Boneham H488JB Press Fit Headed Drill Bushing Type H

Product Description

The BONEHAM H488JB is a Type H press fit headed drill bushing machined from steel and hardened to 60 to 65 HRC. It is designed to guide cutting tools accurately during drilling, reaming, and related machining operations. The bushing presses directly into a jig plate without the need for a locking mechanism, making it a permanent installation. Inside diameter is 11/32 inches with a close tolerance of plus 0.0001 to plus 0.0005 inches, and the body outside diameter is 3/4 inches. This level of precision is critical for maintaining hole location accuracy across production runs.

Type H press fit headed drill bushings are used in drill jigs and fixtures across general manufacturing, tool and die, and production machining environments. The headed design seats flush against the jig plate surface, providing a positive stop that controls the bushing's axial position. This part is suited for applications where the bushing is not intended to be removed or replaced during normal service. Machinists, toolmakers, and fixture builders are the primary installers.

Key Features

• Press fit installation for permanent, fixed positioning in drill jig plates
• Steel construction hardened to 60 to 65 HRC for wear resistance under repeated tool contact
• Inside diameter tolerance of plus 0.0001 to plus 0.0005 inches for precise tool guidance
• Headed design provides a positive axial stop against the jig plate face
• Meets ANSI standards for drill bushing dimensions and performance
• Non-renewable design intended for permanent fixture installations

Compatibility

Designed as an OEM-style replacement or new-installation component for steel drill jig plates and machining fixtures requiring a permanent Type H press fit headed bushing with an 11/32 inch bore.

Installation Notes

Press fit bushings are installed by toolmakers or machinists using an arbor press or hydraulic press to drive the bushing into a correctly sized and toleranced hole in the jig plate. The receiving hole must be prepared to the correct interference fit diameter before installation to avoid bushing distortion or bore closure. Once pressed in, the bushing is not designed for removal. Verify bore dimensions after installation before placing the jig into production service.