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Black-oxide steel sprocket, 22 teeth, 5/8 inch plain bore

Tsubaki

Tsubaki 40B22 Sprocket Plain 40 Chain 5/8 Bore 22 Teeth

SKU CH-KJKK-D598Z

Plain-bore steel sprocket with 22 teeth for single-strand 40 chain, 5/8 in bore, 3.78 in outside diameter and 1045-grade material

  • TypeSprockets
  • Precision machined 1045 steel for long wear life
  • 22 teeth on 40 chain pitch deliver smooth power transfer
  • 5/8 inch plain bore with keyway fits standard shafts
  • Black oxide finish resists corrosion in harsh environments
  • Includes set screws for secure hub locking

TSUBAKI 40B22 Sprocket Specifications

This TSUBAKI 40B22 sprocket is a steel power transmission component built for 40 chain pitch with a 5/8 inch plain bore. It features 22 teeth, a 3.78 inch outside diameter and a 3.513 inch pitch diameter. The hub measures 2 7/8 inch in diameter with a 0.716 inch projection and 1 inch length through bore. It includes set screws and a 3/16 inch keyway.

Suitable Applications And Limitations

This sprocket suits drives using single-strand 40 roller chain with a 1/2 inch pitch on a 5/8 inch shaft. The plain bore with keyway and set screws provides a secure fixed mounting for moderate torque loads. Buyers needing a taper-lock or QD bushing mounting system should look elsewhere. It is not for multi-strand chain configurations or shafts larger than the maximum 1 7/8 inch bore capacity.

Critical Fit Specification

The 5/8 inch plain bore diameter with a 3/16 inch wide by 3/32 inch deep keyway is the single specification that determines compatibility. The shaft must match this bore size exactly and accept a standard key for the set screws to lock against. Verify the shaft diameter and keyway dimensions before ordering to ensure proper power transmission.

Highlights

  • Precision machined 1045 steel for long wear life
  • 22 teeth on 40 chain pitch deliver smooth power transfer
  • 5/8 inch plain bore with keyway fits standard shafts
  • Black oxide finish resists corrosion in harsh environments
  • Includes set screws for secure hub locking

Specifications

TypeSprockets

Questions about this item

How do I install this 40 chain sprocket onto a 5/8 in shaft and what step is often missed?

Slide the plain bore onto the shaft, align the 3/16 in keyway with the shaft key, then tighten the included set screws over the key to prevent rotation.

What maintenance or replacement will this steel sprocket need over time?

Inspect the 22 teeth regularly for hooking or uneven wear; replace the sprocket when tooth profiles no longer match the 1/2 in pitch chain to avoid accelerated chain stretch.

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

The 1045 steel teeth will wear faster than the hub; once the 3.513 in pitch diameter teeth deform, chain engagement degrades and the sprocket must be replaced.

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