Boneham SF328HJ Slip-fixed Drill Bushing 0.257 in Id

Product Description

The BONEHAM SF328HJ is a slip-fixed drill bushing designed to guide cutting tools with precision in jig and fixture applications. Built to ANSI standards from hardened steel, this bushing achieves a hardness of 60 to 65 HRC, providing long service life in high-cycle drilling operations. The inside diameter measures 0.257 inches with a tight tolerance of +0.0001 to +0.0005 inches, ensuring accurate tool guidance with minimal deviation. Installation uses the slip-fixed method with an LS-1 compatible lock screw, allowing the bushing to be removed and replaced without disturbing the liner bushing pressed into the jig plate. This part is installed by toolmakers, machinists, and fixture builders in production and maintenance environments.

The SF328HJ is suited for use in drill jig fixtures where renewable bushing capability is required. The slip-fixed design allows quick bushing changes between operations without removing the liner from the jig plate, making it practical in multi-operation setups. The steel construction and hardened bore withstand repeated tool contact in production drilling, reaming, and countersinking applications. This bushing is appropriate for both light-duty and medium-duty fixture work across manufacturing and machine shop settings.

Key Features

• Inside diameter of 0.257 inches with tolerance of +0.0001 to +0.0005 inches for precise tool guidance
• Body outside diameter of 0.5 inches and length under head of 0.5 inches
• Head outside diameter of 51/64 inches and head height of 1/4 inch
• Hardened steel construction rated at 60 to 65 HRC for extended wear life
• Renewable bushing design compatible with LS-1 lock screw for fast field replacement
• Meets ANSI standards for drill bushing dimensional and performance requirements

Compatibility

Compatible with LS-1 lock screws. Designed as a renewable slip-fixed replacement bushing for use with standard ANSI liner bushings in drill jig plates.

Installation Notes

Installation is performed by machinists or toolmakers using standard fixture assembly practices. Ensure the liner bushing is properly seated in the jig plate before inserting the SF328HJ. Secure the bushing with an LS-1 compatible lock screw to prevent rotation during operation. Inspect the bore and seating surfaces for contamination or burrs before installation to maintain dimensional accuracy.