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Black oxide steel sprocket with 12 teeth and 1 1/4 inch bore keyway

Tritan

Tritan 80BS12H 12T 1 1/4in Bore Keyway SS Sprocket Collectible

SKU CH-FMNS-3AB12

Steel 80-chain sprocket with 12 teeth, 1 1/4 in finished bore, keyway and two set screws

  • TypeBearings, V-belts & Power Transmission Equipment
  • ColorTransparent
  • Designed for 80 chain size with 12 teeth for precise power transmission
  • 1 1/4 inch bore with keyway ensures secure shaft mounting
  • Black oxide finish protects steel from corrosion and wear
  • Includes two set screws for reliable locking during operation
  • 33 inch outside diameter fits standard drive configurations

Sports Memorabilia Sprocket

This Tritan collectible is a finished-bore sprocket presented as sports memorabilia. It carries a transparent appearance with a black-oxide finish on steel construction. The piece is supplied new and serves as a display item for enthusiasts of power-transmission hardware.

Verify Chain And Shaft Dimensions

Confirm that your existing drive uses 80 chain pitch with a single strand. The sprocket has a fixed 1 1/4 in bore with a 1/4 in wide by 1/8 in deep keyway and two set screws. Ensure the shaft diameter and key match these exact specifications before ordering.

Display Or Light-Duty Drive Component

The 12-tooth sprocket measures 4.33 in outside diameter and 3.864 in pitch diameter with a 3 1/8 in hub and 1.05 in projection. It fits onto a keyed shaft and is secured by the included set screws. The steel body and black-oxide finish suit static display or low-speed demonstration of chain engagement.

Highlights

  • Designed for 80 chain size with 12 teeth for precise power transmission
  • 1 1/4 inch bore with keyway ensures secure shaft mounting
  • Black oxide finish protects steel from corrosion and wear
  • Includes two set screws for reliable locking during operation
  • 33 inch outside diameter fits standard drive configurations

Specifications

BrandTRITAN
TypeBearings, V-belts & Power Transmission Equipment
ColorTransparent

Questions about this item

Does the sprocket arrive with the set screws already included, or do I need to order them separately?

Two set screws are included with the sprocket, so no separate purchase is required for them.

The listing shows a single 12‑tooth version — are other tooth counts or bore sizes available under this same model?

Only the 12‑tooth, 1 1/4 in bore configuration is offered for this model; other sizes would be different part numbers.

With a 4.33 in outside diameter and 12 teeth on 80 chain, how much chain wrap can I expect on a typical drive?

The 12‑tooth sprocket engages roughly one third of the chain at any moment, giving a standard wrap angle for single‑strand 80‑pitch drives.

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