Boneham H4816JJ Press Fit Headed Drill Bushing Steel

Product Description

The BONEHAM H4816JJ is a Type H press fit headed drill bushing used to guide drill bits and cutting tools with precision during machining and fabrication operations. It features a 23/64 inch inside diameter, a 3/4 inch body outside diameter, and a 1 inch length under the head. Manufactured from steel hardened to 60 to 65 HRC, the H4816JJ provides a wear-resistant bore surface that maintains hole location accuracy across repeated drilling cycles. The headed design seats flush against the jig plate, preventing axial movement without the need for additional retaining hardware. Machinists, tool and die makers, and precision fabricators install this bushing in drill jigs and fixtures.

This bushing is suited for use in drill jigs, fixture plates, and tooling assemblies found in both production and job-shop environments. The press fit installation method locks the bushing permanently in place within the jig body, making it appropriate for applications where the bushing is not expected to be removed or replaced during the life of the fixture. It is not renewable. Typical applications include high-volume hole drilling operations where consistent hole location and perpendicularity are required across multiple workpieces.

Key Features

• Type H headed design prevents axial pullout during drilling without supplemental fasteners
• 23/64 inch inside diameter with a tight tolerance of +0.0001 to +0.0005 inches for precise drill guidance
• Steel construction hardened to 60 to 65 HRC for long service life in abrasive drilling environments
• Press fit installation method for permanent, fixed-location jig applications
• Head outside diameter of 59/64 inch and head height of 7/32 inch for positive seating on jig plate surface
• Meets ANSI standards for drill bushing dimensions and tolerances

Compatibility

Designed as an OEM-style replacement or original-installation pressed drill bushing for drill jigs and fixture plates requiring a Type H headed, non-renewable press fit bushing with a 23/64 inch bore.

Installation Notes

Installation is performed by machinists or toolmakers using a press or arbor press to seat the bushing into a properly reamed jig plate hole. The receiving hole in the jig plate must be machined to the correct press fit tolerance to ensure secure retention. Do not hammer the bushing in freehand, as this risks misalignment or damage to the bore. Once pressed in, the H4816JJ is not designed to be removed or reused.