Boneham SFT286HS Slip-fixed Drill Bushing 0.272 in Id Steel

Product Description

The BONEHAM SFT286HS is a slip-fixed drill bushing designed to guide cutting tools with precision during drilling, reaming, and boring operations. Classified under industry code SF, this bushing features a 0.272-inch inside diameter with a close tolerance of +0.0001 to +0.0005 inches, ensuring accurate and repeatable hole placement. The body outside diameter measures 0.4375 inches (7/16 inch) with a 5/8-inch head outside diameter and a 1/4-inch head height. Constructed from steel, it is a renewable bushing that accepts a lock screw for secure seating in a drill jig plate. It is installed by machinists and tooling technicians in production and maintenance shop environments.

This slip-fixed bushing is suited for drill jig applications where the bushing must be held stationary while the cutting tool passes through. The SF configuration allows the bushing to be installed and removed without special tooling, making it practical for jigs that require periodic bushing changes between operations. The 3/8-inch length under head positions the bushing correctly within a jig plate, and compatibility with the LS-TW-2 lock screw ensures it stays locked during use. Typical applications include metalworking production lines, fixture-guided drilling setups, and toolroom jig fabrication.

Key Features

• Slip-fixed (SF) installation method allows easy field removal and replacement
• Inside diameter tolerance of +0.0001 to +0.0005 inches for precise tool guidance
• Steel construction provides durability under repeated drilling cycles
• Renewable design extends jig plate service life by replacing only the bushing
• Compatible with LS-TW-2 lock screw for secure retention during operation
• Head type with 5/8-inch head OD and 1/4-inch head height for positive plate seating

Compatibility

Compatible with LS-TW-2 lock screws. Designed as an OEM-style renewable slip-fixed drill bushing for standard drill jig plates accepting SF-series bushings with a 7/16-inch body outside diameter.

Installation Notes

Installation is performed by machinists or tooling technicians. Ensure the jig plate counterbore is clean and free of chips before seating the bushing. Secure the bushing using the specified LS-TW-2 lock screw to prevent rotation or displacement during drilling. Verify inside diameter alignment with the jig design before committing to production runs.