Boneham H5612MK Press Fit Headed Drill Bushing

Product Description

The BONEHAM H5612MK is a Type H press fit headed drill bushing used to guide cutting tools during drilling, reaming, and related machining operations. It features a 41/64 inch inside diameter, a 7/8 inch body outside diameter, and a 3/4 inch length under the head. Manufactured from steel and hardened to 60 to 65 HRC, this bushing delivers consistent bore alignment and resists wear under repeated tool cycling. The headed design seats flush against the jig plate and prevents the bushing from pulling through under axial load. Machinists and tooling engineers install this part in drill jigs and fixture plates to maintain hole location accuracy across production runs.

This bushing is suited for use in machine shop environments, toolroom fabrication, and production jig applications where precise hole guidance is required. The press fit installation method locks the bushing permanently into the jig plate without fasteners, making it appropriate for fixed-station drilling setups. It is not designed as a renewable bushing, so it is intended for long-run fixtures where the bushing location will not require routine replacement. Typical users include machinists, toolmakers, and fixture designers working in metalworking and light manufacturing environments.

Key Features

• Type H press fit headed design seats securely in jig plate bores without additional hardware
• 41/64 inch inside diameter with a close tolerance of +0.0001 to +0.0005 inches for consistent tool guidance
• Hardened steel construction at 60 to 65 HRC resists wear and deformation under repeated drilling cycles
• Non-renewable design suits permanent fixture installations where bushing replacement is not required
• Meets ANSI standards for drill bushing dimensional and tolerance requirements
• 1/4 inch head height and 1-7/64 inch head outside diameter provide a stable, low-profile seating flange

Compatibility

Designed as an OEM-style replacement or original-fit component for ANSI-standard Type H press fit drill jig applications requiring a 41/64 inch bore and 7/8 inch body outside diameter.

Installation Notes

Press fit bushings are installed by machinists or toolmakers using an arbor press or hydraulic press sized for the bushing OD and jig plate bore. 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 for removal or reuse. Always verify bore alignment and bushing seating before operating cutting equipment.