Boneham H326HN Press Fit Headed Drill Bushing Type H

Product Description

The BONEHAM H326HN is a Type H press fit headed drill bushing used to guide drill bits and other cutting tools with precision during machining and fabrication operations. It features a 17/64 inch inside diameter and a 1/2 inch body outside diameter, with a 3/8 inch length under the head. The head outside diameter measures 39/64 inch and the head height is 7/32 inch. Constructed from steel and hardened to 60 to 65 HRC, the H326HN delivers consistent bore alignment and wear resistance across repeated drilling cycles. It is installed by press fit into a jig plate or fixture body with no additional hardware required.

This bushing is intended for use in drill jigs and fixture plates across general metalworking, toolroom, and production machining environments. It suits applications where a permanent, non-renewable bushing is acceptable and precise hole location must be maintained across multiple workpieces. Machinists, toolmakers, and fixture builders install this type of component in both job shop and production floor settings. The headed design provides a positive stop against the jig plate surface, helping to maintain consistent depth and alignment.

Key Features

• Press fit installation — no locking collar or retaining hardware needed
• Type H headed design provides positive stop against the jig plate surface
• 17/64 inch inside diameter with tolerance of +0.0001 to +0.0005 inch for precise tool guidance
• Steel construction hardened to 60 to 65 HRC for extended wear life
• Non-renewable (fixed) bushing — suited for permanent fixture installations
• Meets ANSI standards for drill bushing dimensions and tolerances

Compatibility

Designed as a permanent press fit replacement or new-installation drill bushing for ANSI-standard Type H headed bushing applications in drill jigs and machining fixtures.

Installation Notes

Installation is performed by toolmakers or machinists using an arbor press to seat the bushing flush into a properly sized jig plate bore. The receiving hole in the fixture must be machined to the appropriate press fit tolerance before installation. Once pressed in, this bushing is not intended for removal or replacement. Always verify bore alignment and bushing seating before production drilling begins.