100 Chain Sprocket With 21 Tooth And One And One Quarter Inch Finished Bore Featuring Keyway And Two Set Screws For Secure Mounting And Reliable Power Transmission Model 100BS21-1 Durable Construction

Single 21-Tooth #100 Chain Sprocket with 1-1/4 Bore
✔️ Includes 21 teeth, 1-1/4 inch finished bore, keyway and 2 set screws

This is a #100 chain sprocket with 21 teeth and a 1-1/4 finished bore (31.75 mm). It’s designed for reliable power transmission in conveyors, agricultural equipment, and industrial machinery. It ships with a precision keyway and two set screws for secure mounting.

✅ Bore size: 1-1/4 inch (31.75 mm) finished bore with keyway and set screws
✅ Chain size: #100 roller chain
✅ Teeth: 21
✅ Bore style: BS
✅ Keyway: 1/4 x 1/8
✅ Mounting: Includes 2 set screws

💡 What is a chain sprocket and how does it fit into a drive system? A quick, practical overview for common drive setups.

- designed to mesh with #100 roller chain for reliable power transfer - 21 teeth provide balanced torque and speed for mid-range applications - bore with 1-1/4 inch finished bore and a keyway plus set screws ensures secure mounting