Boneham SF4828JJ Slip-fixed Drill Bushing 23/64 in Id

Product Description

The BONEHAM SF4828JJ is a slip-fixed drill bushing designed to guide cutting tools with precision in jig and fixture applications. Built to the SF industry standard, it features a 23/64 inch inside diameter and a 0.750 inch body outside diameter, with a 1-3/4 inch length under the head. The bushing is machined from steel and hardened to 60 to 65 HRC for long service life under repeated drilling cycles. The headed design allows the bushing to seat against the jig plate surface for consistent tool positioning. An LS-1 compatible lock screw secures the bushing in its liner during operation.

This bushing is suited for use in production drilling jigs and precision fixtures across metalworking, toolmaking, and machining environments. The slip-fixed installation method allows the bushing to be removed and replaced without disturbing the liner, making it practical for setups that require tool changes or bushing swaps between operations. It is renewable, so worn bushings can be exchanged individually rather than reworking the fixture plate.

Key Features

• SF industry-standard slip-fixed bushing for use with a mating liner
• 23/64 inch inside diameter with a close tolerance of +0.0001 to +0.0005 inch for accurate tool guidance
• Steel construction hardened to 60 to 65 HRC for wear resistance
• Headed design seats flush against the jig plate for repeatable depth control
• LS-1 compatible lock screw interface secures the bushing in position during drilling
• Renewable bushing — replaceable without modifying the jig plate or liner
• Meets ANSI standards

Compatibility

Designed as an SF-type slip-fixed renewable drill bushing for use with a compatible SF liner and LS-1 lock screw in standard drill jig assemblies.

Installation Notes

Installation is typically performed by toolmakers or machining setup personnel. The slip-fixed bushing seats into a press-fit liner that has already been installed in the jig plate — do not attempt to press the bushing directly into the plate without a liner. Ensure the lock screw groove is properly aligned before engaging the LS-1 lock screw. Inspect the bore and mating liner for chips or debris before installing a replacement bushing.