Boneham SF205EG Slip-fixed Drill Bushing 9/64 in Id Steel

Product Description

The BONEHAM SF205EG is a slip-fixed drill bushing designed to guide cutting tools with precision during drilling, reaming, and boring operations. Classified under industry code SF, this bushing features a 9/64 inch inside diameter and a 0.3125 inch (5/16 inch) body outside diameter. The head-type design provides a positive seating surface against the jig plate, while the renewable construction allows the bushing to be removed and replaced without disturbing the liner bushing press-fitted in the jig. Inside diameter tolerance is held to a tight +0.0001 to +0.0004 inch band, which is standard for precision tooling jig work. Machinists, tool and die makers, and fixture builders install this component in production and prototype drilling jigs.

This bushing is suited for use in drill jigs and fixture plates where repeatable hole location is required across multiple workpieces. The slip-fixed style locks in place using an LS-1 compatible lock screw, preventing rotation and axial movement during the cut while still allowing the bushing to be exchanged when worn or when a different tool diameter is needed. Typical applications include production machining environments, quality-controlled assembly fixtures, and toolroom fabrication work. The steel construction holds up to the abrasion of continuous chip and coolant exposure common in metal-cutting operations.

Key Features

• SF industry code slip-fixed design locks in place with LS-1 compatible lock screw
• Inside diameter tolerance +0.0001 to +0.0004 inch for precise tool guidance
• Head-type construction with 35/64 inch head outside diameter and 1/4 inch head height
• 5/16 inch length under head fits standard jig plate thicknesses
• Renewable bushing — replaceable without removing the liner from the jig
• Steel construction for durability in continuous metal-cutting applications

Compatibility

Designed for use with LS-1 compatible lock screws. Fits standard liner bushings sized to accept an SF-series slip-fixed bushing with a 5/16 inch body outside diameter. Specific liner bushing compatibility should be confirmed against jig plate and liner specifications on the assembly drawing.

Installation Notes

Installation is performed by toolmakers or machinists during jig assembly or bushing replacement. The bushing is inserted into the corresponding press-fit liner bushing and secured by tightening the LS-1 compatible lock screw to prevent rotation during drilling. Ensure the jig plate and liner are clean and free of chips or burrs before seating the bushing. Always verify inside diameter and body OD tolerances against the tool and liner specifications before installation to confirm proper fit.