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Black oxide steel sprocket, 12 teeth, 4.33 in diameter, 1 3/4 in bore with keyway and set screws

Tritan

Tritan 80BS12H 1 3/4 in Bore Sprocket collectible

SKU CH-D77B-X5837

A finished-bore steel sprocket with 12 teeth for 80 chain, 1 3/4 in bore, keyway and two set screws included

  • TypeBearings, V-belts & Power Transmission Equipment
  • ColorTransparent
  • Precision power transfer with 12-tooth 80-chain sprocket
  • Durable black-oxide steel resists wear in tough conditions
  • Ready-to-mount 1 3/4 in finished bore with keyway
  • Secure dual set-screw locking prevents slippage
  • Compact 4.33 in outside diameter fits tight spaces

12-Tooth Steel Sprocket for 80 Chain

This new Tritan sprocket has 12 teeth and a 1 3/4 in finished bore with a 3/8 in wide by 3/16 in deep keyway. Two set screws secure the hub, which measures 3 1/8 in diameter with a 1.05 in projection. The steel body carries a black oxide finish and an outside diameter of 4.33 in.

Replaces worn 80-chain drive sprockets

Install this sprocket when an existing 80-chain unit shows tooth wear, hub damage or excessive run-out. The fixed-bore design matches the original bore diameter and keyway dimensions, so the jump is worth it when the shaft and key are still serviceable and the chain pitch remains 1 in.

Verify shaft diameter, keyway and hub clearance

Confirm the shaft measures exactly 1 3/4 in and that the existing key matches the 3/8 in width and 3/16 in depth. Check that 3 1/8 in hub diameter and 1.05 in projection clear adjacent components, and that the 1 5/8 in length through bore fits the available shaft length.

Highlights

  • Precision power transfer with 12-tooth 80-chain sprocket
  • Durable black-oxide steel resists wear in tough conditions
  • Ready-to-mount 1 3/4 in finished bore with keyway
  • Secure dual set-screw locking prevents slippage
  • Compact 4.33 in outside diameter fits tight spaces

Specifications

BrandTRITAN
TypeBearings, V-belts & Power Transmission Equipment
ColorTransparent

Questions about this item

What shaft diameter does the 1 3/4 in bore fit?

The fixed bore is machined to 1 3/4 in and includes a 3/8 in wide by 3/16 in deep keyway plus two set screws for positive location on a matching shaft.

How do I secure the sprocket on the shaft during installation?

Align the key in the 3/8 in keyway, slide the sprocket onto the shaft, then tighten both set screws against the key and shaft flat to prevent rotation.

Which components will need replacement as the chain wears?

The 12-tooth steel sprocket with 4.33 in outside diameter and 3.864 in pitch diameter mates with 80 chain; inspect tooth profiles regularly and replace the sprocket when hooking or uneven wear appears.

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