Boneham PT284HW Press Fit Headless Drill Bushing Steel

Product Description

The BONEHAM PT284HW is a press fit headless drill bushing designed to guide drill bits and other cutting tools with precision during machining and fabrication operations. This bushing carries Industry Code P and features a 0.281 inch (Letter K) inside diameter with an inside diameter tolerance of +0.0001 to +0.0005 inches, ensuring consistent, accurate tool guidance. The body outside diameter is 0.4375 inches (7/16 inches) and the overall length is 0.25 inches (1/4 inches). Machined from steel, this headless bushing installs by press fit directly into a jig plate or fixture without a retaining head, keeping the top surface flush. It is not renewable and is intended as a permanent installation.

This bushing is suited for use in drill jigs, fixture plates, and tooling setups where a flush, permanent bushing installation is required. Typical applications include metalworking shops, production machining environments, and precision fabrication operations. The headless design is preferred when a flat working surface is needed above the bushing or when vertical clearance above the jig plate is limited. Machinists and toolmakers install this bushing during jig and fixture assembly as part of standard tooling builds.

Key Features

• Press fit installation for permanent, secure seating in jig plates and fixtures
• Headless design provides a flush top surface with no protruding flange
• 0.281 inch ID (Letter K) with tight tolerance of +0.0001 to +0.0005 inches for precise tool guidance
• Steel construction for durability and wear resistance in repetitive drilling operations
• Compact overall length of 0.25 inches suits thin jig plate applications
• Industry Code P designation for straightforward specification and cross-reference

Compatibility

Designed as a standard Industry Code P press fit headless drill bushing for use in drill jigs and machining fixtures requiring a 7/16 inch OD bushing seat and a 0.281 inch tool guide bore.

Installation Notes

Installation is performed by machinists or toolmakers using an arbor press or hydraulic press to seat the bushing flush into a properly reamed jig plate hole. The receiving hole in the fixture plate must be reamed to the correct press fit tolerance for the 7/16 inch OD before installation. Do not hammer the bushing in with impact tools, as this can damage the bore or distort the bushing. Once pressed in, this bushing is not designed for removal or reuse.