Authorized Manufacturers' Representative
Bison Gear Ametek Gearmotors
Over 700 standard gearmotors in AC and DC — inline parallel shaft, offset parallel shaft, and right angle configurations. From 1/53 HP to 1.5 HP with torque output up to 1,090 in-lbs. Backed by 100+ years of power transmission expertise, now an AMETEK business.
Request a Quote Browse Gearmotors →Why OEMs Build with Bison
Bison Gear, now an AMETEK business, manufactures more than 700 standard gearmotors across 23 configurations. Their 200 Series inline parallel shaft gearmotor has powered hundreds of different applications for over four decades. For applications requiring custom solutions, Bison engineers work as an extension of your design team — delivering customizable, integrated solutions from fractional HP motors to complete gearmotor assemblies.
700+ Standard Configurations
Inline parallel shaft, offset parallel shaft, and right angle gearmotors in both AC and DC. Over 300 inline and 300 right angle models available off the shelf.
Hypoid Right Angle Gearmotors
Bison's PowerSTAR hypoid gearing delivers higher efficiency, more power density, quieter operation, and lower backlash than conventional worm gear designs — with exclusive PowerSTAR EP lubricant for extended life.
IP69K Washdown (Sanimotor)
The 261 Series Sanimotor features a 3-phase AC motor and gear train in a single IP69K-rated stainless steel shell — purpose-built for food processing, pharmaceutical, and high-pressure washdown environments.
Custom Engineering Partner
Bison engineers solve technical challenges beyond off-the-shelf solutions. Customizable motors, gearmotors, and integration support for OEMs who need a true technology partner.
Product Lines
| Configuration | HP Range | Torque | Power |
|---|---|---|---|
| Inline Parallel Shaft (200 Series) | 1/20–1/2 HP | Up to 600 in-lbs | AC & DC |
| Right Angle Worm Gear | 1/20–1/2 HP | 34–1,090 in-lbs | AC & DC |
| Right Angle Hypoid (PowerSTAR) | 1/4–1/2 HP | 79–1,730 in-lbs | AC & DC |
| Offset Parallel Shaft | 1/6–1/2 HP | High torque | AC & DC |
| 261 Sanimotor (IP69K Washdown) | Various | Various | 3-Phase AC |
| Fractional HP Motors (PMDC/PMAC) | 1/53–1.5 HP | — | AC & DC |
| Gear Reducers (standalone) | Up to 5 HP input | Various | — |
Get a Bison Gearmotor Quote
Tell us your speed (RPM), torque, voltage, and mounting configuration — or send an existing part number. We'll respond with pricing and lead time within one business day.
Request a Quote →Frequently Asked Questions
What's the advantage of hypoid gearing over worm gearing?
Hypoid gears have larger-diameter pinions with more surface contact area, resulting in higher efficiency, greater torque capacity, quieter operation, and lower backlash. Bison's PowerSTAR hypoid gearmotors deliver best-in-class performance for right-angle applications.
Are washdown-rated gearmotors available?
Yes. Bison offers a full line of IP69K-rated stainless steel washdown products including inline parallel shaft gearmotors, right angle gear reducers, and standalone motors from 1/3 to 2 HP. The 261 Series Sanimotor is the flagship washdown product.
Can Bison custom-engineer a gearmotor for my application?
Absolutely. Bison's engineering team works directly with OEM customers to design custom motor, gearmotor, and gear reducer solutions. They become an extension of your design team — providing customizable and optimized solutions for even the most challenging applications.
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