40 Chain Sprocket 9 Tooth One Half Inch Finished Bore With Keyway And Set Screws For Secure Mounting And Reliable Power Transmission Ideal For Industrial Machinery Conveyors And Automotive Applications Precision Toleranced For Low Backlash

High-Strength #40 chain sprocket with 9 teeth and 1/2 bore
✔️ 9 teeth, 1/2 bore, keyway, two set screws included

This #40 chain sprocket with 9 teeth and 1/2 finished bore is a sturdy drive component used in conveyors, agricultural equipment, and general power-transmission systems.

✅ Bore: 1/2 finished bore with keyway
✅ Chain size: #40 roller chain
✅ Teeth: 9
✅ Keyway: 1/8 x 1/16
✅ Mounting: 2 set screws

Bore size	12.7 mm (1/2 in)
Chain size	#40 roller chain
Teeth	9
Keyway	3.175 mm x 1.5875 mm (1/8 x 1/16 in)
Mounting	2 set screws

💡 What is a handy long-tail question to ask about chain sprockets for small power systems?

Short intro: It’s a practical question buyers use to judge fit and reliability in real setups.

- How well does a 1/2 bore fit common shafts in compact drives - Will the included keyway and set screws prevent bolt slip under load - Is this #40 sprocket compatible with existing conveyors and machinery