Boneham P5612MK Headless Drill Bushing 41/64 in Id Steel

Product Description

The BONEHAM P5612MK is a press fit headless drill bushing used to guide cutting tools with precision in jig and fixture applications. Machined from steel and hardened to 60 to 65 HRC, this bushing resists wear under repeated drilling cycles. It carries an inside diameter of 41/64 inches with a tight tolerance of plus 0.0001 to plus 0.0005 inches, a body outside diameter of 7/8 inches, and an overall length of 3/4 inches. The headless design allows flush or sub-flush seating where a flanged head would interfere with the workpiece or mating fixture components. Machinists, toolmakers, and fixture builders install this type of bushing in production and maintenance environments.

This bushing is suited for use in drill jigs where a permanent, non-renewable guide is acceptable. The press fit installation method means the bushing is driven or pressed into a prepared hole in the jig body and is intended to remain fixed for the service life of the fixture. Industry code P identifies the bushing family per ANSI standards, making it straightforward to cross-reference against standard jig bushing charts. Typical applications include repetitive hole-location work in metal fabrication, aerospace tooling, and general manufacturing fixtures requiring consistent drill entry points.

Key Features

• Headless design allows flush seating in close-clearance fixture layouts
• Steel construction hardened to 60 to 65 HRC for extended wear life
• Inside diameter tolerance of plus 0.0001 to plus 0.0005 inches for precise tool guidance
• Press fit installation — no locking hardware required
• Meets ANSI standards for drill bushing geometry and dimensional compliance
• Non-renewable fixed bushing suitable for high-volume, single-location jig setups

Compatibility

Designed as an ANSI-standard industry code P press fit headless drill bushing, compatible with jig plates and fixture bodies bored to accept a 7/8-inch outside diameter press fit bushing per standard jig bushing tolerancing practices.

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. The receiving bore must be machined to the correct interference fit per ANSI jig bushing standards before installation. Once pressed in, this bushing is not designed for removal and reuse. Verify bore alignment and cleanliness before pressing to avoid damage to the bushing or host fixture.