Boneham L6440NC Headless L Drill Bushing Liner Steel

Product Description

The BONEHAM L6440NC is a headless L-series drill bushing liner designed to provide a precise, hardened guide interface in drill jig applications. It features a 0.75 inch inside diameter, a 1 inch body outside diameter, and a 2.5 inch liner length. Manufactured from alloy steel and hardened to 60-65 HRC, this liner delivers the wear resistance required for repetitive drilling operations in production and toolroom environments. Installation is accomplished via press fit, seating the liner flush and headless into the jig body. Licensed machinists, toolmakers, and fixture builders are the primary installers.

This liner is suited for use in drill jigs and fixture plates where a renewable, headless bushing interface is needed. The L-series designation identifies it as a liner-type bushing intended to accept a slip-renewable or fixed drill bushing. Typical applications include high-volume hole-location work in metalworking, fabrication shops, and aerospace or industrial manufacturing environments where repeatable drill guidance is critical and bushing replacement must be straightforward.

Key Features

• 0.75 inch inside diameter for precise drill or bushing guidance
• 1 inch body outside diameter for standard jig plate fitment
• 2.5 inch liner length for extended wear surface and jig plate depth compatibility
• Alloy steel construction hardened to 60-65 HRC for long service life
• Headless design installs flush with jig plate surface
• Press fit installation method for secure, non-rotating retention

Compatibility

Designed as an OEM-style replacement or new-installation liner bushing for drill jigs and fixture plates requiring a headless L-series press fit liner with a 0.75 inch inside diameter and 1 inch outside diameter.

Installation Notes

Installation is performed by qualified toolmakers or machinists using a bushing press or arbor press to achieve the required press fit interference. The jig plate bore should be machined to the specified tolerance for an L-series liner before pressing. Do not hammer the bushing directly without a proper press arbor, as this can damage the bore or distort the bushing. Follow applicable shop and tooling standards for jig plate preparation and bushing retention.