Boneham H888NW Press Fit Headed Drill Bushing Steel

Product Description

The BONEHAM H888NW is a Type H press fit headed drill bushing machined from steel and hardened to 60 to 65 HRC for extended wear resistance. It is designed to guide drill bits, reamers, and other cutting tools with consistent precision during repetitive drilling operations. The bushing presses directly into a jig plate without the need for retaining screws or locking mechanisms, making it suitable for fixed, high-production tooling applications. With a 7/8 inch (0.875 inch) inside diameter and a 1/2 inch length under the head, it provides positive tool guidance in standard drill jig assemblies. Machinists, tool-and-die makers, and fixture builders are the primary installers.

The H888NW is used in industrial and manufacturing environments wherever a permanent, non-renewable drill bushing is required. Typical applications include production drilling jigs, fixture plates, and precision machining setups where the bushing is not expected to be removed and replaced during the service life of the jig. The headed design seats flush against the top face of the jig plate, preventing the bushing from being pushed through under thrust loads. This part is sold individually and is well-suited to both prototype and high-volume production tooling builds.

Key Features

• Type H press fit design installs permanently into jig plate bores without locking hardware
• Hardness of 60 to 65 HRC provides long service life under continuous cutting tool contact
• 7/8 inch ID with a tight tolerance of +0.0002 to +0.0006 inch for accurate tool guidance
• Headed configuration resists axial push-through forces during drilling operations
• Steel construction suited for standard industrial drill jig applications
• Conforms to ANSI standards for drill bushing dimensions and tolerances

Compatibility

Designed as an OEM-style fixed replacement bushing for standard ANSI-compliant drill jig plates and fixture assemblies requiring a Type H headed press fit bushing with a 7/8 inch inside diameter.

Installation Notes

Installation is performed by toolmakers or machinists using a hydraulic or arbor press — never hammer the bushing in freehand, as this can damage the bore or cause misalignment. The receiving hole in the jig plate must be reamed or bored to the correct interference fit dimension before pressing. Because this is a non-renewable bushing, the jig plate bore should be inspected for size and finish prior to installation. Once pressed in, the bushing is not intended for removal without replacing the jig plate bore.