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Black oxide steel sprocket with 13 teeth and 3/4 inch bore keyway

Tritan

Tritan 40BS13H 40 Chain 13T 3/4in Bore Keyway collectible

SKU CH-5WZS-EA7BD

A 13-tooth steel sprocket for 40 chain with a 3/4-inch bore, keyway, and two set screws

  • TypeBearings, V-belts & Power Transmission Equipment
  • ColorTransparent
  • 13-tooth design matches #40 chain pitch precisely
  • 3/4 in bore with 3/16 in keyway ensures positive torque transfer
  • Black-oxide steel finish resists corrosion in harsh environments
  • Two set screws lock sprocket securely to the shaft
  • Compact 2.33 in outside diameter fits tight machine spaces

Precision power-transmission sprocket

The TRITAN 40BS13H is a finished-bore sprocket built for single-strand 40 chain with a 1/2 in pitch. It suits maintenance engineers and machinery builders who need a direct-fit component with a fixed 3/4 in bore and integral keyway for positive torque transfer.

Steel construction with black oxide finish

The carbon-steel body carries a black oxide coating that resists corrosion in normal industrial environments. With a pitch diameter of 2.089 in and outside diameter of 2.33 in, the 13-tooth profile runs smoothly at typical drive speeds while the 0.591 in hub projection keeps the assembly compact.

Ready-to-mount hub with dual set screws

A 1 9/16 in hub diameter provides solid shaft engagement, and the 3/16 in wide by 3/32 in deep keyway locks rotation without additional machining. Two included set screws secure axial position, while the 7/8 in length through bore ensures full key contact for reliable day-to-day operation.

Highlights

  • 13-tooth design matches #40 chain pitch precisely
  • 3/4 in bore with 3/16 in keyway ensures positive torque transfer
  • Black-oxide steel finish resists corrosion in harsh environments
  • Two set screws lock sprocket securely to the shaft
  • Compact 2.33 in outside diameter fits tight machine spaces

Specifications

BrandTRITAN
TypeBearings, V-belts & Power Transmission Equipment
ColorTransparent

Questions about this item

How do I fit the 3/4 in bore sprocket onto the shaft and what step is often missed?

Slide the sprocket onto the shaft, align the 3/16 in wide by 3/32 in deep keyway with the shaft key, then tighten both included set screws against the key and shaft flats to prevent rotation.

What maintenance or replacement will the sprocket need over time?

Inspect the 13 teeth regularly for hooking or excessive wear; replace the sprocket when tooth profiles no longer mesh cleanly with 40 chain to avoid accelerated chain stretch.

What limit appears first when the sprocket runs continuously under load?

The 13-tooth pitch diameter of 2.089 in creates higher tooth loading than larger sprockets, so tooth wear and heat buildup at the 3/4 in bore interface become the limiting factors.

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