Boneham SF325HD Slip-fixed Drill Bushing 0.246 in Id

Product Description

The BONEHAM SF325HD is a slip-fixed drill bushing designed to guide cutting tools with precision during drilling, reaming, and boring operations. Classified under the SF industry standard, it features a 0.246 inch inside diameter (letter size D), a 0.500 inch body outside diameter, and a 0.3125 inch length under the head. Constructed from steel, this headed bushing accepts an LS-1 compatible lock screw to secure it in a drill jig liner. It is a renewable bushing, meaning it can be removed and replaced without disturbing the press-fit liner already installed in the jig plate.

This bushing is used in production drilling jigs across metalworking, machining, and fabrication environments. It suits applications where bushings need to be swapped out between operations or replaced after wear without removing the liner from the jig body. The slip-fixed design allows the bushing to be rotated into a locked position via lock screw, preventing rotation or axial movement during the cutting operation. Typical users include tool-and-die makers, machinists, and maintenance technicians working with precision jig fixtures in light to medium production settings.

Key Features

• SF industry code designation — conforms to standard slip-fixed bushing geometry
• 0.246 inch inside diameter (letter size D) with tolerance of +0.0001 to +0.0004 inches for consistent tool guidance
• Steel construction for durability in repeated drilling cycles
• Headed design with 0.8125 inch head outside diameter and 0.250 inch head height
• Renewable bushing — removable and replaceable without disturbing the installed liner
• LS-1 compatible lock screw seat for positive retention in the jig plate

Compatibility

Designed as an OEM-style renewable slip-fixed drill bushing for use with standard SF-series drill jig liners requiring LS-1 compatible lock screws.

Installation Notes

Installation is performed by machinists or tool-and-die technicians using a standard drill jig setup. Ensure the mating liner is fully seated and the jig plate is secured before inserting the bushing. Rotate the bushing to align the lock screw notch, then tighten the LS-1 compatible lock screw to secure it in position — do not overtighten, as this can distort the bushing bore. Always verify inside diameter clearance with the intended tool shank before committing to production runs.