Boneham SF488JJ Slip-fixed Drill Bushing 23/64 in Id

Product Description

The BONEHAM SF488JJ is a slip-fixed drill bushing designed for precision hole location in jig and fixture applications. Manufactured from steel with a hardness rating of 60 to 65 HRC, this bushing provides a renewable, wear-resistant guide surface for drill bits and reamers. It features a 23/64-inch inside diameter, a 3/4-inch body outside diameter, and a 1/2-inch length under head. The headed design seats securely in a counterbored jig plate and locks in place using an LS-1 compatible lock screw. Machinists, tool-and-die makers, and precision fabricators install this type of bushing when repeatable hole location across production runs is required.

The SF488JJ suits production jigs and fixtures where the bushing must be retained positively during drilling or reaming operations. The slip-fixed installation method means the bushing is inserted and secured with a lock screw rather than pressed permanently into the liner. This allows the bushing to be removed and replaced once wear tolerance is exceeded, extending the service life of the jig plate itself. Typical applications include metal fabrication shops, aerospace component drilling fixtures, and general manufacturing tooling where ANSI-standard drill bushing dimensions are specified.

Key Features

• Slip-fixed installation method with LS-1 compatible lock screw for secure, removable retention
• Steel construction hardened to 60 to 65 HRC for extended wear resistance under repeated drilling cycles
• Renewable bushing design allows field replacement without scrapping the jig plate
• Headed style with a 1-3/64-inch head outside diameter and 1/4-inch head height for positive seating in counterbored fixtures
• Meets ANSI standards for drill bushing dimensions and tolerances
• Inside diameter tolerance held to +0.0001 to +0.0005 inches for precise tool guidance

Compatibility

Designed as an ANSI-standard slip-fixed drill bushing compatible with LS-1 lock screws. Fits counterbored jig plates and fixtures dimensioned to accept a 3/4-inch body outside diameter slip-fixed bushing per ANSI bushing standards.

Installation Notes

Installation is performed by tool-and-die makers or machinists setting up production drilling fixtures. Ensure the jig plate counterbore is clean and dimensioned to the correct body outside diameter before inserting the bushing. Secure the bushing with an LS-1 compatible lock screw and verify seating before initiating any drilling cycle. Inspect the inside diameter periodically for wear and replace the bushing once it falls outside specified tolerance to maintain hole-location accuracy.