Boneham P328HJ Press Fit Headless Drill Bushing

Product Description

The BONEHAM P328HJ is a press fit headless drill bushing used to guide cutting tools with precision during drilling, reaming, and boring operations. Manufactured from steel with a hardness rating of 60 to 65 HRC, this bushing holds tight tolerances for consistent hole location and repeatability. The inside diameter measures 0.257 inches with a tolerance of +0.0001 to +0.0005 inches, and the body outside diameter is 0.5 inches. Overall bushing length is also 0.5 inches. The headless design allows the bushing to sit flush within a jig plate without a protruding flange, making it well suited for close-tolerance tooling fixtures. Machinists and tool and die makers install this component in production and maintenance environments.

This drill bushing is intended for use in drill jigs and fixture plates where repeatable hole guidance is required. The press fit installation method means the bushing is driven directly into a prepared hole in the jig body without the need for a locking mechanism or retaining screw. It is a permanent-style bushing, not renewable or interchangeable. Industry bushing code P and inside diameter letter designation F apply, making this part identifiable within standard ANSI drill bushing sizing charts. Typical applications include metalworking production lines, custom fixturing, and maintenance repair operations requiring accurate hole guidance.

Key Features

• Press fit installation — no locking collar or retainer required
• Headless design sits flush with jig plate surface
• Steel construction hardened to 60 to 65 HRC for wear resistance
• Inside diameter tolerance of +0.0001 to +0.0005 inches for precise tool guidance
• Conforms to ANSI standards for drill bushing dimensions and tolerances
• Non-renewable fixed bushing suitable for permanent fixture installations

Compatibility

Designed as an OEM-style replacement or new-installation drill bushing conforming to ANSI press fit headless bushing standards, suitable for drill jigs and fixture plates requiring a 0.257-inch ID and 0.5-inch OD bushing.

Installation Notes

Installation is performed by machinists or tool and die makers using an arbor press or similar press equipment to drive the bushing into a properly reamed jig plate bore. The receiving hole must be prepared to the correct interference fit tolerance before pressing the bushing into place. Never hammer the bushing directly without a proper driver to avoid distorting the bore. Once pressed in, this bushing is not designed for removal and reinstallation.