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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.com192
Quick Selections
GR • NH • EL Series
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.
* Size 832 must be used for NH Series for this selection.
** Size 842 must be used for NH Series for this selection.
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.
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
175.0
813 813 813 813 815 818 821 824 824 830*
842 842 852 N/A N/A
15
116.7
813 813 813 813 815 821 821 824 830 832 842 852 852 N/A N/A
20
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
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
10
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