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Steel roller chain sprocket with black oxide finish, 26 teeth, 7/8 inch bore with keyway and set screws

Tritan

Tritan 40BS26H 7/8 in Bore Roller Chain Sprocket Collectible

SKU CH-6JPV-YES1P

A finished-bore roller chain sprocket with a 7/8 in bore, 26 teeth and black-oxide steel construction

  • TypeBearings, V-belts & Power Transmission Equipment
  • ColorTransparent
  • 26-tooth design matches #40 chain pitch precisely
  • 7/8 in finished bore with 3/16 in keyway installs directly
  • Black-oxide steel resists wear in power-transmission use
  • Two set screws lock sprocket securely to shaft
  • 42 in outside diameter fits standard 40-series drives

Purpose-built power transmission

This finished-bore roller chain sprocket transmits rotary motion between a 1/2 in pitch single-strand chain and a 7/8 in shaft. It is intended for maintenance crews and OEM assemblers who need a direct replacement for worn ANSI 40 sprockets on conveyors, packaging lines or agricultural drives.

Upgrade path and fitment

The sprocket replaces any 26-tooth ANSI 40 sprocket with a 7/8 in bore, a 3 1/4 in hub and a 3/16 in keyway. The jump is worth it when the existing hub is cracked, the keyway is wallowed out or the teeth show measurable hook wear that shortens chain life.

Chain-pitch and bore constraints

The 1/2 in pitch fixes the tooth geometry, so the sprocket cannot mesh with 3/8 in or 5/8 in chains. The fixed 7/8 in bore and single keyway prevent use on larger shafts or on applications that demand a split hub or a different keyway width.

Highlights

  • 26-tooth design matches #40 chain pitch precisely
  • 7/8 in finished bore with 3/16 in keyway installs directly
  • Black-oxide steel resists wear in power-transmission use
  • Two set screws lock sprocket securely to shaft
  • 42 in outside diameter fits standard 40-series drives

Specifications

BrandTRITAN
TypeBearings, V-belts & Power Transmission Equipment
ColorTransparent

Questions about this item

What shaft size fits the 7/8 in bore and 3/16 in keyway?

The sprocket accepts a 7/8 in shaft with a 3/16 in keyway; two set screws lock it in place.

How do I install the sprocket and which step is often missed?

Slide it onto the shaft, align the key in the keyway, then tighten both set screws — skipping the second screw is the common error.

When will the chain or sprocket need replacement?

Replace when chain stretch exceeds the 1/2 in pitch tolerance or when the 26 teeth show visible hooking or thinning.

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