Boneham H484JJ Press Fit Headed Drill Bushing Steel

Product Description

The BONEHAM H484JJ is a Type H press fit headed drill bushing manufactured from steel. It is designed to guide drill bits and other cutting tools with precision during machining and fabrication operations. The bushing features a 23/64-inch inside diameter, a 3/4-inch body outside diameter, and a 1/4-inch length under the head. The head outside diameter measures 59/64 inches and the head height is 7/32 inches. This bushing is pressed directly into a jig plate and is not designed for renewal or removal after installation. It is used by machinists, tool-and-die makers, and fabrication shops that require consistent hole location accuracy across repeated drilling operations.

This bushing is suited for use in drill jigs and fixture plates in machine shops, production environments, and fabrication facilities. The headed design provides a positive stop against the jig plate surface, ensuring consistent depth registration. The press fit installation method locks the bushing permanently in place, making it appropriate for high-volume drilling operations where bushing replacement is not required. The inside diameter tolerance of +0.0001 to +0.0005 inches supports accurate tool guidance with standard drill bits and reamers.

Key Features

• Type H press fit design for permanent, non-renewable installation in jig plates
• Inside diameter of 23/64 inches with a close tolerance of +0.0001 to +0.0005 inches for precise tool guidance
• Steel construction provides hardness and wear resistance for repeated drilling cycles
• Headed design provides positive stop and flush seating against the jig plate surface
• Head outside diameter of 59/64 inches and head height of 7/32 inches for standard jig plate counterbore fitment
• Not counterbored — straightforward press fit installation requiring no additional bushing hardware

Compatibility

Designed as an OEM-style permanent drill bushing for use in standard drill jig plates and fixture assemblies requiring a headed, press fit bushing with a 23/64-inch inside diameter and 3/4-inch body outside diameter.

Installation Notes

Installation is performed by machinists or toolmakers using an arbor press or hydraulic press to seat the bushing flush into the prepared jig plate bore. Ensure the receiving hole is machined to the correct interference fit tolerance before pressing the bushing in. Once pressed, this bushing is not designed for removal or replacement. Power down all associated machinery before working on any jig or fixture assembly.