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Sprocket 40B72H Heat treated Type B for #40 roller chain 72 tooth

Heat Treated Type B Sprocket 

Fits #40 Roller Chain

72 Teeth  Finished Bore With Keyway and 2 Set Screws

Outside dia 11.75,

L.T.B.1.25,

FREE SHIPPING IN LOWER 48 STATES

Standard Keyway Sizes
Listed are the standard keyway sizes furnished with corresponding bore sizes. 

Bore To Keyway
1/2” to 9/16” = 1/8” X 1/16”
5/8” to 7/8” = 3/16” X 3/32”
15/16” to 1-1/4” = 1/4” X 1/8”
1-5/16” to 1-3/8” = 5/16” X 5/32”
1-7/16” to 1-3/4” = 3/8” X 3/16”
1-3/16” to 2-1/4” = 1/2” X 1/4”