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Steel sprocket, 21 teeth, black oxide finish, 5/8 inch plain bore

Tritan

Tritan 40B21H 5/8 MPB Sprocket collectible

SKU CH-Y81W-QPEHP

A steel sprocket with 21 teeth for 40 chain, plain 5/8-inch bore and black oxide finish

  • TypeBearings, V-belts & Power Transmission Equipment
  • ColorTransparent
  • 21-tooth steel sprocket drives 40 chain smoothly
  • 5/8 in plain bore fits shafts without keyway
  • 62 in outside diameter matches standard 40 pitch
  • Black oxide finish resists corrosion on new steel
  • Hub projects .716 in for compact mounting

Steel sprocket for 40 chain

This steel sprocket carries 21 teeth and fits 40 chain with a 1/2 in pitch. The plain bore measures 5/8 in and the hub projects 0.716 in. A black-oxide finish protects the surface.

Builders using 40 chain

It suits anyone assembling or repairing drives that run on 40 chain and need a 5/8 in plain bore. Buyers who require a keyway, a different bore size or a larger tooth count must choose another part.

21 teeth on 40 chain

The 21-tooth count fixes the speed ratio and chain engagement for 40 chain. Pitch diameter is 3.355 in and outside diameter is 3.62 in, so the sprocket only matches drives designed for those dimensions.

Highlights

  • 21-tooth steel sprocket drives 40 chain smoothly
  • 5/8 in plain bore fits shafts without keyway
  • 62 in outside diameter matches standard 40 pitch
  • Black oxide finish resists corrosion on new steel
  • Hub projects .716 in for compact mounting

Specifications

BrandTRITAN
TypeBearings, V-belts & Power Transmission Equipment
ColorTransparent

Questions about this item

How can I confirm the sprocket is running true after installation?

Spin the sprocket by hand and watch the 3.62 in outside diameter for wobble; the chain should engage the 21 teeth smoothly with no tight spots or lateral jump.

What comes in the package and what must I supply separately?

The box contains the single steel sprocket with a 5/8 in plain bore and black-oxide finish; you must provide the 40 chain, a key or set screw if your shaft requires one, and any mounting hardware.

Which bore size matches a 5/8 inch shaft?

This model is machined with a 5/8 in plain bore and a 1 in length through bore, so it fits a 5/8 in shaft directly without additional bushings.

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