40 Chain Sprocket With 21 Tooth And 7/8 Finished Bore With Keyway And Set Screws For Secure Mounting And Precise Alignment Designed For Reliable Power Transmission In Industrial, Agricultural, And Machinery Applications Ready To Install Model 40BS21-7/8

Single #40 Chain Sprocket with 21 Teeth and 7/8 Bore
✔️ 21-tooth #40 chain sprocket with 7/8 bore, keyway & 2 screws

Designed for power transmission in conveyors, industrial machines, and agricultural equipment, this sprocket pairs with #40 roller chain to transfer rotation efficiently. It ships ready to install with a precision keyway and two set screws for secure mounting.

✅ Bore Size: 7/8" finished bore
✅ Chain Size: #40 roller chain
✅ Teeth: 21
✅ Bore Style: BS
✅ Keyway: 3/16 x 3/32
✅ Mounting: Includes 2 set screws

💡 What is a chain sprocket used for in power transmission?

A handy component that meshes with a chain to transfer rotational motion to driven equipment, helping to control speed and torque.

• Drives chain along the correct pitch for smooth motion
• Maintains timing between sprockets for consistent speeds
• Built with a finished bore, keyway, and set screws for secure mounting
• Ideal for conveyors, agricultural machinery, and general drive systems