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Black oxide steel sprocket with plain bore and nine teeth

Tsubaki

Tsubaki 80B9 Sprocket collectible

SKU CH-2CW5-4VCHM

New steel sprocket for 80 chain size with nine teeth and plain 1-inch bore

  • TypeBearings, V-belts & Power Transmission Equipment
  • ColorTransparent
  • Precision-machined 1045 steel ensures long service life
  • 9-tooth design matches 80 chain pitch for smooth engagement
  • 35 in outside diameter fits standard drive layouts
  • Black oxide finish resists corrosion in harsh environments
  • Includes set screws and keyway for secure shaft mounting

Precision power-transmission component

This Tsubaki 80B9 sprocket is a plain-bore, single-strand chainwheel machined from 1045-grade steel with a black-oxide finish. It accepts a 1-inch bore and includes set screws plus a 1/4-inch keyway for positive drive engagement. Industrial maintenance teams and OEM builders use it to replace worn 80-chain sprockets on conveyors, drives and agricultural equipment.

Direct replacement for worn 80-chain wheels

Swapping to this 9-tooth sprocket restores correct pitch diameter when the original teeth have elongated the chain or deformed under load. The jump is worth it when vibration, noise or skipped teeth appear on single-pitch 80 chain running at standard speeds. Buyers who need a different tooth count, a taper-lock hub or a multi-strand configuration cannot use this part.

Limited by single-strand 80-chain geometry

The 2.924-inch pitch diameter and 3.35-inch outside diameter fix the speed ratio and chain wrap for a given shaft centre distance. Only single-pitch 80 roller chain fits the tooth profile; double-pitch or metric chain will not engage. The 1 5/16-inch maximum bore and 1.05-inch hub projection set the shaft-size and mounting-space boundaries for any design using this sprocket.

Highlights

  • Precision-machined 1045 steel ensures long service life
  • 9-tooth design matches 80 chain pitch for smooth engagement
  • 35 in outside diameter fits standard drive layouts
  • Black oxide finish resists corrosion in harsh environments
  • Includes set screws and keyway for secure shaft mounting

Specifications

BrandTSUBAKI
TypeBearings, V-belts & Power Transmission Equipment
ColorTransparent

Questions about this item

What shaft diameter and keyway dimensions does the 80B9 sprocket require?

The plain bore is 1 in with a maximum bore of 1 5/16 in, keyway width 1/4 in and keyway depth 1/8 in.

Which step is most often missed when mounting this sprocket on a 1 in shaft?

Align the key in the 1/4 in wide keyway, then tighten the included set screws against the shaft to prevent rotation.

When should the sprocket be replaced due to chain wear?

Replace when tooth profiles show visible hooking or when chain elongation exceeds the manufacturer’s wear limit for 80 chain.

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