Boneham H488LA Press Fit Headed Drill Bushing

Product Description

The BONEHAM H488LA is a Type H press fit headed drill bushing machined from steel and heat-treated to a hardness of 60 to 65 HRC. It guides drill bits and other cutting tools with precision, maintaining accurate hole location across repeated operations. The inside diameter is 15/32 inches with a tolerance of +0.0001 to +0.0005 inches, making it suitable for applications that demand tight positional accuracy. The head design seats flush against the jig plate surface and resists axial pull-through under drilling loads. Machinists, toolmakers, and jig-and-fixture builders install this type of bushing in production and maintenance environments.

The H488LA is suited for use in drill jigs where a permanent, non-renewable bushing is required. With a body outside diameter of 3/4 inches and a length under head of 1/2 inches, it fits standard jig plate bores designed to ANSI specifications. The 59/64-inch head outside diameter and 7/32-inch head height provide positive axial retention without additional fasteners. Typical applications include metalworking shops, aerospace fabrication, and general manufacturing where repeatable hole location is critical.

Key Features

• Press fit installation - no adhesive or locking hardware required for secure seating
• 15/32-inch inside diameter with +0.0001 to +0.0005-inch tolerance for precise tool guidance
• Steel construction heat-treated to 60 to 65 HRC for wear resistance and long service life
• Headed (Type H) design prevents axial displacement under drilling loads
• Non-renewable design for permanent jig installations
• Manufactured to ANSI standards for dimensional compatibility

Compatibility

Designed as a permanent press fit replacement or new-install bushing for ANSI-standard drill jig plates requiring a Type H headed bushing with a 15/32-inch inside diameter and 3/4-inch body outside diameter.

Installation Notes

Installation is performed by toolmakers or machinists using an arbor press or hydraulic press - never drive with a hammer, as this can damage the bore or the jig plate. The receiving bore in the jig plate must be machined to the appropriate interference fit tolerance before pressing. Once installed, this bushing is not intended for removal or replacement. Verify bore alignment and bushing seating depth before placing the jig into service.