Boneham SF6412MM Slip-fixed Drill Bushing 21/32 in Id

Product Description

The BONEHAM SF6412MM is a slip-fixed drill bushing used to guide cutting tools with precision in jig and fixture applications. Manufactured from steel with a hardness of 60 to 65 HRC, it provides consistent bore alignment under repeated tool cycling. The 21/32 inch inside diameter and 1 inch body outside diameter make it a standard SF-series component sized for production tooling setups. It ships individually and is compatible with an LS-2 lock screw for positive retention in the liner bushing. Toolmakers and fixture builders working in machining environments rely on this type of component to maintain hole location accuracy across high-volume part runs.

This bushing is suited for use in drill jigs, machining fixtures, and production tooling wherever a renewable, slip-removable guide bushing is required. The SF industry code designation indicates a standard slip-fixed configuration per ANSI specifications, making it a direct fit in applications calling out that bushing type. The head design provides a bearing surface against the jig plate, and the 3/4 inch length under head accommodates typical jig plate thicknesses. This part is appropriate for both general metalworking and precision machining environments in tool and die, aerospace, automotive, and industrial manufacturing shops.

Key Features

• SF-series slip-fixed configuration per ANSI standard for interchangeability with standard liner bushings
• Steel construction with 60 to 65 HRC hardness for wear resistance under repeated tool cycling
• 21/32 inch inside diameter with a tight tolerance of +0.0001 to +0.0005 inches for precise tool guidance
• Head outside diameter of 1-27/64 inches and head height of 3/8 inch for positive seating on jig plate
• LS-2 lock screw compatible for secure retention in the installed liner bushing
• Renewable design allows bushing replacement without disturbing the jig plate or liner

Compatibility

Designed as an ANSI-conforming SF-series slip-fixed bushing compatible with LS-2 lock screws and standard liner bushings sized for a 1 inch body outside diameter.

Installation Notes

Installation is typically performed by toolmakers or machining fixture technicians. The slip-fixed bushing is inserted into a press-fit liner bushing already installed in the jig plate and is locked in position using an LS-2 lock screw. Ensure the mating liner bushing bore and the jig plate surface are clean and free of chips or burrs before seating the bushing. To remove or replace the bushing, release the lock screw and lift the bushing clear of the liner without applying lateral force that could damage the liner bore.