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Grey cast-iron speed reducer with C-face 56C flange and single output shaft

Dayton

Dayton 4RP19 Speed Reducer C-Face 56C 10:1 Ratio

SKU CH-NPF0-HM8A6

C-face worm gear reducer with 56C frame and 10:1 ratio delivering 554 in-lb output torque at 175 RPM

  • 10:1 ratio cuts input speed to 175 RPM for controlled output
  • 554 in-lb maximum torque handles heavy-duty loads
  • 56C C-face mounting fits standard NEMA motors directly
  • 06 inch worm center distance with cast iron housing ensures rigidity
  • 875 lb overhung load rating supports radial shaft forces

Dayton 4RP19 Speed Reducer Overview

The Dayton 4RP19 is a worm gear speed reducer designed for standard-duty power transmission applications. It features a C-face 56C frame for direct motor mounting and a right-angle shaft orientation. The unit provides a 10:1 nominal ratio with a hardened steel pinion and cast iron housing for durability.

Suited Applications and Limitations

This reducer suits machinery requiring a fixed 10:1 speed reduction at up to 1,750 input RPM with a maximum output torque of 554 in-lb. It is not for buyers who need a different gear ratio or higher input speed capability. It is also not for installations where the input motor shaft must point upward, as this mounting position is excluded.

Pre-Installation Checks

Verify that your motor matches the 56C frame and 5/8 inch bore diameter for proper coupling. Confirm the application does not exceed the 2 hp maximum input power rating or the 875 lb overhung load limit. Ensure the 1 inch output shaft diameter fits your driven equipment and that the 2.06 inch worm center distance aligns with your mounting layout.

Highlights

  • 10:1 ratio cuts input speed to 175 RPM for controlled output
  • 554 in-lb maximum torque handles heavy-duty loads
  • 56C C-face mounting fits standard NEMA motors directly
  • 06 inch worm center distance with cast iron housing ensures rigidity
  • 875 lb overhung load rating supports radial shaft forces

Specifications

No published specifications for this item yet.

Questions about this item

What motor frame must I already have to bolt this speed reducer directly?

The unit is built for a 56C frame motor with a 5/8-inch bore, so the motor must match that frame and shaft size for a direct C-face mount.

Will my existing 1750 RPM motor work with this 10:1 ratio reducer?

The reducer is rated for 1750 input RPM and delivers a nominal 175 output RPM at that speed, so a standard 1750 RPM motor matches the design point.

How can I confirm the reducer is producing the rated output after installation?

Measure the output shaft speed under load; it should run near 175 RPM when the input is 1750 RPM, and the output torque should not exceed 554 in-lb.

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