Boneham SF4812KG Slip-fixed Drill Bushing 13/32 in Steel

Product Description

The BONEHAM SF4812KG is a slip-fixed drill bushing designed for precision locating and guiding of cutting tools in jig and fixture applications. Built to the SF industry code, it features a 13/32 inch inside diameter and a 3/4 inch body outside diameter with a 3/4 inch length under the head. Constructed from hardened steel with a surface hardness of 60 to 65 HRC, this bushing delivers consistent bore accuracy with an inside diameter tolerance of +0.0001 to +0.0005 inches. Installed by tool and die makers, machinists, and fixture builders, the SF4812KG is a renewable component that can be replaced without replacing the entire fixture liner.

This bushing is suited for use in drill jigs and precision fixtures in manufacturing, machining, and fabrication environments. The slip-fixed configuration allows the bushing to be locked in place using an LS-1 compatible lock screw, making it appropriate for single-operation drilling setups where the bushing remains fixed during the drilling cycle. The head-style design seats against the top of the fixture plate, providing a positive stop and preventing the bushing from being pushed through the liner during operation. Applications span light to medium production runs in both job shop and production machining environments.

Key Features

• Slip-fixed SF industry code configuration with head-style design for positive seating
• Hardened steel construction rated 60 to 65 HRC for wear resistance in repetitive drilling cycles
• Inside diameter tolerance of +0.0001 to +0.0005 inches for precise tool guidance
• Renewable bushing design allows replacement within existing fixture liners
• LS-1 compatible lock screw interface for secure fixture mounting
• Meets ANSI standards for drill bushing geometry and dimensional accuracy

Compatibility

Designed as an ANSI-standard SF-type slip-fixed drill bushing for use with LS-1 compatible lock screws in standard drill jig liner applications.

Installation Notes

Installation is typically performed by machinists or tool and die makers using a bushing press or arbor press to seat the bushing into the fixture liner. Power to any associated machinery must be locked out and tagged out before servicing or replacing bushings in active fixtures. The LS-1 lock screw should be engaged to secure the bushing in position before beginning any drilling operation. Do not hammer the bushing directly without a proper press tool, as this may damage the bore finish or the fixture liner.