Rugged Type B Roller Chain Sprocket With 21 Teeth And 1 Inch Bore For One Half Inch Pitch Chains Rust Resistant Hardened Teeth HRC 38 42 Made From AISI 1045 Steel Quarter Inch Keyway Plus Two Setscrews Heavy Duty By RHKING

Rugged Type B 21-Tooth Sprocket, 1in Bore, 1/2in Pitch, 1pc
✔️ 21 teeth, bore 1.0 in, keyway 0.25 in, two 90° setscrews

Designed for heavy-duty drive systems using standard 1/2 inch pitch roller chains, this Type B sprocket delivers reliable power transfer and long service life in conveyors, agricultural machinery, and industrial equipment demanding tough wear resistance and low maintenance.

Dimension	Metric	Imperial
Pitch	12.7 mm	1/2 in
Teeth	21	21
Bore	25.4 mm	1.0 in
Keyway	6.35 mm	0.25 in

✅ Pitch: 12.7 mm (1/2 in) pitch for compatible roller chains
✅ Teeth: 21, hardened for wear resistance (HRC 38-42)
✅ Bore: 1.0 in, with 0.25 in keyway and 2 setscrews at 90°
✅ Material: AISI 1045 medium carbon steel with high-temperature quenching
✅ Finish: blackened surface for rust and corrosion resistance
✅ Package: 1 sprocket with 2 setscrews included

💡 What is a roller chain sprocket used for in a heavy-duty drive system?

In short, it handles power transfer between a shaft and a chain in demanding setups.

• Handy for conveyors, manufacturing lines, and farming equipment using 1/2 in pitch chains
• Made from AISI 1045 steel with hardened teeth for long wear life
• Secure mounting with a 1 in bore, keyway, and two setscrews for stable operation
• Low maintenance with minimal lubrication requirements in dirty or harsh environments