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Black oxide steel sprocket, 18 teeth, 6.27 in outside diameter, 1 7/8 in bore

Tritan

Tritan 80BS18H 18-Tooth Roller Chain Sprocket 1 7/8 in Bore

SKU CH-XW8N-JM99D

Finished-bore steel sprocket with 18 teeth, 1 7/8 in bore, keyway and set screws for #80 chain

  • TypeBearings, V-belts & Power Transmission Equipment
  • ColorTransparent
  • Hard-wearing steel construction resists wear
  • 18 teeth match ANSI 80 chain pitch
  • 1 7/8 in finished bore with 1/2 in keyway
  • Black oxide finish protects against corrosion
  • Two set screws lock sprocket securely

Precision Power Transmission Sprocket

The Tritan 80BS18H is a finished-bore roller chain sprocket engineered for single-strand 80-series chain drives. Its 1 7/8 inch bore with a 1/2 inch keyway and two set screws provides a secure, positive lock onto driven shafts in industrial machinery.

Upgrade from Worn or Plain-Bore Sprockets

Replacing a worn sprocket restores correct pitch engagement and reduces chain wear, while the factory-finished bore eliminates the time and cost of custom machining a plain bore. The jump is worth it when existing hubs show elongation or when keyway alignment has become unreliable.

Limits of 80-Series Single-Strand Chain

The 1-inch pitch and 18-tooth geometry fix the pitch diameter at 5.759 inches and the outside diameter at 6.27 inches, defining the speed ratio and envelope. The hub projection of .925 inches and 4 1/4 inch hub diameter constrain available shaft length and adjacent component clearance.

Highlights

  • Hard-wearing steel construction resists wear
  • 18 teeth match ANSI 80 chain pitch
  • 1 7/8 in finished bore with 1/2 in keyway
  • Black oxide finish protects against corrosion
  • Two set screws lock sprocket securely

Specifications

BrandTRITAN
TypeBearings, V-belts & Power Transmission Equipment
ColorTransparent

Questions about this item

What shaft diameter does the 1 7/8 in bore of the 80BS18H sprocket fit?

The fixed bore is machined to 1 7/8 in with a 1/2 in keyway, so it mounts directly on a shaft of that exact diameter.

How do the two set screws secure the 80BS18H sprocket during installation?

Tighten both set screws onto the key and shaft flats after aligning the keyway; skipping the second screw is the common error that lets the hub rotate.

When should the black-oxide finish on the 80BS18H sprocket be inspected or replaced?

Check the 18 teeth and 6.27 in outside diameter for wear whenever the chain is serviced; replace the sprocket once tooth profiles show hooking or the finish has worn through.

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