40B72H Type B Sprocket

Finished Bore W/Keyway and Set Screws

For #40 Roller Chain

72 Tooth

Outside Diameter = 11.750"

Pitch Diameter = 11.463"

LTB = 1 1/4"

Hub Diameter = 4"

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

Bore 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”
1-13/16” to 2-1/4” = 1/2” X 1/4”

2-5/16 to 2-3/4" = 5/8" x 5/16"

2-13/16" to 3-1/4" = 3/4" x 3/8"

3-5/16" to 3-3/4" = 7/8" x 7/16" 

3-13/16" to 4-1/2" = 1" x 1/2"