#40 Finished Bore Sprockets
Nitro #40 Roller Chain Sprockets
#40 chain sprockets are already bored to size and include a keyway and 2 setscrews. Our #40 finished bore sprockets are manufactured from 1045CD (Cold drawn) carbon steel, which is a higher grade than most sprockets on the market. Finished bore sprockets are commonly referred to as a "type B" or "type BS" sprocket. All sprocket teeth are hardened to minimize wear overtime and these are finished with a black oxide to help resist corrosion. Nitro™ 40 sprockets work with any #40 ANSI roller chain.
Sprocket Number Nomenclature

Nitro #40 Sprocket Advantage:
- Manufactured To ANSI Standards
- Quality 1045CD Material
- Hardened Teeth To Minimize Wear
- Precision Cut Teeth
- Keyway Timed With Tooth
- Black Oxide Finish For Corrosion Resistance
$8.99
Item ID: 40B9-1/2
87 In Stock
Incoming Stock:
259
/units
$10.51
Item ID: 40B12-3/4
98 In Stock
Incoming Stock:
264
/units
$11.33
Item ID: 40B14-7/8
26 In Stock
Incoming Stock:
52
/units