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Black oxide steel sprocket, 18 teeth, 3/4 inch bore with keyway and two set screws

Tritan

Tritan 50BS18H 3/4 in Bore Sprocket 50 Chain collectible

SKU CH-RPS3-HFSE8

Steel sprocket with 18 teeth, 3/4 in bore, keyway and two set screws for 50 chain

  • TypeBearings, V-belts & Power Transmission Equipment
  • ColorTransparent
  • Precision 3/4 in bore fits 50 chain drives
  • 18 teeth deliver consistent 5/8 in pitch motion
  • Black oxide finish resists corrosion in tough environments
  • Keyway with set screws locks securely to shaft
  • Compact 3.92 in diameter suits tight assemblies

Purpose and Fit

This finished-bore sprocket is built for single-strand 50 chain drives and fits a 3/4 in shaft with a 3/16 in keyway. It suits maintenance teams and OEM builders who need a direct replacement on conveyors, packaging lines or agricultural equipment.

Build and Mounting

The steel body carries a black-oxide finish and a one-side hub measuring 2 7/8 in across with a 0.657 in projection. Two set screws lock onto the keyed bore, giving a secure, repeatable fit without additional machining.

Compatibility Check

Verify that your chain is ANSI 50 (5/8 in pitch) and that the shaft diameter is exactly 3/4 in with a matching 3/32 in deep keyway. Confirm the 3.599 in pitch diameter and 1 in through-bore length clear adjacent components before ordering.

Highlights

  • Precision 3/4 in bore fits 50 chain drives
  • 18 teeth deliver consistent 5/8 in pitch motion
  • Black oxide finish resists corrosion in tough environments
  • Keyway with set screws locks securely to shaft
  • Compact 3.92 in diameter suits tight assemblies

Specifications

BrandTRITAN
TypeBearings, V-belts & Power Transmission Equipment
ColorTransparent

Questions about this item

What chain pitch does the 50BS18H sprocket engage, and what is the practical limit on chain speed?

The sprocket is cut for 5/8 in pitch chain, matching ANSI 50 series; chain speed is limited by the 3.599 in pitch diameter and the drive's power rating rather than the sprocket itself.

What shaft diameter and keyway dimensions does the 3/4 in finished bore require for mounting?

The bore accepts a 3/4 in shaft with a 3/16 in wide by 3/32 in deep keyway, and the hub projects 0.657 in with a 2 7/8 in hub diameter for set-screw clearance.

How are the two set screws installed on the 50BS18H, and which step is commonly missed?

Align the key in the keyway, slide the sprocket onto the shaft, then tighten both set screws over the key and the flat; the step often missed is torquing the second screw after the first seats the hub.

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