Boneham P326HG Press Fit Headless Drill Bushing

Product Description

The BONEHAM P326HG is a press fit headless drill bushing designed to guide cutting tools with precision during drilling, reaming, and boring operations. Manufactured from hardened steel with a hardness rating of 60 to 65 HRC, this bushing resists wear under repeated tool cycling. The 0.25-inch inside diameter accepts a size E drill or equivalent tooling, while the 0.5-inch outside diameter provides a stable press fit into a jig plate or fixture body. The 0.375-inch overall length suits compact fixture designs where head clearance is not available. Machinists and toolmakers install this bushing as a fixed, non-renewable liner in production jigs and fixtures.

This bushing is suited for use in drill jigs, fixture plates, and tooling bodies in both job-shop and production environments. The headless design allows flush seating in applications where a flanged head would interfere with workpiece travel or clamping surfaces. It is appropriate for light to medium drilling cycles where the bushing is intended to remain in the fixture for the life of the jig rather than be replaced between runs. Typical users include machinists, tool and die makers, and fixture builders working to ANSI jig bushing standards.

Key Features

• Press fit installation — no fasteners or locking collars required
• Headless profile allows flush mounting where flanges would obstruct workpieces or clamps
• Steel construction hardened to 60 to 65 HRC for extended wear life under repeated tool contact
• Inside diameter tolerance of plus 0.0001 to plus 0.0004 inches for consistent tool guidance
• Meets ANSI jig bushing standards for dimensional interchangeability
• Non-renewable design — intended as a permanent fixture component

Compatibility

Designed as an ANSI-standard press fit headless drill bushing for use in drill jigs and fixture plates requiring a 0.25-inch inside diameter and 0.5-inch outside diameter liner.

Installation Notes

Press fit installation is performed by a machinist or toolmaker using an arbor press or hydraulic press. The receiving bore in the jig plate must be machined to the appropriate interference fit tolerance before installation. Once pressed in, the bushing is not intended to be removed or reused. Verify bore alignment and surface finish before pressing to avoid damaging the bushing or distorting the ID.