Boneham SFT286HU Slip-fixed Drill Bushing 0.277 in Id Steel

Product Description

The BONEHAM SFT286HU is a slip-fixed drill bushing designed to guide cutting tools accurately through jig plates in precision machining and fabrication operations. Built to industry code SF, this bushing features a 0.277 inch inside diameter (Letter J), a 7/16 inch body outside diameter, and a 3/8 inch length under the head. The head-type design seats firmly against the jig plate surface, and the renewable construction allows the bushing to be removed and replaced without disturbing the jig body. Machined from steel, the SFT286HU delivers the dimensional stability and wear resistance required in production drilling environments.

This bushing is suited for use in drill jigs and fixtures across toolroom, job shop, and production floor applications. The slip-fixed design allows the bushing to be locked in position during drilling and removed for tool changes or inspection without special equipment. It is commonly installed by machinists, tool and die makers, and fixture builders working to close positional tolerances. The LS-TW-2 compatible lock screw interface provides a secure, repeatable seating position for every use cycle.

Key Features

• Slip-fixed (SF) installation method for tool-change convenience and repeatable positioning
• 0.277 inch inside diameter with a tight tolerance of +0.0001 to +0.0005 inches for accurate tool guidance
• 7/16 inch body outside diameter and 3/8 inch length under the head for standard jig plate fitment
• Head-type design with 5/8 inch head outside diameter and 1/4 inch head height
• Renewable bushing construction allows replacement in place without re-machining the jig liner
• Compatible with LS-TW-2 lock screw for positive retention during cutting operations

Compatibility

Designed as an OEM-style replacement or direct-fit slip-fixed drill bushing for standard drill jig liners accepting a 7/16 inch body outside diameter SF-code bushing with LS-TW-2 lock screw compatibility.

Installation Notes

Installation is typically performed by a machinist or tool and die maker. Before installing or removing the bushing, ensure the jig plate and associated workholding equipment are secured and all cutting tools are clear of the work area. The slip-fixed bushing engages the liner with a rotation-lock action using the LS-TW-2 lock screw — confirm the lock screw is fully seated before beginning any drilling operation. Inspect the inside diameter and head seating surface for wear or damage at each bushing change interval.