Grove Gear Products Catalog 8050

GR Series Dimensions Styles: FEMQ, FEM, FE

Single Reduction Worm Gear Reducers

STYLE FEMQ, FEM, FE DIMENSIONS (Inches)

Worm - Worm Gear Reducers

Series

A

AC

AD

AM B

D CD

F

FA 

FH H

I

J

L

M

GR830 11.00 0.375 .31-18 UNC X 1.00 DP 3.15 11.00 4.60 3.00 9.00 N/A 5.12 .56 4.84 9.00 6.57 2.38 GR832 12.50 0.375 .31-18 UNC X 1.00 DP 3.40 12.50 5.52 3.25 10.50 N/A 5.75 .56 5.02 10.50 6.76 2.38 GR842 14.00 0.500 .38-16 UNC X 1.00 DP 3.62 14.00 5.74 4.25 12.00 N/A 6.75 .69 6.10 12.00 9.57 3.47 GR852 16.00 0.750 .38-16 UNC X 1.00 DP 4.28 16.00 6.00 5.25 14.00 N/A 8.00 .81 7.50 14.00 10.88 3.38 GR860 19.50 0.750 .38-16 UNC X 1.00 DP 5.28 19.50 7.00 6.00 17.00 11.13 9.50 .88 N/A 17.00 11.78 3.41 GR870 22.00 1.000 .38-16 UNC X 1.00 DP 6.06 22.00 8.50 7.00 19.00 11.37 10.75 1.13 N/A 19.00 11.50 2.97 GR880 28.00 1.062 .62-11 UNC X 1.50 DP 6.22 28.00 10.00 8.00 24.00 12.52 13.75 1.31 N/A 24.00 12.50 2.84 GR8100 32.00 1.118 .62-11 UNC X 1.50 DP 7.94 32.00 12.50 10.00 28.00 14.69 17.00 1.31 N/A 28.00 15.50 3.76

Double Reduction

T

U

Helical - Worm Gear Reducers

Input Key 

Series

N

O*

V

P 

+0.000 -0.0015

+0.000 -0.0015

GR830 GR832 GR842 GR852 GR860 GR870 GR880

14.38 4.96 0.78 1.438 .875 3/16 x 1.63 3/8 x 3.88 15.00 4.63 0.88 1.625 .875 3/16 x 1.63 3/8 x 3.69 16.50 5.91 1.00 1.688 1.250 1/4 X 2.50 3/8 x 4.68 16.50 5.62 1.25 2.188 1.250 1/4 X 3.00 1/2 x 4.63 22.50 7.63 1.50 2.438 1.500 3/8 X 3.00 5/8 x 6.50

Double Reduction

24.00 7.63 1.75 2.937 1.625 3/8 x 2.87** 27.06 9.25 2.00 3.438 1.875 1/2 x 2.81** GR8100 29.50 9.43 2.25 3.938 2.250 1/2 x 3.69**

3/4 x 6.44 7/8 x 8.00

1 x 7.75

Motor Mounting Dimensions

WASHGUARD ® Reducers and GEAR+MOTOR™ Ratio Multipliers

NEMA DIMENSIONS (Inches) LM L1 LQ

NEMA DIMENSIONS (Inches)

LQ1

RQ

Frame AJ b

BF b

AK BD BE BE1 Bore Keyway 

Size

56C/

180TC/

250TC 56C/140TC 180TC 210TC 250TC 56C/140TC 180TC 210TC 250TC

Dia.

140TC 210TC

56C 5.88 4.50 6.50 0.38 N/A .625 3/16 X 3/32 0.41 140TC 5.88 4.50 6.50 0.38 N/A .875 3/16 X 3/32 0.41 180TC 7.25 8.50 9.00 N/A 0.50 1.125 1/4 X 1/8 0.53 210TC 7.25 8.50 9.00 N/A 0.50 1.375 5/16 X 5/32 0.53 250TC 7.25 8.50 9.00 N/A 0.50 1.625 3/8 X 3/16 0.53

GR830 GR832 GR842 GR852 GR860 GR870 GR880

8.82 9.01

9.82

N/A 5.95 6.15 6.56 N/A 5.32 N/A 6.14 6.34 6.75 N/A 5.51

5.63 6.06 N/A 5.81 6.25 N/A 6.68 6.68 7.24 7.98 7.98 8.54

10.01

11.81 12.90 13.46 13.21 14.30 14.86

6.45 7.21 7.21 7.77 6.04 7.85 8.61 8.61 9.17 7.35

N/A 15.88 16.50 10.45 9.33 9.33 9.94 10.01 8.69 8.69 8.69

N/A 15.50 15.50

N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A

N/A 16.58 

16.58

IEC B5 & B3/B5 METRIC DIMENSIONS (Inches)  RQ Size D71D D80D D90D D100LD/ D132D D71D D80D D90D D100LD/ LQ 4.78 5.41 5.41 5.88 N/A 4.59 5.22 5.22 5.57 4.97 5.59 5.59 6.07 N/A 4.78 5.41 5.41 5.76 N/A N/A 6.38 6.39 7.17 N/A N/A 6.16 6.14 N/A N/A 7.78 7.78 8.57 N/A N/A 7.46 7.45 D112MD D112MD GR830 GR832 GR842 GR852

IEC B5 & B3/B5 METRIC DIMENSIONS (MM)

Frame

AJ AK BD BE Bore Keyway 

BF TAP OD

Dia.

D132D

D71D D80D D90D

130 110 132 11 14 5 X 2.5 M8 X 1.25 146 165 130 165 15 19 6 X 3 M10 X 1.50 184 165 130 165 15 24 8 X 3.5 M10 X 1.50 184

N/A N/A 6.93 8.24

D100LD/ D112MD

215 180 216 18 28 8 X 3.5 M12 X 1.75 237

D132D

265 230 267 18 38 10 X 4 M12 X 1.75 290

** Key not provided with gear reducer. Keyway dimension shown.  Keyway width by depth  Mounting holes rotated 45 degrees from positions shown on Size GR860, Style FEM with frame sizes 180TC-250TC.  180TC not available  Metric IEC B5 input flange options are available only on quill input styles.

 Style FE and FEM only.  Sizes 860-8100 are supplied with a fan. Dimensions refer to fan guard location.

For safety, purchaser or user should provide protective guards over shaft extensions and any couplings, sheaves and belts, sprockets and chains, etc., mounted thereon.

WARNING

Additional Capabilities

Accessories and

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