Boneham SF328FV Slip-fixed Drill Bushing 0.191 in Id Steel

Product Description

The BONEHAM SF328FV is a slip-fixed drill bushing designed to guide cutting tools accurately during drilling, reaming, and boring operations. Built to ANSI standards, this bushing features a 0.191 inch (No. 11 wire gauge) inside diameter with a tight tolerance of +0.0001 to +0.0004 inches, ensuring repeatable hole placement across production runs. The body outside diameter measures 0.5 inches with a head outside diameter of 51/64 inches and a head height of 1/4 inch. Manufactured from hardened steel at 60 to 65 HRC, it delivers long service life under high-cycle tooling conditions. Installed by machinists and toolmakers, this bushing is compatible with the LS-1 lock screw for secure retention in jig plates.

This bushing is suited for use in drill jigs and fixture plates in both job-shop and production machining environments. The slip-fixed design allows the bushing to be installed and locked in place using the LS-1 compatible lock screw, making it appropriate for operations where the same bushing remains in the fixture for extended runs. The length under head is 0.5 inches, providing adequate engagement depth for standard jig plate thicknesses. This part is classified under industry code SF and is renewable, allowing replacement without retooling the entire fixture.

Key Features

• Inside diameter of 0.191 inches (No. 11 wire) with +0.0001 to +0.0004 inch tolerance for precise tool guidance
• Hardened steel construction at 60 to 65 HRC for wear resistance in high-cycle applications
• Head-type bushing with 51/64 inch head OD and 1/4 inch head height for positive seating on jig plates
• LS-1 lock screw compatible for secure, slip-fixed retention
• Renewable bushing design allows field replacement without fixture rework
• Meets ANSI standards for drill bushing dimensions and performance

Compatibility

Designed as an ANSI-standard slip-fixed drill bushing compatible with LS-1 lock screws and suitable for use in standard jig plates and fixture systems that accept SF-series head-type bushings.

Installation Notes

Installation is typically performed by a machinist or toolmaker during jig assembly or bushing replacement. Press the bushing into the liner or jig plate bore and secure with an LS-1 lock screw to prevent rotation. Ensure the fixture and workpiece are clamped and all machine power is off before removing or installing bushings. Follow ANSI and shop-floor safety procedures when handling hardened components.