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Dayton 3GD43 worm gear speed reducer, cast iron housing, C-face 56C mounting, 20:1 ratio

Dayton

Dayton 3GD43 Speed Reducer 56C 20:1

SKU CH-QY61-3FCF4

A 20:1 worm gear speed reducer with a 56C C-face input, delivering up to 88 RPM output speed and 436 in-lb torque from a 0.75 hp motor

  • TypeBearings
  • Delivers 20:1 gear reduction for precise speed control
  • Handles up to 436 in-lb output torque for demanding loads
  • Supports 0.75 hp maximum input power for reliable operation
  • 56C C-face mounting fits standard motor frames directly
  • Cast iron housing with ball and tapered roller bearings ensures durability

Product Identity

The Dayton 3GD43 is a worm gear speed reducer built for 56C frame motors with a C-face input connection. It delivers a fixed 20:1 reduction ratio and a maximum output speed of 88 RPM. The cast iron housing supports any mounting orientation and contains ball and tapered roller bearings with hardened steel and manganese bronze gears. Maximum input horsepower is rated at .75 hp with an output torque capacity of 436 in-lb.

Application Fit

This unit suits machine builders and maintenance teams needing a compact right-angle drive for conveyors, mixers or packaging equipment where a 56C motor is already specified. The 150 lb overhung load capacity handles moderate side forces from pulleys or sprockets. Buyers who need a different gear ratio, higher input power capability, or an output shaft style other than keyed should look at alternative reducer models.

Deciding Specification

The 20:1 gear ratio is the single parameter that determines whether this reducer matches the required output speed and torque for the driven load. With a 1.75 inch worm center distance and a 56C frame interface, the ratio fixes the speed reduction and torque multiplication for a given motor RPM. Verify the target output speed against the 88 RPM maximum before selecting this part.

Highlights

  • Delivers 20:1 gear reduction for precise speed control
  • Handles up to 436 in-lb output torque for demanding loads
  • Supports 0.75 hp maximum input power for reliable operation
  • 56C C-face mounting fits standard motor frames directly
  • Cast iron housing with ball and tapered roller bearings ensures durability

Specifications

TypeBearings

Questions about this item

Will the 56C face mount directly to the NEMA 56C motor I already have?

Yes, the reducer uses a 56C C-face input that matches the standard NEMA 56C motor bolt pattern and shaft dimensions.

How can I verify the 20:1 ratio is delivering the rated 88 RPM output after installation?

Run the motor at its nameplate speed and measure the output shaft; it should turn at approximately 88 RPM under load.

Does the unit ship with mounting bolts, a key for the output shaft, and lubricant, or must I source them separately?

The reducer is factory-filled with lubricant and includes the output shaft key; mounting bolts for the motor and base are not supplied.

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