Boneham H325HN Press Fit Headed Drill Bushing

Product Description

The BONEHAM H325HN is a Type H press fit headed drill bushing designed to guide drill bits with precision in jig and fixture applications. It features a 17/64 inch inside diameter and a 1/2 inch body outside diameter, with a 5/16 inch length under the head. Constructed from steel hardened to 60 to 65 HRC, this bushing delivers the wear resistance and dimensional stability required for repetitive drilling operations. The headed design provides a positive stop against the jig plate surface, maintaining consistent hole depth and alignment across high-volume production runs.

This bushing is used in drill jig setups across metalworking, machining, and fabrication environments. It installs directly into a prepared jig plate hole without the need for locking collars or liners, making it suited for permanent or dedicated fixture builds where the bushing will not be swapped out. The 17/64 inch bore accommodates standard fractional drill bits of that size. Machinists, toolmakers, and fixture builders working to ANSI standards will find this part a direct fit for controlled-location drilling tasks.

Key Features

• Type H press fit installation — no liner or locking collar required
• 17/64 inch inside diameter with a tight tolerance of +0.0001 to +0.0005 inches for accurate bit guidance
• Steel construction hardened to 60 to 65 HRC for extended wear life
• Headed design seats flush against jig plate to control depth and resist thrust forces
• Head outside diameter of 39/64 inch and head height of 7/32 inch for positive seating
• Meets ANSI standards for drill bushing dimensions and tolerances

Compatibility

Designed as an OEM-style replacement or new-install component for standard ANSI-compliant drill jig plates requiring a Type H press fit headed bushing with a 17/64 inch bore.

Installation Notes

Press fit bushings are installed by toolmakers or machinists using an arbor press or similar controlled pressing equipment — never drive with a hammer. The receiving hole in the jig plate must be machined to the correct interference-fit diameter per ANSI jig bushing standards before installation. Once pressed in, the bushing is considered permanent and is not renewable. Ensure the jig plate is securely fixtured during installation to prevent distortion.