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Compact silver speed reducer with C-face input and 56C motor frame

Boston Gear

Boston Gear F842B-28K-B5-M1 Speed Reducer 28:1 56C

SKU CH-0AA1-9G26K

A helical speed reducer with a 28:1 ratio, 56C C-face input and up to 994 in-lb output torque

  • Helical gears deliver smooth power transmission
  • 28:1 ratio reduces speed to 62 RPM output
  • 994 in-lb torque handles demanding loads
  • 56C C-face mounts directly to standard motors
  • Any-angle mounting suits flexible installations

Boston Gear F842B Speed Reducer 28:1

The Boston Gear F842B-28K-B5-M1 is a helical speed reducer with a 28:1 gear ratio and a 56C C-face motor frame. It accepts a maximum input speed of 1,750 RPM and delivers up to 62 RPM output. The unit handles a maximum input horsepower of 1 hp and provides a maximum output torque of 994 in-lb. It mounts at any angle with a base-to-center height of 1.97 in.

Upgrade from lower-ratio or smaller-frame units

This reducer replaces units with a lower gear ratio when output speeds near 62 RPM are required. The jump is worth it when the application needs 994 in-lb of torque and a 56C frame interface. It also suits builds where a 620 lb overhung load capacity is necessary. Buyers who need a different ratio or a larger motor frame cannot use this model.

Sustained load behaviour

Roller bearings and hardened, ground steel gears support continuous operation at rated load. The reducer rotates in both clockwise and counter-clockwise directions. It maintains the 28:1 reduction under sustained input speeds up to 1,750 RPM. The 1 hp input limit and 994 in-lb output torque define the continuous duty envelope.

Highlights

  • Helical gears deliver smooth power transmission
  • 28:1 ratio reduces speed to 62 RPM output
  • 994 in-lb torque handles demanding loads
  • 56C C-face mounts directly to standard motors
  • Any-angle mounting suits flexible installations

Specifications

BrandBOSTON GEAR

Questions about this item

What mounting orientation does the F842B-28K-B5-M1 speed reducer support?

The unit can be mounted at any angle, providing flexibility for horizontal, vertical or angled installations.

How do you correctly install the C-Face input on a 56C motor frame?

Align the reducer's C-Face input with the 56C motor shaft, secure the mounting bolts evenly, and ensure the base-to-center distance of 1.97 in is maintained to avoid misalignment.

What ongoing maintenance does the helical gear reducer require?

Periodically check the transmission fluid level and condition, inspect the roller bearings for wear, and verify the overhung load does not exceed 620 lb to maintain the 994 in-lb torque rating.

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