Browning 1880780 Finished Bore Sprocket 17T 5/8 in Pitch

Product Description

The BROWNING 1880780 is a finished bore roller chain sprocket designed for power transmission applications using ANSI No. 50 chain. Machined from steel, it features 17 teeth on a 5/8 inch pitch, a finished bore diameter of 1-1/4 inches, and an outside diameter of 3.72 inches. The hub diameter measures 2.703 inches. This sprocket ships ready to mount on a 1-1/4 inch shaft without additional machining, making it a direct drop-in component for conveyor drives, industrial equipment, and mechanical power transmission assemblies. Installation is typically performed by millwrights, maintenance technicians, or mechanical contractors.

This sprocket is suited for light-to-medium duty industrial drive systems that use ANSI No. 50 roller chain. Common applications include conveyor systems, packaging equipment, agricultural machinery, and general industrial drive trains where a 5/8 inch pitch chain and a 17-tooth count are specified. The finished bore design eliminates the need for on-site boring, making it practical for direct shaft mounting in field service or maintenance scenarios.

Key Features

• 17-tooth count on 5/8 inch pitch for use with ANSI No. 50 roller chain
• Finished bore at 1-1/4 inches — mounts directly to shaft without additional machining
• Steel construction for durability in industrial drive environments
• Outside diameter of 3.72 inches and hub diameter of 2.703 inches for precise fitment
• Minimum and maximum bore diameter are both 1-1/4 inches — no boring range, exact fit only

Compatibility

Designed for use with ANSI No. 50 roller chain at 5/8 inch pitch. Suitable as an OEM-style or replacement finished bore sprocket in any drive system specifying a 17-tooth, 5/8 inch pitch sprocket with a 1-1/4 inch shaft bore.

Installation Notes

Installation should be performed by a qualified millwright or mechanical technician. Before mounting, de-energize and lock out the drive system per applicable LOTO procedures. Verify shaft diameter matches the 1-1/4 inch finished bore before installation. Secure the sprocket with the appropriate keyway and set screw hardware per the equipment manufacturer's specifications, and ensure proper chain alignment and tension after mounting.