Boneham SF325GT Slip-fixed Drill Bushing 0.228 in Id

Product Description

The BONEHAM SF325GT is a slip-fixed drill bushing designed to guide cutting tools with precision in jig and fixture applications. Built to industry code SF, this bushing features a 0.228 inch inside diameter, a 1/2 inch body outside diameter, and a 5/16 inch length under head. The steel construction provides the wear resistance and dimensional stability required in high-repetition drilling operations. It includes a head for positive seating against the jig plate and is renewable, allowing replacement without scrapping the liner bushing. This component is installed by machinists and tooling technicians in production and maintenance environments.

The SF325GT suits slip-fixed bushing applications where the bushing must be locked in place during drilling and removed for tool changes or part indexing. It is appropriate for use in drill jigs across light manufacturing, fabrication shops, and toolroom setups. The bushing accepts a compatible LS-1 lock screw to secure it in position during operation, making it suitable for moderate to high cycle-count applications where positional repeatability is critical.

Key Features

• Slip-fixed SF industry code design for use with renewable liner bushings
• 0.228 inch inside diameter with tight tolerance of plus 0.0001 to plus 0.0004 inches for accurate tool guidance
• 1/2 inch body outside diameter and 5/16 inch length under head for standard jig plate fitment
• Steel construction for wear resistance and long service life in repetitive drilling operations
• Headed design with 51/64 inch head outside diameter and 1/4 inch head height for positive shoulder seating
• Compatible with LS-1 lock screw for secure retention during drilling cycles
• Renewable bushing — replaceable in the field without full fixture disassembly

Compatibility

Designed for use with LS-1 compatible lock screws and renewable liner bushings following SF industry standards for slip-fixed drill bushing applications.

Installation Notes

Installation is performed by tooling or maintenance personnel familiar with drill jig assembly. Ensure the liner bushing and jig plate bore are clean and free of burrs before pressing or seating the bushing. Secure the SF325GT using a compatible LS-1 lock screw and verify that the bushing seats flush against the jig plate head surface before commencing drilling operations. Do not force the bushing into an undersized bore, as this may distort the inside diameter and compromise tool guidance accuracy.