Boneham SF208BJ Slip-fixed Drill Bushing 0.052in Id Steel

Product Description

The BONEHAM SF208BJ is a slip-fixed drill bushing designed to guide cutting tools with precision in jig and fixture applications. Built to industry code SF, this bushing features a 0.052 inch inside diameter sized for a No. 55 wire gauge drill, a 5/16 inch body outside diameter, and a 1/2 inch length under head. The head outside diameter measures 35/64 inch with a 1/4 inch head height. Constructed from steel, it is designed for renewable installation and is counterbored to accept an LS-1 compatible lock screw. Inside diameter tolerance is held to a tight plus 0.0001 to plus 0.0004 inch range, ensuring consistent hole location across repeated drilling operations.

This bushing is used in drill jigs and production fixtures where repeatable hole placement is required. The slip-fixed configuration allows the bushing to be installed and locked in place via a lock screw, making it suitable for applications that require occasional bushing removal or replacement during a machining run. Typical users include tool and die makers, machinists, and fixture builders working in metalworking, fabrication, or precision manufacturing environments.

Key Features

• SF industry code slip-fixed design with counterbore for LS-1 lock screw
• 0.052 inch inside diameter (No. 55 wire gauge) with tolerance of plus 0.0001 to plus 0.0004 inch
• 5/16 inch body outside diameter and 1/2 inch length under head
• 35/64 inch head outside diameter and 1/4 inch head height
• Steel construction for durability in repetitive drilling operations
• Renewable bushing design allows replacement without disturbing the jig plate

Compatibility

Designed as an OEM-style replacement or direct fit for drill jig fixtures requiring an SF-series slip-fixed bushing with LS-1 lock screw compatibility.

Installation Notes

Installation is typically performed by machinists or tool and die technicians. The bushing is pressed or slipped into a counterbored liner bushing already installed in the jig plate, then secured with an LS-1 lock screw. Ensure the mating liner bushing bore and the jig plate are clean and free of chips or burrs before seating. Always verify drill press or machining center is fully stopped and de-energized before changing or inspecting bushings.