Boneham P485JQ Headless Drill Bushing 3/8 in Id Steel

Product Description

The BONEHAM P485JQ is a press fit headless drill bushing designed to guide drill bits and cutting tools with precision in jig and fixture applications. Manufactured from steel hardened to 60 to 65 HRC, this Type P bushing features a 0.375 inch inside diameter and a 0.750 inch body outside diameter with a 0.3125 inch overall length. The headless design sits flush with the jig plate surface, making it well suited for applications where a protruding head would interfere with workpiece clearance or clamping. Inside diameter tolerance is held to +0.0001 to +0.0005 inches for consistent tool guidance and repeatable hole location.

This bushing is used in metal fabrication, machine shop, and production drilling operations where accurate hole placement is required. It installs directly into a prepared hole in a drill jig plate without a separate liner bushing, making it a fixed, non-renewable component. Typical applications include production runs on steel, aluminum, and similar materials where jig bushing location is permanent for the life of the tooling plate.

Key Features

• Press fit installation for secure, permanent seating in jig plate bores
• Headless design allows flush mounting with the jig plate surface
• Inside diameter tolerance of +0.0001 to +0.0005 inches for precise tool guidance
• Steel construction hardened to 60 to 65 HRC for wear resistance
• Meets ANSI standards for drill bushing geometry and dimensional consistency
• Type P industry code for straightforward cross-referencing and replacement

Compatibility

Designed as an OEM-style fixed drill bushing for use in drill jig plates requiring a 0.750 inch body outside diameter press fit bore and a 0.375 inch nominal inside diameter for standard drill or reamer guidance.

Installation Notes

Installation is performed by machinists or toolmakers using an arbor press or hydraulic press to seat the bushing into a precision-bored jig plate hole. The receiving bore in the jig plate must be machined to the appropriate press fit tolerance to achieve proper interference before pressing the bushing into position. Once installed, this is a non-renewable bushing and is not intended for removal and reuse. Verify inside diameter clearance with the intended cutting tool before finalizing jig plate design.