Boneham SF6412NH Slip-fixed Drill Bushing 25/32 in Id

Product Description

The BONEHAM SF6412NH is a slip-fixed drill bushing designed for precision tooling and jig applications in metal fabrication and machining environments. Built from hardened steel with a Rockwell hardness of 60 to 65 HRC, this bushing provides accurate drill guidance and long service life under repeated use. It features a 25/32 inch inside diameter with a tight tolerance of plus 0.0002 to plus 0.0006 inches, a 1 inch body outside diameter, and a 3/4 inch length under the head. The head-style design and LS-2 compatible lock screw interface allow for secure, removable installation in a drill jig plate. Meets ANSI standards for interchangeable tooling bushings.

This bushing is suited for production machining operations where renewable, slip-in replaceable bushings are required. The slip-fixed configuration allows the bushing to be locked in place during drilling operations and removed for tool changes or bushing replacement without disturbing the jig body. Machinists, tool and die makers, and precision fabrication shops install this type of bushing in drill jig fixtures for high-volume or repetitive hole-location work. The renewable design reduces tooling cost over time by allowing worn bushings to be swapped without replacing the entire jig liner.

Key Features

• 25/32 inch inside diameter with ANSI-standard tolerance of plus 0.0002 to plus 0.0006 inches for precise drill guidance
• Hardened steel construction rated 60 to 65 HRC for extended wear resistance
• 3/4 inch length under head suits standard jig plate thicknesses
• Head outside diameter of 1-27/64 inches and 3/8 inch head height for positive seating against the jig plate
• LS-2 compatible lock screw interface for secure, tool-free removal
• Renewable bushing design allows field replacement without jig rework
• Meets ANSI standards for slip-fixed tooling bushings

Compatibility

Designed as an ANSI-standard slip-fixed renewable bushing compatible with LS-2 lock screws. Fits standard drill jig liner installations requiring a 1 inch body outside diameter slip-fixed bushing per ANSI specification code SF.

Installation Notes

Installation is performed by machinists or tooling specialists during jig setup or bushing replacement. Ensure the mating liner or jig plate bore is clean and free of burrs before inserting the bushing. The lock screw should be engaged before beginning any drilling operation to prevent bushing rotation or withdrawal. Always de-energize or lock out associated machine tooling before servicing jig fixtures.