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Steel sprocket with black oxide finish, 25 teeth, 7/8 inch bore with keyway

Tritan

Tritan 40BS25H 25-Tooth Sprocket 7/8 in Bore Keyway Collectible

SKU CH-XPF5-7AC4R

A 25-tooth steel sprocket for 40 chain with a 7/8-inch bore, keyway and set screws included

  • TypeBearings, V-belts & Power Transmission Equipment
  • ColorTransparent
  • 25-tooth design matches #40 chain pitch precisely
  • 7/8 in bore with 3/16 in keyway ensures secure shaft fit
  • Black oxide finish resists corrosion in demanding environments
  • Two set screws included for positive locking on the hub
  • 26 in outside diameter fits standard 40-series drive layouts

Finished-Bore Sprocket for 40 Chain

The Tritan 40BS25H is a 25-tooth steel sprocket with a fixed 7/8 in bore, keyway and two set screws included. It suits maintenance teams and machinery builders who need a ready-to-mount replacement for single-strand 40 chain drives. The black-oxide finish adds corrosion resistance for industrial environments.

Fits Single-Strand 40 Chain Drives

The sprocket matches 1/2 in pitch chain and uses a one-side hub with 3 3/4 in diameter and .716 in projection. The 3/16 in wide by 3/32 in deep keyway locks to a standard keyed shaft, while the two set screws provide secondary retention. No additional bushings or adapters are required for installation.

Consistent Engagement Under Continuous Operation

The 3.989 in pitch diameter and 4.26 in outside diameter maintain accurate tooth-to-roller contact during sustained running. Hardened steel teeth resist wear when the drive operates at constant load, and the black-oxide coating reduces surface fatigue over extended duty cycles.

Highlights

  • 25-tooth design matches #40 chain pitch precisely
  • 7/8 in bore with 3/16 in keyway ensures secure shaft fit
  • Black oxide finish resists corrosion in demanding environments
  • Two set screws included for positive locking on the hub
  • 26 in outside diameter fits standard 40-series drive layouts

Specifications

BrandTRITAN
TypeBearings, V-belts & Power Transmission Equipment
ColorTransparent

Questions about this item

What is the maximum bore diameter for the 25-tooth sprocket?

The maximum bore diameter is 7/8 in, matching the finished bore size on this model.

How much heat or noise does the steel sprocket generate during continuous operation?

As a passive steel component, it produces no measurable heat or noise beyond normal chain engagement.

Which chain pitch and size are required to mesh with the 40BS25H sprocket?

It is designed for 1/2 in pitch chain, single strand, chain number 40.

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