Boneham HL3212IM Hl Drill Bushing Liner with Head

Product Description

The BONEHAM HL3212IM is an HL-series headed drill bushing liner designed to guide drill bits with precision in jig and fixture applications. With a 5/16 inch inside diameter and a 1/2 inch body outside diameter, this liner accepts standard drill bushings and seats flush within a drill jig plate. The flanged head, measuring 5/8 inch in outside diameter and 3/32 inch in height, prevents the liner from being pushed through the jig plate during drilling operations. Constructed from alloy steel, the HL3212IM is installed via press fit and is intended for use by machinists, toolmakers, and precision-drilling trade professionals working with drill jigs and fixtures.

This liner is suited for production and maintenance drilling operations where repeatable hole location is required. The headed liner style allows for positive axial positioning within the jig plate, making it appropriate for applications where the bushing must be retained against upward thrust. The 3/4 inch liner length provides sufficient depth for stable bit guidance across standard jig plate thicknesses. This part ships as a single unit and is a direct component for jig and fixture builds or repairs in machining and fabrication environments.

Key Features

• 5/16 inch inside diameter for accurate drill bit guidance
• 1/2 inch body outside diameter with press fit installation into jig plate
• Flanged head at 5/8 inch outside diameter prevents axial push-through
• 3/4 inch liner length for stable engagement through standard jig plate stock
• Alloy steel construction for wear resistance under repeated drilling cycles
• HL industry code designation ensures interchangeability with standard HL drill bushing liner specifications

Compatibility

Designed as an OEM-style replacement or new-build component for drill jigs and fixtures requiring an HL-series headed liner with a 5/16 inch inside diameter and press fit installation.

Installation Notes

Installation is performed by press fitting the liner into a prepared hole in the jig plate using a hydraulic or arbor press. Ensure the receiving bore is machined to the appropriate tolerance for an interference fit before pressing. Do not drive the liner with impact tools, as this may damage the head or distort the bore. Follow applicable shop standards and jig design specifications when selecting plate thickness and liner retention method.