Boneham L3212IM Headless L Drill Bushing Liner Alloy Steel

Product Description

The BONEHAM L3212IM is a headless L-series drill bushing liner designed to guide and locate drill bushings in jig plates and tooling fixtures. It features a 5/16 inch inside diameter, a 1/2 inch body outside diameter, and a 3/4 inch liner length. Manufactured from alloy steel with a hardness rating of 60 to 65 HRC, this liner provides the wear resistance and dimensional stability required for accurate, repeatable hole-location in production drilling operations. Installation is accomplished via press fit, seating the liner firmly into the jig plate bore without the need for fasteners or additional hardware. It is intended for use by machinists and toolmakers in precision fixturing applications.

This liner is suited for use in drill jigs and modular fixturing systems where a renewable headless liner is required. The L-series designation indicates a standard liner configuration that accepts slip-renewable and fixed drill bushings. It is appropriate for light to medium-duty production drilling in both job-shop and manufacturing environments where consistent hole location across repeated setups is critical. The press fit installation method makes it compatible with standard jig plate bores prepared to appropriate tolerance specifications.

Key Features

• 5/16 inch inside diameter for precise bushing and drill guidance
• 1/2 inch body outside diameter for standard jig plate bore fitment
• 3/4 inch liner length provides stable seating depth in the jig plate
• Alloy steel construction with 60 to 65 HRC hardness for extended wear life
• Press fit installation eliminates need for additional fasteners
• Headless L-series design accepts slip-renewable and fixed drill bushings

Compatibility

Designed as an OEM-style replacement or new-installation liner for drill jigs and tooling fixtures that use standard L-series headless press fit drill bushing liners.

Installation Notes

Installation is performed by toolmakers or machinists using a press or arbor press to seat the liner into a prepared jig plate bore. The bore should be machined to the appropriate interference fit tolerance before pressing the liner into place. Do not hammer the liner in directly without a proper driver to avoid damage to the bore or liner. Verify liner seating depth and alignment before placing the jig into service.