Adjustable Motor-Mounting Bases
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Increase energy efficiency in belt-driven systems while reducing wear on components—use one of these bases to adjust your motor position to get the proper belt tension.
Bases for constant-speed applications keep your motor in a fixed position while operating.
Bases for variable-speed applications allow movement while operating to compensate for vibration and varying loads. They’re often used for automatic belt tensioning with spring-loaded pulleys in variable-speed drive applications.
For technical drawings and 3-D models, click on a part number.
For Motor NEMA Frame Size | For Max. Motor hp | Mounting Orientation | Max. Adjustment | Adjustment Style | Lg. | Wd. | Ht. | Each | ||
For Linear Adjustment in Constant-Speed Applications | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
A | 143, 143T | 1 1/2 | Horizontal | 3" | Cap Screw | 10 1/2" | 7 1/2" | 1 1/8" | 00000000 | 000000 |
A | 145, 145T | 3 | Horizontal | 3" | Cap Screw | 10 1/2" | 8 1/2" | 1 1/8" | 00000000 | 00000 |
A | 182, 182T | 5 | Horizontal | 3" | Cap Screw | 12 3/4" | 9 1/2" | 1 1/2" | 00000000 | 00000 |
A | 184, 184T | 7 1/2 | Horizontal | 3" | Cap Screw | 12 3/4" | 10 1/2" | 1 1/2" | 00000000 | 00000 |
A | 213T, 213 | 10 | Horizontal | 3 1/2" | Cap Screw | 15" | 11" | 1 3/4" | 00000000 | 00000 |
A | 215, 215T | 15 | Horizontal | 3 1/2" | Cap Screw | 15" | 12 1/2" | 1 3/4" | 00000000 | 00000 |
A | 56 | 3 | Horizontal | 3" | Cap Screw | 10 5/8" | 6 1/2" | 1 1/8" | 00000000 | 00000 |
B | 254, 254T | 20 | Horizontal | 4" | Cap Screw | 17 3/4" | 15 1/8" | 2" | 00000000 | 000000 |
B | 256, 256T | 25 | Horizontal | 4" | Cap Screw | 17 3/4" | 16 7/8" | 2" | 00000000 | 000000 |
B | 284, 284T | 30 | Horizontal | 4 1/2" | Cap Screw | 19 3/4" | 16 7/8" | 2" | 00000000 | 000000 |
B | 286T, 286 | 40 | Horizontal | 4 1/2" | Cap Screw | 19 3/4" | 18 3/8" | 2" | 00000000 | 000000 |
For Linear Adjustment in Variable-Speed Applications | ||||||||||
C | 48, 56 | 3 | Any Angle | 2 1/8" | Hex Nuts | 9 1/2" | 5 7/8" | 1 3/8" | 00000000 | 000000 |
D | 48, 56 | 3 | Any Angle | 5 7/8" | Hand Crank | 13 1/8" | 6 1/4" | 3" | 0000000 | 000000 |
E | 48, 56, 66, 143T, 145T, 182, 184, 56H, 203 | 2 | Horizontal, Vertical | 8" | Hand Crank | 18 1/8" | 8" | 3 1/4" | 0000000 | 000000 |