Boneham SF326HU Slip-fixed Drill Bushing 0.277 in Id

Product Description

The BONEHAM SF326HU is a slip-fixed drill bushing designed to guide cutting tools with precision in jig and fixture applications. Built to ANSI standards, this SF-series bushing features a 0.277 inch (Letter J) inside diameter, a 1/2 inch body outside diameter, and a 3/8 inch length under the head. Constructed from steel and hardened to 60 to 65 HRC, it delivers the wear resistance required for high-cycle production drilling. The head-style configuration seats securely in the jig plate while the renewable design allows for in-field replacement without scrapping the entire fixture setup.

This bushing is suited for production and toolroom environments where repeatable hole location is critical. It installs into a prepared jig plate bore and is held in position with an LS-1 compatible lock screw, preventing rotation and axial movement during operation. Typical users include tool-and-die makers, machinist toolroom technicians, and fixture builders working in metal fabrication, aerospace, and general manufacturing settings. The SF designation indicates a slip-fixed bushing per ANSI jig bushing standards.

Key Features

• Steel construction hardened to 60 to 65 HRC for extended wear life in high-cycle drilling
• 0.277 inch (Letter J) inside diameter with a tight tolerance of +0.0001 to +0.0005 inches
• 1/2 inch body outside diameter and 3/8 inch length under head for compact fixture integration
• Head-style design with 51/64 inch head outside diameter and 1/4 inch head height
• Renewable bushing construction allows replacement without replacing the jig plate liner
• LS-1 compatible lock screw interface secures the bushing against rotation and pullout

Compatibility

Designed as an ANSI SF-series slip-fixed drill bushing; compatible with LS-1 lock screws. Verify bore preparation and lock screw specification against your fixture design before installation.

Installation Notes

Installation is performed by qualified toolroom machinists or fixture technicians. The jig plate must be bored and reamed to the correct liner or press-fit specification prior to installing an SF-series bushing. Ensure the mating lock screw is an LS-1 compatible type and is fully seated before operating the fixture. De-energize all machine power and secure the workpiece fixture before removing or replacing a worn bushing.