Boneham H8812NU Press Fit Headed Drill Bushing

Product Description

The BONEHAM H8812NU is a Type H press fit headed drill bushing designed to guide drill bits and other cutting tools with precision in jig and fixture applications. The bushing features a 55/64-inch inside diameter and a 1-3/8-inch body outside diameter, with a 3/4-inch length under the head and a 3/8-inch head height. Constructed from steel hardened to 60 to 65 HRC, it delivers the wear resistance required for repeated tool cycling. The inside diameter is held to a tight tolerance of +0.0002 to +0.0006 inches, ensuring accurate hole location in production drilling operations.

This bushing is suited for use in drill jigs, fixtures, and tooling plates across metalworking and precision machining environments. It installs without a retaining liner bushing, making it appropriate for fixed, permanent tooling setups. Machinists and toolmakers in job shops, production facilities, and maintenance operations specify this type of bushing when a headed, non-renewable press fit solution is required. It is not counterbored and does not accommodate a renewable liner.

Key Features

• Type H headed press fit design — installs permanently into jig plate without liner bushing
• 55/64-inch inside diameter with +0.0002 to +0.0006-inch tolerance for precise tool guidance
• 1-3/8-inch body outside diameter and 3/4-inch length under head
• Head outside diameter of 1-39/64 inches with 3/8-inch head height
• Steel construction hardened to 60 to 65 HRC for extended wear life
• Meets ANSI standards for drill bushing geometry and dimensional requirements

Compatibility

Designed as an OEM-style fixed drill bushing for use in standard jig plates and tooling fixtures requiring a press fit, headed, non-renewable bushing per ANSI specifications.

Installation Notes

Installation is performed by toolmakers or machinists using an arbor press or hydraulic press to seat the bushing flush into a prepared jig plate bore. The receiving hole in the jig plate must be machined to the appropriate interference fit tolerance to achieve proper retention. Do not strike the bushing directly with a hammer, as this can damage the head or alter bore geometry. Verify bore alignment before pressing to avoid cocking the bushing in the plate.