Boneham SF8828NH Slip-fixed Drill Bushing 25/32 in Id

Product Description

The BONEHAM SF8828NH is a slip-fixed drill bushing designed for precision hole-location guidance in jig and fixture applications. Built to the SF industry standard, this bushing features a 25/32-inch inside diameter and a 1-3/8-inch body outside diameter, with a 1-3/4-inch length under the head. Manufactured from steel with a hardness rating of 60 to 65 HRC, it delivers the wear resistance required for repeated drilling, reaming, or boring cycles in production environments. A head outside diameter of 1-51/64 inches and a 3/8-inch head height provide secure seating against the jig plate surface. This is a renewable bushing, meaning it can be replaced without retooling the liner bushing in the fixture.

The SF8828NH is used in drill jig assemblies where a slip-in, fixed-position bushing is required. The slip-fixed design allows the bushing to be installed and locked in a liner bushing using an LS-2 compatible lock screw, holding the bushing stationary during the cutting operation. This configuration is standard in high-cycle production jigs found in metalworking, fabrication, and machining shops. It is suitable for applications requiring tight inside-diameter tolerance control, with an ID tolerance of plus 0.0002 to plus 0.0006 inches above nominal.

Key Features

• SF-type slip-fixed design locks in place via LS-2 compatible lock screw for stationary operation during drilling
• 25/32-inch inside diameter with a controlled ID tolerance of plus 0.0002 to plus 0.0006 inches for precision hole guidance
• Steel construction hardened to 60 to 65 HRC for extended wear life in high-cycle jig applications
• Renewable bushing design — replaceable within an existing liner bushing without fixture modification
• 1-3/4-inch length under head provides adequate tool guidance depth for typical production drilling setups
• Meets ANSI standards for drill bushing geometry and dimensional consistency

Compatibility

Designed as an ANSI-standard SF-type slip-fixed renewable drill bushing compatible with LS-2 lock screws and standard SF liner bushings used in drill jig assemblies.

Installation Notes

Installation is performed by machinists or toolmakers setting up or maintaining drill jigs and fixtures. The bushing should be inserted into the mating liner bushing and secured with an LS-2 compatible lock screw before commencing any drilling operation. Ensure the fixture and workpiece are properly clamped and the machine is at a complete stop before replacing or repositioning the bushing. Handle hardened bushings carefully to avoid chipping the bore surface during installation or removal.