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Tsubaki 80B15 steel sprocket black oxide finish 15 teeth 1 inch bore

Tsubaki

Tsubaki 80B15 Sprocket 80 Chain 1 Bore 15 Teeth

SKU CH-S3W4-59GS1

Steel sprocket for single-strand 80 chain with 15 teeth, 1-inch plain bore and 5.3-inch outside diameter

  • TypeSprockets
  • Designed for 80 chain pitch with 15 precision-machined teeth
  • 1 in plain bore includes 1/4 in keyway and set screws for secure mounting
  • 1045 steel construction with black oxide finish resists wear in power transmission
  • 3 in outside diameter and 4.81 in pitch diameter ensure accurate chain engagement
  • 1 5/8 in length through bore with 3 13/16 in hub provides rigid shaft support

Industrial Power Transmission Component

The Tsubaki 80B15 sprocket is a steel power-transmission part built for 80 chain pitch. It suits maintenance engineers and machine builders who need a durable, single-strand drive element in new condition. The 15-tooth profile mates with standard roller chain for reliable torque transfer.

Steel Construction With Plain Bore Mounting

Grade 1045 steel with a black-oxide finish resists wear in demanding environments. A 1-inch plain bore and one-sided hub allow direct shaft fitting, while the included set screws and 1/4-inch keyway secure the sprocket against rotation. Hub projection measures 0.925 inch for compact assemblies.

Ready-to-Install Hardware Included

The package supplies set screws that match the keyway depth of 1/8 inch, so no separate fastener sourcing is required. This reduces downtime during replacement or new-build installation. Buyers needing a different bore size, tooth count, or multi-strand configuration should select an alternative part number.

Highlights

  • Designed for 80 chain pitch with 15 precision-machined teeth
  • 1 in plain bore includes 1/4 in keyway and set screws for secure mounting
  • 1045 steel construction with black oxide finish resists wear in power transmission
  • 3 in outside diameter and 4.81 in pitch diameter ensure accurate chain engagement
  • 1 5/8 in length through bore with 3 13/16 in hub provides rigid shaft support

Specifications

TypeSprockets

Questions about this item

What chain pitch and size does the 80B15 sprocket engage, and what outside diameter does that produce?

The sprocket is cut for 1 in pitch chain, chain number 80, single strand, giving an outside diameter of 5.3 in.

What bore, keyway and hub dimensions must the shaft and mounting space accommodate?

Plain 1 in bore with a 1/4 in wide by 1/8 in deep keyway, hub diameter 3 13/16 in, hub projection 0.925 in, length through bore 1 5/8 in.

How is the sprocket secured to the shaft, and what step is often missed during installation?

Two set screws lock onto the keyway; the step often missed is tightening both screws evenly after the key is fully seated.

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