Boneham SFT246GQ Slip-fixed Drill Bushing 0.221 in Id

Product Description

The BONEHAM SFT246GQ is a slip-fixed drill bushing designed to guide drill bits and reamers with precision in jig and fixture applications. Carrying industry code SF, this bushing features a 0.221 inch inside diameter and a 3/8 inch body outside diameter, with a head outside diameter of 5/8 inch and a head height of 1/4 inch. The length under head measures 3/8 inch. Manufactured from steel and hardened to 60 to 65 HRC, the SFT246GQ delivers consistent bore alignment and wear resistance in production drilling setups. It is installed and serviced by machinists, tool-and-die makers, and precision fabrication shops.

This bushing is suited for use in drill jigs and tooling fixtures where a renewable, slip-in bushing is required. The slip-fixed design allows the bushing to be locked in the jig plate using a compatible lock screw, then removed for replacement when the bore wears beyond tolerance. Typical applications include production machining environments where hole location accuracy must be maintained across high-volume runs. The SFT246GQ accepts a Number 2 wire-size drill or equivalent decimal tool and is compatible with the LS-TW-2 lock screw for secure retention during operation.

Key Features

• Slip-fixed (SF) installation method allows tool-free removal and renewable bushing replacement
• Inside diameter of 0.221 inches with a tight tolerance of plus 0.0001 to plus 0.0004 inches for precise drill guidance
• Steel construction hardened to 60 to 65 HRC for extended wear life in production environments
• Head-type design with 5/8 inch head outside diameter and 1/4 inch head height for positive seating in jig plate
• Compatible with LS-TW-2 lock screw for secure locking during drilling operations
• Meets ANSI standards for drill bushing geometry and tolerancing

Compatibility

Designed for use with the LS-TW-2 compatible lock screw. Fits standard jig plates machined to accept SF-series slip-fixed drill bushings with a 3/8 inch body outside diameter per ANSI drill bushing standards.

Installation Notes

Installation is performed by machinists or tool-and-die professionals using a press or light mallet to seat the bushing into a properly reamed jig plate bore. The mating bore in the jig plate must be finished to the correct clearance tolerance for the 3/8 inch body outside diameter before installation. Secure the bushing with the appropriate LS-TW-2 lock screw before initiating drilling operations. Remove all tooling and de-energize any associated machinery before servicing or replacing the bushing.