Grove Gear Products Catalog 8050

Quick Selections GR • NH • EL Series

1.50 Service Factor Nominal Output

Input Horsepower @ 1750 RPM

Ratio ♠

RPM 1/8 1/6 1/4 1/3 1/2 3/4 1 1-1/2 2

3

5 7-1/2 10

15

20 25

Worm Gear Reducers and GEAR+MOTOR™ Ratio Multipliers 87.5 813 813 813 815 818 821 824 826 830 832** 842 852 N/A N/A N/A 25 70.0 813 813 815 815 821 824 824 830 842 842 852 870 870 880 8100 30 58.3 813 813 815 815 821 824 824 830 832 842 852 852 N/A N/A N/A 40 43.8 813 813 815 818 821 824 826 832 842 842 852 N/A N/A N/A N/A 45 38.9 813 813 815 821 821 824 826 832 842 842 852 N/A N/A N/A N/A 50 35.0 813 813 818 821 824 826 830 832 842 842 852 870 880 8100 8100 60 29.2 813 815 818 821 824 826 830 832** 842 852 852 N/A N/A N/A 75 23.3 813 815 821 821 824 830 832 842 842 852 870 880 8100 8100 80 21.9 813 815 821 824 824 830 832 842 842 852 N/A N/A N/A 100 17.5 815 815 821 824 826 830* 832** 842 842 852 870 8100 8100 125 14.0 815 818 821 824 830 832** 842 842 852 852 880 8100 8100 150 11.7 815 821 824 824 830 832** 842 842 852 860 880 8100 200 8.8 815 821 824 826 830* 842 842 852 852 880 8100 250 7.0 821 821 824 830 832** 842 842 852 860 880 8100 300 5.8 821 824 826 830* 832** 842 852 852 880 8100 400 4.4 826 830 832 842 852 852 860 500 3.5 830 842 842 852 852 860 600 2.9 830 832 842 842 852 852 860 2.00 Service Factor Nominal Output Input Horsepower @ 1750 RPM Ratio ♠ RPM 1/8 1/6 1/4 1/3 1/2 3/4 1 1-1/2 2 3 5 7-1/2 10 15 20 10 175.0 813 813 813 813 815 818 821 824 826 830* 842 852 852 N/A N/A 15 116.7 813 813 813 815 815 821 824 826 830 832 842 852 852 N/A N/A 20 87.5 813 813 813 815 818 821 824 826 830* 842 842 852 N/A N/A N/A 25 70.0 813 813 815 818 821 824 826 830* 842 842 852 870 870 880 8100 30 58.3 813 813 815 815 821 824 826 830* 832** 842 852 N/A N/A N/A 40 43.8 813 815 815 821 824 826 830 832 842 842 852 N/A N/A N/A 45 38.9 813 815 815 821 824 826 830 832** 842 842 852 N/A N/A N/A 50 35.0 813 815 821 821 824 826 830 842 842 852 860 870 880 8100 60 29.2 815 815 821 821 824 826 830* 842 842 852 860 N/A N/A 75 23.3 815 815 821 824 826 830 832 842 842 852 870 880 8100 80 21.9 815 815 821 824 826 830* 832** 842 842 852 N/A N/A N/A 100 17.5 815 815 821 824 826 832 842 842 852 852 880 8100 8100 125 14.0 815 821 824 824 830 832** 842 842 852 870 880 8100 150 11.7 815 821 824 826 830* 842 842 852 852 870 8100 8100 200 8.8 821 821 824 830 832** 842 842 852 860 880 8100 250 7.0 821 824 826 830* 842 842 852 852 880 8100 8100 300 5.8 821 824 830 832** 842 842 852 860 880 8100 400 4.4 830 830 842 842 852 852 860 500 3.5 832 842 842 852 852 860 600 2.9 830 842 842 852 852 860 175.0 813 813 813 813 813 815 818 824 824 830 842 842 852 N/A N/A N/A 15 116.7 813 813 813 813 815 818 821 824 826 830 842 842 852 N/A N/A N/A 20 87.5 813 813 813 813 815 821 821 824 826 832 842 852 852 N/A N/A N/A 25 70.0 813 813 813 815 818 824 824 826 830* 842 852 870 870 880 880 8100 30 58.3 813 813 813 815 818 821 824 826 830* 842 842 852 N/A N/A N/A N/A 40 43.8 813 813 815 815 821 824 826 830 832 842 852 852 N/A N/A N/A N/A 45 38.9 813 813 815 815 821 824 826 830* 832** 842 852 N/A N/A N/A N/A N/A 50 35.0 813 813 815 818 821 824 826 832 842 842 852 870 870 8100 8100 8100 60 29.2 813 815 815 821 824 826 826 832 842 842 852 N/A N/A N/A 75 23.3 813 815 818 821 824 826 830 832** 842 852 852 870 880 8100 80 21.9 813 815 815 821 824 826 830* 842 842 852 860 N/A N/A N/A 100 17.5 815 815 821 821 824 830 832 842 842 852 870 880 8100 8100 125 14.0 815 815 821 824 826 830* 832** 842 842 852 870 8100 8100 150 11.7 815 815 821 824 826 832 842 842 852 852 880 8100 8100 200 8.8 815 821 824 824 830* 832** 842 852 852 870 8100 8100 250 7.0 815 821 824 826 830* 842 842 852 852 880 8100 300 5.8 815 821 824 830 832** 842 842 852 860 880 400 4.4 826 830 830 842 842 852 852 500 3.5 830 832 842 842 852 852 860 600 2.9 830 830 842 842 852 852 860 1.75 Service Factor Nominal Output Input Horsepower @ 1750 RPM Ratio ♠ RPM 1/8 1/6 1/4 1/3 1/2 3/4 1 1-1/2 2 3 5 7-1/2 10 15 20 10 15 20 175.0 116.7 813 813 813 813 815 818 821 824 824 830* 842 842 852 N/A N/A 813 813 813 813 815 821 821 824 830 832 842 852 852 N/A N/A 10 Worm - Worm Gear Reducers Helical - Worm Gear Reducers

Single Reduction

Double Reduction

Double Reduction

WASHGUARD ® Reducers

Note: This chart is meant as a guide for reducer selections at specific motor horsepowers. Actual service factor may be greater than indicated. For actual service factors and maximum worm reducer ratings, refer to pages 194-197. ♠ 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.

indicates a selection where a smaller reducer (1 case size) can be used with redesigned product due to rating increase. indicates a selection where a smaller reducer (2 case sizes) can be used with redesigned product due to rating increase.

Accessories and

Additional Capabilities

* Size 832 must be used for NH Series for this selection. ** Size 842 must be used for NH Series for this selection.

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