Boneham HL6412NC Hl Drill Bushing Liner with Head

Product Description

The BONEHAM HL6412NC is an HL-series drill bushing liner with a head, designed to guide cutting tools with precision in jig and fixture applications. It features a 3/4-inch inside diameter, a 1-inch body outside diameter, and a 3/4-inch liner length. The 1/8-inch head height locates the bushing flush against the jig plate surface, preventing axial movement during operation. Constructed from alloy steel, this liner provides the wear resistance and hardness required for repetitive drilling, reaming, and boring operations. It is installed via press fit into a drill jig, making it a permanent or semi-permanent guide element in machined tooling setups.

The HL6412NC is suited for use in drill jigs and fixtures in manufacturing, metalworking, and toolroom environments. The headed liner design is commonly used where the bushing must be retained against pull-out forces from chip evacuation or tool withdrawal. It seats into a counterbored jig plate hole, with the head resting on the plate face. This configuration supports accurate hole location across repeated production runs in both manual and CNC-assisted fixturing setups.

Key Features

• HL industry-standard liner series with integral head for positive axial retention
• 3/4-inch inside diameter accommodates standard drill and reamer shanks
• 1-inch body outside diameter for press fit installation into jig plate bores
• 3/4-inch liner length provides guided tool engagement depth
• 1/8-inch head height seats flush against jig plate face
• Alloy steel construction delivers hardness and wear resistance for production use

Compatibility

Designed as an OEM-style replacement or direct-fit component for drill jigs and fixtures requiring an HL-series headed liner with a 3/4-inch inside diameter and 1-inch body outside diameter press fit configuration.

Installation Notes

Installation is performed by toolmakers or machinists using a press or arbor press to seat the liner into the jig plate bore. The receiving bore should be machined to the tolerance specified for press fit engagement before installation. Always verify inside diameter clearance with the intended cutting tool before pressing the bushing into the plate. Do not attempt to drive the bushing with impact tools, as this may damage the head or distort the bore.