Helical Shaft-Mounted Speed Reducer (HSM) features patented keyless, steel Taper-Grip® bushing for easy mounting and as well as traditional keyed hub option
Helical Shaft Mount (HSM)
Helical Shaft-Mounted Speed Reducer (HSM) is one of the most popular products in our portfolio.
Sumitomo Helical Shaft Mount (HSM)
- Keyless Taper-Grip® Bushing
- 25-Degrees Pressure-Angled Gears
- Integrated BackStop Option
- Heavy Duty Roller Bearings for Maximum Strength and Extended Life
- Available with CEMA Screw-Conveyor Drive Option
Output | Taper-Grip® Bushing and Parallel Bore |
Mounting | Hollow Shaft |
Sizes | 13 frame sizes |
Ratio | 5:1 to 25:1 |
Power Range | 1/4 to 300HP (0.20kW to 220kW ) |
Torque Capacity | Up to 389,432 lb-in (44,051 N.m) |
Motor Standard | CE, JIS, NEMA, IEC, UL, CSA |
Helical Shaft-Mounted Speed Reducer (HSM)

IT'S ALL IN THE GEARS!
0.01%
Warranty Claims
1 Million +
Units Sold
80Years
of Experience
LESS WEIGHT, MORE TORQUE
Intergral Pinion
Robust, integrated input shafts and pinions providing reliability and durability
Taper Grip Bush
Simple keyless mounting and easy removal
Case Design
Gear case is manufactured from grey cast iron, and is precision bored and doweled to ensure accurate assembly.

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