbs. @ 1,750 rpm | 192 | 1,750 | 0.9 | 5/8" | 7/8" | 2.47" | 1.19" | 7" | 8 1/4" | 6 3/4" | Not Rated | 00000000 | 000000 | 000000 | 00 |
| 10.1:1 | 182 in.-lbs. @ 1,750 rpm | 172 | 1,750 | 0.5 | 5/8" | 5/8" | 2.03" | __ | 7 3/4" | 8 1/4" | 6 3/4" | Not Rated | 00000000 | 000000 | 000000 | 00 |
| 11.1:1 | 293 in.-lbs. @ 1,750 rpm | 158 | 1,750 | 0.75 | 5/8" | 7/8" | 2.47" | 1.19" | 7" | 8 1/4" | 6 3/4" | 242 | 0000000 | 000000 | 000000 | 00000 |
For NEMA 56N Motor | ||||||||||||||||
| 2.6:1 | 136 in.-lbs. @ 1,750 rpm | 665 | 1,750 | 1.48 | 5/8" | 7/8" | 2.47" | 1.19" | 6 1/2" | 8" | 6 3/4" | Not Rated | 00000000 | 000000 | 000000 | 00 |
| 3.2:1 | 167 in.-lbs. @ 1,750 rpm | 547 | 1,750 | 1.48 | 5/8" | 7/8" | 2.47" | 1.19" | 6 1/2" | 8" | 6 3/4" | Not Rated | 00000000 | 000000 | 000000 | 00 |
| 3.9:1 | 204 in.-lbs. @ 1,750 rpm | 448 | 1,750 | 1.48 | 5/8" | 7/8" | 2.47" | 1.19" | 6 1/2" | 8" | 6 3/4" | Not Rated | 00000000 | 000000 | 000000 | 00 |
| 4.8:1 | 249 in.-lbs. @ 1,750 rpm | 364 | 1,750 | 1.48 | 5/8" | 7/8" | 2.47" | 1.19" | 6 1/2" | 8" | 6 3/4" | Not Rated | 00000000 | 000000 | 000000 | 00 |
| 5.6:1 | 290 in.-lbs. @ 1,750 rpm | 315 | 1,750 | 1.48 | 5/8" | 7/8" | 2.47" | 1.19" | 6 1/2" | 8" | 6 3/4" | Not Rated | 00000000 | 000000 | 000000 | 00 |
| 6.5:1 | 286 in.-lbs. @ 1,750 rpm | 270 | 1,750 | 1.25 | 5/8" | 7/8" | 2.47" | 1.19" | 6 1/2" | 8" | 6 3/4" | Not Rated | 00000000 | 000000 | 000000 | 00 |
| 7.6:1 | 288 in.-lbs. @ 1,750 rpm | 229 | 1,750 | 1.07 | 5/8" | 7/8" | 2.47" | 1.19" | 6 1/2" | 8" | 6 3/4" | Not Rated | 00000000 | 000000 | 000000 | 00 |
| 9.1:1 | 289 in.-lbs. @ 1,750 rpm | 192 | 1,750 | 0.9 | 5/8" | 7/8" | 2.47" | 1.19" | 6 1/2" | 8" | 6 3/4" | Not Rated | 00000000 | 000000 | 000000 | 00 |
| 11.1:1 | 293 in.-lbs. @ 1,750 rpm | 158 | 1,750 | 0.75 | 5/8" | 7/8" | 2.47" | 1.19" | 6 1/2" | 8" | 6 3/4" | Not Rated | 00000000 | 000000 | 000000 | 00 |
The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)