Boneham H484LP Press Fit Headed Drill Bushing Type H

Product Description

The BONEHAM H484LP is a Type H press fit headed drill bushing designed to guide drill bits with precision in jig and fixture applications. It features an inside diameter of 33/64 inches and a body outside diameter of 3/4 inches, with a 1/4-inch length under the head. Manufactured from steel, this bushing is pressed directly into a drill jig plate and does not require a locking mechanism or liner bushing. The head style seats flush against the jig surface to prevent the bushing from pushing through under cutting forces. Machinists, toolmakers, and fixture builders install this component when consistent, repeatable hole location is required across production runs.

This bushing is suited for use in drill jigs, fixture plates, and tooling boards in metalworking and machining environments. It is a non-renewable, permanent-installation bushing, meaning it is pressed into the jig plate and is not intended for routine field replacement. Typical applications include production drilling, reaming, and boring operations where accurate hole placement must be maintained over repeated cycles. The head outside diameter measures 59/64 inches and the head height is 7/32 inches, providing a positive seating shoulder against the jig face.

Key Features

• Press fit installation — no liner bushing or locking ring required
• Type H industry standard bushing code for easy cross-reference
• Steel construction for durability in production drilling environments
• Inside diameter tolerance of plus 0.0001 to plus 0.0005 inches for precise drill guidance
• Headed design provides a positive seating shoulder against the jig surface
• Non-renewable fixed bushing suitable for permanent fixture installations

Compatibility

Designed as an OEM-style replacement or direct fit for standard drill jig plates and tooling fixtures that accept a Type H press fit headed bushing with a 3/4-inch body outside diameter.

Installation Notes

Installation is performed by toolmakers or machinists using a press — do not hammer the bushing directly, as impact installation can damage the bore or distort the jig plate. Ensure the receiving hole in the jig plate is machined to the appropriate press fit tolerance before installation. De-energize or lock out any associated machinery before inserting or removing jig tooling. Once pressed in, this bushing is considered permanent and is not rated for repeated removal and reinstallation.