Sprockets

This is an unused roller chain sprocket made by Martin or Boston, part number 35B40.

• Buyer will receive either a Martin or Boston sprocket, these are equal quality and may have small rust spots due to long term storage. This will not affect operation.
• The Martin sprocket has a removable keyed bushing, 2 setscrews hold this in place, the Boston center is not removable.
• Please call or email if you have a preference.
• 40 Tooth
• # 35 standard roller chain
• B hub
• Pitch: 3/8 inch
• Pitch diameter: 4.78 inches
• Bore of keyed bushing: 1/2 inch
• Bore without bushing (Martin): 3/4 inch
• Can be bored up to 1.5 inches