Boneham H408IW Press Fit Headed Drill Bushing Steel

Product Description

The BONEHAM H408IW is a Type H press fit headed drill bushing used to guide cutting tools with precision in jig and fixture applications. It features an inside diameter of 0.332 inches (Letter Q) with a tight tolerance of +0.0001 to +0.0005 inches, a body outside diameter of 5/8 inches, and a length under head of 1/2 inches. Constructed from steel for wear resistance and dimensional stability, this bushing is a permanent, non-renewable component that is pressed directly into the jig plate. Machinists, toolmakers, and fixture builders install this type of bushing in production drilling setups where repeatable hole location accuracy is required.

The H408IW is suited for use in drill jigs where a headed bushing is needed to seat flush against the jig plate surface or rest on top of it, preventing the bushing from being pushed through during drilling operations. The head outside diameter measures 51/64 inches and the head height is 7/32 inches. This bushing is appropriate for light to medium production work in metalworking, fabrication, and machine shop environments where fixed, press-in tooling guides are standard practice.

Key Features

• Type H press fit design installs permanently into the jig plate without additional locking hardware
• Inside diameter of 0.332 inches (Letter Q) with tolerance of +0.0001 to +0.0005 inches for precise tool guidance
• Body outside diameter of 5/8 inches with a head outside diameter of 51/64 inches
• Head height of 7/32 inches provides positive seating and prevents push-through
• Steel construction for hardness and long service life in repetitive drilling operations
• Non-renewable fixed bushing — intended as a permanent installation

Compatibility

Designed as an OEM-style replacement or direct fitment for Type H press fit headed drill bushing applications in standard drill jig plates sized to accept a 5/8 inch body outside diameter.

Installation Notes

This bushing is installed by a toolmaker or machinist using an arbor press or hydraulic press to drive the bushing into a pre-reamed hole in the jig plate. The receiving hole should be reamed to the appropriate interference fit tolerance for a secure press fit. Do not hammer the bushing in unevenly, as this can distort the inside diameter and compromise tool guidance accuracy. Once pressed in, this bushing is not designed for removal or replacement.