Boneham SFT3612IU Slip-fixed Drill Bushing 21/64 in Id Steel

Product Description

The BONEHAM SFT3612IU is a slip-fixed drill bushing designed to guide cutting tools with precision during drilling, reaming, and boring operations. Built to industry code SF, this headed bushing features a 21/64 inch inside diameter and a 9/16 inch body outside diameter, making it a compact yet robust guide for close-tolerance work. Constructed from steel and renewable by design, it installs into a drill jig or fixture plate without permanent staking, allowing the bushing to be removed and replaced when worn. Compatible with LS-TW-2 lock screws for secure positioning during production runs.

The SFT3612IU is suited for use in drill jig fixtures across light manufacturing, toolroom, and precision fabrication environments. Its slip-fixed configuration makes it appropriate for applications that require tool changes at a single jig station, such as when drilling and reaming the same hole in sequence. Machinists, toolmakers, and fixture builders working in job shops or production settings are the primary installers of this component.

Key Features

• Slip-fixed (SF) installation method allows removal and replacement without damaging the fixture plate
• 21/64 inch inside diameter with a tight tolerance of +0.0001 to +0.0005 inches for consistent tool guidance
• 9/16 inch body outside diameter with a 7/8 inch head outside diameter for positive seating
• 3/4 inch length under head provides adequate drill guidance depth for standard jig plate thicknesses
• Steel construction for durability under repeated tooling contact
• Compatible with LS-TW-2 lock screw to prevent rotation or lift during cutting operations
• Renewable bushing design extends fixture service life by allowing worn bushings to be swapped out

Compatibility

Designed for use with LS-TW-2 compatible lock screws. Fits drill jig fixtures accepting SF-style slip-fixed bushings with a 9/16 inch body outside diameter. Verify liner bushing inside diameter matches body OD before installation.

Installation Notes

Installation is typically performed by toolmakers or machinists using a bushing press or hand press to seat the bushing into a matching liner bushing already fixed in the jig plate. Ensure the fixture is secured and the mating liner is free of chips or burrs before pressing the slip bushing into position. Engage the LS-TW-2 lock screw to prevent the bushing from rotating or lifting during the cutting operation. Remove the lock screw before extracting the bushing for tool changes or replacement.