Boneham H328HN Press Fit Headed Drill Bushing

Product Description

The BONEHAM H328HN is a Type H press fit headed drill bushing designed to guide cutting tools with precision in jig and fixture drilling applications. Machined from steel and hardened to 60 to 65 HRC, this bushing provides a wear-resistant bore surface that maintains positional accuracy over repeated drilling cycles. The inside diameter measures 17/64 inches with a tight tolerance of plus 0.0001 to plus 0.0005 inches, ensuring consistent tool guidance. The head design keeps the bushing flush and seated against the jig plate surface. This part is installed by machinists, tool-and-die makers, and production drilling personnel.

This bushing is suited for use in drill jigs and fixtures in manufacturing, fabrication, and toolroom environments. The press fit installation method makes it appropriate for permanent or long-service applications where the bushing is not intended to be routinely swapped out. It fits standard jig plate bores sized to accept a 1/2-inch OD body. The 1/2-inch length under head accommodates standard jig plate thicknesses commonly encountered in production drilling setups.

Key Features

• Press fit installation for permanent, stable seating in jig plates
• Inside diameter of 17/64 inches with tolerance of plus 0.0001 to plus 0.0005 inches for precise tool guidance
• Hardened steel construction at 60 to 65 HRC for extended wear life
• Head outside diameter of 39/64 inches with a 7/32-inch head height for positive seating
• Meets ANSI standards for drill bushing geometry and dimensional consistency
• Non-renewable design for permanent fixture installations

Compatibility

Designed as an OEM-style replacement or new-installation drill bushing for standard drill jigs and fixtures requiring a Type H press fit headed bushing with a 17/64-inch ID and 1/2-inch body OD per ANSI specifications.

Installation Notes

Press fit bushings are installed by a qualified machinist using an arbor press or bushing driver — never a hammer directly on the bushing face. Verify the jig plate bore diameter and finish meet ANSI tolerances before pressing to avoid bushing distortion. Once pressed in, this bushing is not designed for removal and reinstallation. Follow shop safety procedures and secure the workpiece before pressing.