Boneham H4028KI Press Fit Headed Drill Bushing

Product Description

The BONEHAM H4028KI is a Type H press fit headed drill bushing designed to guide cutting tools with precision during drilling, reaming, and boring operations. Manufactured from steel and hardened to 60 to 65 HRC, this bushing resists wear under repeated tool contact. It features an inside diameter of 0.413 inches (Letter size Z) with a tight tolerance of +0.0001 to +0.0005 inches, a body outside diameter of 5/8 inch, and a length under head of 1-3/4 inches. The head outside diameter measures 51/64 inch with a head height of 7/32 inch. It installs via press fit and is intended for use without a liner bushing. Machinists and toolmakers install this component in jig plates and fixture tooling across production and job-shop environments.

This bushing suits applications where a permanent, non-renewable guide is required in a drill jig or fixture. The headed style locates against the jig plate face, providing a positive stop during press installation. It is appropriate for use in metalworking environments requiring ANSI-compliant tooling bushings, whether in low-volume custom fixturing or high-cycle production jigs where tool guidance accuracy is critical to part quality.

Key Features

• Press fit installation for permanent, fixed positioning in jig plate bores
• Inside diameter of 0.413 inches (Letter Z) with tolerance of +0.0001 to +0.0005 inches for precise tool guidance
• Steel construction hardened to 60 to 65 HRC for extended wear resistance
• Head outside diameter of 51/64 inch with 7/32 inch head height for positive plate registration
• ANSI-compliant Type H headed bushing configuration
• Non-renewable design — suited for permanent fixture installations

Compatibility

Designed as an ANSI-standard Type H press fit headed drill bushing for use in drill jigs and machining fixtures requiring a permanent, non-renewable guide bushing installation.

Installation Notes

Installation is performed by a machinist or toolmaker using an arbor press or hydraulic press to seat the bushing flush into the jig plate bore. The receiving bore should be finish-reamed to the specified interference fit tolerance before pressing to avoid damaging the bushing or distorting the inside diameter. Never drive the bushing with impact tools, as this can crack the hardened body or shift the bore alignment. Confirm inside diameter gauge after installation to verify dimensional integrity has been maintained.