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Compact cast-iron worm speed reducer with C-face input and keyed output shaft

Dayton

Dayton 4RN80 Speed Reducer C-Face 56C 60:1 Ratio 0.25 hp 280 in-lb

SKU CH-5NNE-NDMY1

A C-face speed reducer with a 60:1 ratio delivering up to 280 in-lb torque at 29 RPM for 56C frame motors

  • Delivers 280 in-lb output torque for heavy-duty loads
  • 60:1 ratio reduces speed to 29 RPM for precise control
  • Accepts 0.25 hp input power matching 56C motor frames
  • Cast-iron housing with ball and tapered roller bearings ensures durability
  • Mounts at any angle for flexible installation options

Application Fit

The Dayton 4RN80 is a worm-gear speed reducer built for a C-face 56C motor frame. It delivers a fixed 60:1 reduction, turning motor input into a maximum output speed of 29 RPM. The unit suits light-duty machinery that needs high torque multiplication in a compact cast-iron housing.

Sustained Load Behaviour

Hardened-steel worm and manganese-bronze gearing run on ball and tapered-roller bearings rated for a 150 lb overhung load. The housing accepts any mounting angle, so lubrication stays consistent during continuous operation. Maximum output torque is rated at 280 in-lb when driven by a 0.25 hp motor.

Deciding Specification

The 60:1 ratio and 29 RPM top speed are the fixed parameters that determine whether this reducer matches the driven equipment. If the application requires a different output speed or a higher input horsepower than 0.25 hp, this unit will not fit the requirement.

Highlights

  • Delivers 280 in-lb output torque for heavy-duty loads
  • 60:1 ratio reduces speed to 29 RPM for precise control
  • Accepts 0.25 hp input power matching 56C motor frames
  • Cast-iron housing with ball and tapered roller bearings ensures durability
  • Mounts at any angle for flexible installation options

Specifications

No published specifications for this item yet.

Questions about this item

How hot does the cast-iron housing get when the 0.25 hp reducer runs continuously at 29 RPM output?

The cast-iron housing dissipates heat from the hardened-steel worm and manganese-bronze gear during continuous 0.25 hp operation at 29 RPM.

Which motor frame and shaft style must I already have to bolt this C-Face unit directly?

A NEMA 56C frame motor with a keyed output shaft matches the C-Face input and 60:1 ratio of this reducer.

Will the 280 in-lb output torque and 150 lb overhung load work with my existing 56C-frame conveyor drive?

Yes — the 280 in-lb maximum output torque and 150 lb overhung-load capacity are rated for the 56C frame and keyed output shaft.

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