Motors, Gears & Couplings

20+ products

Expected delivery: Tue, Nov 17

Motors, gears and couplings for conveyors, pumps, fans, mixers and machine drives. This subcategory covers general purpose AC motors, gear reducers, spur gears and gear racks, jaw couplings with elastomer spiders, sleeve couplings, rigid and flexible couplings, shaft collars in set screw and clamp styles, and square key stock. These parts connect a motor to the equipment it drives and carry torque from one shaft to the next.

What to check before you order

  • Motor nameplate data. Match horsepower, voltage, phase, RPM, NEMA frame size, enclosure type such as ODP or TEFC, and shaft size. Frame size sets mounting and shaft height.
  • Coupling bores and keyways. Each coupling half is sized to its shaft. The two bores do not have to be the same, but each must match its shaft and key.
  • Spider insert material. Jaw coupling spiders come in materials with different stiffness and heat limits. Match the material and size to the existing coupling.
  • Gear specifications. Gears are matched by pitch (or module for metric gears), pressure angle, tooth count, bore and face width.

Motor wiring and electrical connections should be done by a qualified person to code, and drives should be locked out before service under your site's lockout program. Bearings are in bearings and bushings, chain drives are in roller chain and sprockets, and more parts are in power transmission.

Common questions

What does TEFC mean on a motor?

Totally enclosed fan cooled: the motor is sealed from outside air and cooled by an external fan, suiting dusty or damp areas. Open drip proof (ODP) motors are for clean, dry locations.

What does the C in a 56C motor frame mean?

The motor has a C-face, a machined shaft-end face with threaded holes for bolting on a pump or gear reducer. Match the frame and face of the motor you replace.

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