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Cast iron worm speed reducer with 56C C-face input, round output shaft, 30:1 ratio

Boston Gear

Boston Gear F718-30-B5-G Speed Reducer 56C 30:1

SKU CH-CD4V-3EFB7

A worm-gear speed reducer with a 30:1 ratio, 56C C-face input and 58 RPM maximum output speed

  • 30:1 ratio reduces speed to 58 RPM output
  • 5 hp input handles light industrial loads
  • 416 in-lb torque drives demanding applications
  • Cast iron housing resists wear in harsh environments
  • 56C C-face mount fits standard motor frames

Speed Reducer for 56C Motors

The Boston Gear F718-30-B5-G is a worm-gear speed reducer built for 56C frame motors with a C-Face input. It provides a fixed 30:1 reduction ratio in a cast-iron housing with hardened and ground steel gearing. The unit suits applications requiring right-angle power transmission and a compact footprint.

Sustained Load Behaviour

Rated for a maximum input of .5 hp, the reducer delivers up to 416 in-lb of output torque at 58 RPM. Tapered roller bearings support an overhung load capacity of 150 lb during continuous operation. The design allows mounting at any angle to maintain lubrication and thermal stability under steady demand.

Ratio and Interface Limits

The 30:1 gear ratio fixes the output speed relative to the motor, limiting flexibility for variable-speed needs. A worm center distance of 1.75 in and a base-to-center height of 2.06 in define the mounting envelope. Rotation is reversible CW or CCW, but the single ratio cannot be changed in the field.

Highlights

  • 30:1 ratio reduces speed to 58 RPM output
  • 5 hp input handles light industrial loads
  • 416 in-lb torque drives demanding applications
  • Cast iron housing resists wear in harsh environments
  • 56C C-face mount fits standard motor frames

Specifications

BrandBOSTON GEAR

Questions about this item

How much heat and noise does the F718-30-B5-G generate when running continuously at 0.5 hp?

The unit is rated for a maximum input of 0.5 hp and 30:1 ratio, delivering up to 416 in-lb output torque at 58 RPM; worm-gear designs typically run warm under continuous load, so allow adequate ventilation.

What motor frame and input connection must I already have to mount this reducer?

It requires a NEMA 56C frame motor with a C-Face input connection to match the 56C designation and C-Face input type.

Will the 1.75 in centre distance and 2.06 in base-to-centre height align with my existing 56C footprint?

The worm centre distance is 1.75 in and base-to-centre height is 2.06 in; verify these dimensions against your current mounting pattern before installation.

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