40B21-1 21 Tooth Roller Chain Sprocket Type B With 1 Inch Bore For ANSI 40 Chain Hardened 1045 Carbon Steel Anti Rust Drive Sprocket One Quarter By One Eighth Keyway And Two Setscrews At 90 Degrees Heavy Duty And Long Lasting

Heavy-Duty ANSI 40 Chain Sprocket, 21 Teeth, 1 in Bore
✔️ 21-tooth Type B, 1 in bore, 1/4x1/8 keyway, 2 screws, wrench

This single sprocket is designed for ANSI #40 roller chain with a 1 inch bore and 21 teeth. It’s built for tough power transmission tasks in agricultural machinery, woodworking equipment, and general machine tools.

✅ ANSI #40 chain compatibility, Type B design, 21 teeth
✅ 1 in bore for standard shafts
✅ Teeth hardened to HRC 38-42 with high-frequency quenching
✅ 1045 carbon steel with blackened, anti-rust finish
✅ Includes 2 screws at 90 degrees and a wrench
✅ Suitable for heavy-duty drive in harsh environments

💡 What is a common use case for a chain sprocket of this size?

This handy drive part is used in power transmission where reliable torque transfer is needed across equipment and machinery.

• High-strength ANSI #40 chain compatibility for long life
• 1 inch bore fits standard shafts with straightforward mounting
• 21-tooth Type B geometry ensures smooth chain engagement
• Durable 1045 carbon steel body with corrosion-resistant black finish