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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.

How it compares

Measured against everything we stock in Bearings, Belts & Drive Components, at today’s prices. Recalculated every night.

Price $518.99
Pricier than about 93% of the 693 comparable items (median $35.99).

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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