Boneham H266HD Press Fit Headed Drill Bushing Type H

Product Description

The BONEHAM H266HD is a press fit headed drill bushing designed to guide drill bits with precision in jig and fixture applications. Built to Type H specifications, this bushing features an inside diameter of 0.246 inches (Letter size D) with a tight tolerance of +0.0001 to +0.0004 inches, ensuring repeatable hole location accuracy. The body outside diameter measures 13/32 inches with a head outside diameter of 1/2 inch and a head height of 5/32 inches. Constructed from steel hardened to 60-65 HRC, the H266HD delivers wear resistance suited to production drilling environments. Machinists, toolmakers, and fixture builders typically install this component.

This bushing is used in drill jigs and machining fixtures across manufacturing, tooling shops, and production environments. The headed design seats flush against the jig plate surface, resisting axial push-through during drilling operations. The 3/8-inch length under the head accommodates standard jig plate thicknesses common in light to medium production tooling. It is a permanent, non-renewable installation pressed directly into the jig body without a liner bushing.

Key Features

• Type H press fit headed design for permanent installation in drill jigs
• Inside diameter 0.246 inches (Letter D) with tolerance +0.0001 to +0.0004 inches for precise drill guidance
• Steel construction hardened to 60-65 HRC for extended wear life in production drilling
• Head outside diameter 1/2 inch and head height 5/32 inches provide positive seating against jig plate
• Non-renewable, non-counterbored configuration suits permanent fixture installations
• Meets ANSI standards for drill bushing geometry and tolerances

Compatibility

Designed as an OEM-style replacement or new-build component for drill jigs and machining fixtures requiring a Type H press fit headed bushing with a 0.246-inch inside diameter and 13/32-inch body outside diameter per ANSI standards.

Installation Notes

Installation is performed by toolmakers or machinists using an arbor press or hydraulic press to seat the bushing into a precision-bored hole in the jig plate. The bore in the jig plate must be machined to the correct interference fit tolerance before pressing to avoid bushing distortion or bore damage. Do not hammer the bushing directly without a proper driver to avoid deforming the head or altering the inside diameter. Verify inside diameter with a calibrated plug gauge after installation to confirm tolerance integrity.