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Cast iron worm speed reducer, C-face 56C, 40:1 ratio

Boston Gear

Boston Gear F7718-40-B5-G Speed Reducer 56C 40:1

SKU CH-K74T-NCEBP

Worm speed reducer with a 40:1 ratio, 56C C-face input, and 355 in-lb output torque

  • Worm gearing delivers 355 in-lb output torque
  • 40:1 ratio reduces speed to 44 RPM maximum
  • 3 hp input rating suits fractional-horsepower motors
  • 56C C-face mounting aligns with standard NEMA frames
  • Cast-iron housing with tapered roller bearings handles 150 lb overhung load

Speed Reducer for 56C Motor Frame

The Boston Gear F7718-40-B5-G is a worm-gear speed reducer built for a 56C motor frame. It provides a 40:1 reduction ratio with a maximum output speed of 44 RPM. The unit accepts C-face input and delivers a round output shaft. It suits applications requiring right-angle power transmission in a compact cast-iron housing.

Mounting Flexibility and Load Capacity

The reducer mounts at any angle thanks to its 1.75 inch worm center distance and 2.06 inch base-to-center dimension. A maximum input horsepower of .3 hp drives up to 355 in-lb of output torque. Tapered roller bearings support an overhung load capacity of 150 lb. Hardened and ground steel gearing meshes within the cast-iron housing for durable operation.

Sustained Operation Characteristics

Under continuous load the hardened steel worm gear resists wear while the tapered roller bearings maintain alignment. The cast-iron housing dissipates heat generated during extended duty cycles. Rotation is reversible CW or CCW without internal changes. California Proposition 65 warnings apply for chemicals known to cause cancer and reproductive harm.

Highlights

  • Worm gearing delivers 355 in-lb output torque
  • 40:1 ratio reduces speed to 44 RPM maximum
  • 3 hp input rating suits fractional-horsepower motors
  • 56C C-face mounting aligns with standard NEMA frames
  • Cast-iron housing with tapered roller bearings handles 150 lb overhung load

Specifications

BrandBOSTON GEAR

Questions about this item

What is the maximum output torque the 40:1 gear reducer can sustain?

The unit is rated for 355 in-lb of output torque at its 40:1 ratio.

How much heat and noise should I expect when the reducer runs continuously at 0.3 hp input?

At the rated 0.3 hp input the cast-iron housing and tapered-roller bearings dissipate heat without forced cooling, and the hardened worm gear runs quietly in normal industrial ambient conditions.

Which motor frame must I already have to bolt to the 56C input flange?

A NEMA 56C-frame motor with a C-face mounting registers directly to the reducer's input flange.

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