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Single Reduction
Worm Gear Reducers
Double Reduction
Worm - Worm Gear Reducers
Double Reduction
Helical - Worm Gear Reducers
WASHGUARD
®
Reducers
and GEAR+MOTOR™
Ratio Multipliers
Accessories and
Additional
Capabilities
www.grovegear.com195
Maximum Rating Tables
GR, NH & EL Series • All Stock Styles
Sizes 821, 824 and 826 • 1.0 S.F.
Size 821
Size 824
Size 826
Nominal
Nominal
Input
Output
Input
Output Output Exact
Input
Output Output Exact
Input
Output Output Exact
Ratio RPM RPM HP
HP TQ Total
HP
HP TQ Total
HP
HP TQ Total
(lb-in)
Ratio*
(lb-in)
Ratio*
(lb-in) Ratio*
10
1750 175.0 2.010 1.803 668 10.00 3.619 3.268 1177 10.00 3.962 3.589 1336 10.00
15
1750 116.7 1.798 1.577 876 15.00 2.708 2.403 1298 15.00 3.414 3.029 1636 15.00
20
1750 87.5 1.548 1.334 988 20.00 2.352 2.052 1478 20.00 3.016 2.633 1897 20.00
25
1750 70.0 1.030 0.874 806 25.00 1.812 1.562 1406 25.00 2.337 2.025 1823 25.00
30
1750 58.3 1.189 0.984 1093 30.00 1.783 1.524 1598 30.00 2.299 1.968 2064 30.00
40
1750 43.8 0.926 0.760 1093 40.00 1.401 1.165 1676 40.00 1.812 1.510 2173 40.00
45
1750 40.1 0.909 0.733 1159 43.69 1.391 1.131 1778 43.69 1.784 1.464 2303 43.69
50
1750 35.0 0.765 0.608 1120 50.00 1.171 0.955 1721 50.00 1.517 1.242 2236 50.00
60
1750 29.2 0.719 0.558 1204 60.00 1.100 0.863 1862 60.00 1.506 1.177 2469 60.00
75
1750 23.3 0.598 0.446 1233 75.00 0.927 0.707 1910 75.00 1.182 0.911 2461 75.00
80
1750 21.9 0.518 0.357 1318 80.00 0.944 0.692 1991 80.00 1.197 0.898 2584 80.00
100
1750 17.5 0.523 0.358 1286 100.00 0.808 0.559 2011 100.00 1.012 0.736 2649 100.00
125
1750 14.0 0.441 0.285 1313 125.00 0.688 0.457 2059 125.00 0.859 0.588 2649 125.00
150
1750 11.7 0.390 0.239 1320 150.00 0.597 0.379 2045 150.00 0.751 0.488 2636 150.00
200
1750 8.8 0.334 0.179 1322 200.00 0.508 0.284 2048 200.00 0.633 0.369 2660 200.00
250
1750 7.0 0.288 0.140 1289 250.00 0.443 0.224 2021 250.00 0.544 0.289 2600 250.00
300
1750 6.1 0.269 0.126 1356 287.28 0.407 0.204 2110 287.28 0.477 0.233 2519 287.28
400
1750 4.4 0.100 0.048 710 400.00 0.176 0.092 1428 400.00 0.237 0.127 1964 400.00
500
1750 3.5 0.810 0.032 590 500.00 0.110 0.049 877 500.00 0.137 0.064 1157 500.00
600
1750 3.0 0.073 0.034 724 574.56 0.122 0.056 1164 574.56 0.154 0.075 1542 574.56
* Actual ratio combinations supplied by Factory may vary from above depending on application and manufacturing requirements.
Refer to page 201 for exact ratio of helical primary stage and worm gear secondary stage.
At speeds above 1750 input RPM, gear reducers may become thermally limited. For continuous operation,
limit input HP to 1750 RPM input ratings shown. Contact Factory with application requirements if higher speeds are required.
For input/ output shaft overhung load and thrust load ratings, refer to pages 419-422.