Boneham AM00000378 Headless Lm Drill Bushing Liner

Product Description

The BONEHAM AM00000378 is a headless LM-type drill bushing liner designed to guide drill bits with precision in jig and fixture applications. The liner features a 12mm inside diameter, an 18mm body outside diameter, and a 12mm overall length. Constructed from steel and hardened to 60 to 65 HRC, it provides the wear resistance needed for high-repetition drilling operations. Installation is accomplished via press fit, seating the liner securely into a compatible master bushing or jig plate. This component is installed by tool-and-die makers, machinist tradespeople, and maintenance technicians who build or maintain drill jigs and production fixtures.

This liner is suited for use in drill jigs where interchangeable or renewable bushings are required. The headless profile allows it to sit flush within the master bushing body, keeping the working surface unobstructed. It is appropriate for both production-volume and low-volume precision drilling setups in metalworking environments where consistent hole location is critical.

Key Features

• 12mm inside diameter for precise drill bit guidance
• 18mm body outside diameter for compatibility with standard LM master bushings
• 12mm overall liner length
• Steel construction hardened to 60 to 65 HRC for extended wear life
• Press fit installation method for secure, repeatable seating
• Headless design sits flush with jig plate surface

Compatibility

Designed as an OEM-style LM liner for use with standard headless drill bushing systems requiring a 12mm inside diameter and 18mm body outside diameter press fit liner.

Installation Notes

Installation is performed by qualified machinists or tooling technicians using an arbor press or hydraulic press to achieve proper press fit seating. Power down or de-energize any associated machinery before servicing a jig plate or fixture. Do not drive the liner with an impact tool, as this can damage the bore or distort the outer diameter. Verify bore tolerances in the receiving plate or master bushing before pressing in the liner.