Boneham HL325IM Hl Drill Bushing Liner with Head

Product Description

The BONEHAM HL325IM is an HL-series drill bushing liner with head, designed to provide a precise, hardened guide for drill bits during jig-based machining operations. The liner features a 5/16-inch inside diameter and a 1/2-inch body outside diameter, with a 5/8-inch head outside diameter that seats flush against the jig plate surface. The liner length is 5/16 inches and the head height is 3/32 inches. Constructed from alloy steel, the HL325IM is installed via press fit into a slip bushing or directly into a fixture, giving machinists a stable, repeatable drill path on production runs.

This drill bushing liner is used in metalworking and machining environments where jig bushings guide cutting tools with tight positional tolerances. Typical applications include production drilling fixtures in manufacturing shops, tool rooms, and fabrication operations requiring consistent hole location across multiple workpieces. The HL designation indicates a headed liner type, which is seated in a jig plate and accepts a renewable slip bushing for tool changes without disturbing fixture setup.

Key Features

• 5/16-inch inside diameter for precise drill bit guidance
• 1/2-inch body outside diameter for press fit installation into jig plate or slip bushing
• 5/8-inch head outside diameter provides positive seating against jig plate surface
• 3/32-inch head height keeps fixture profile low
• Alloy steel construction for wear resistance under repeated drilling cycles
• Press fit installation method for secure, non-rotating retention in fixture

Compatibility

Designed as an OEM-style replacement or new-installation HL-series drill bushing liner for standard jig bushing fixtures accepting a 1/2-inch body outside diameter press fit component.

Installation Notes

Installation of press fit drill bushing liners is performed by toolmakers or machinists using an arbor press or hydraulic press to seat the liner flush into the jig plate bore. Ensure the receiving bore is machined to the correct interference fit tolerance before pressing to avoid cracking or distortion. Do not hammer the bushing directly without a proper driver to avoid damaging the head or bore alignment.