Boneham L8812OR Headless L Drill Bushing Liner 1in Id

Product Description

The BONEHAM L8812OR is a headless L-type drill bushing liner designed to guide drill bits with precision in jig and fixture applications. It features a 1-inch inside diameter and a 1-3/8-inch body outside diameter, with a 3/4-inch liner length. Constructed from alloy steel hardened to 60-65 HRC, this liner provides the wear resistance needed for repeated drilling cycles without dimensional shift. Installation is press fit, seating the liner securely into a prepared jig plate without the use of a locking head. Machinists, toolmakers, and fixture builders working in production or prototype environments are the typical installers.

This liner is suited for use in drill jigs where a renewable, headless bushing is required to maintain tight positional tolerances on drilled holes. The L liner industry code designates its dimensional series, making it interchangeable within tooling systems that specify L-series press-fit liners. It is appropriate for light to medium production drilling in both shop and manufacturing floor settings where jig plates are machined to accept standard press-fit bushings.

Key Features

• 1-inch inside diameter for standard drill bit guidance
• 1-3/8-inch body outside diameter for press-fit seating in jig plates
• 3/4-inch liner length provides stable drill entry support
• Alloy steel construction hardened to 60-65 HRC for extended wear life
• Headless L-type design allows flush installation with the jig plate surface
• Press fit installation — no locking screw or retaining head required

Compatibility

Designed as an OEM-style replacement or new-installation liner for tooling systems specifying L-series headless press-fit drill bushing liners per standard industry dimensional codes.

Installation Notes

Installation is performed by toolmakers or machinist-level tradespeople using a drill press, arbor press, or hydraulic press to seat the liner into a close-tolerance bored hole in the jig plate. Ensure the receiving bore is machined to the correct press-fit tolerance before installation — do not drive the liner in with impact tools, as this can distort the inside diameter. Once pressed in, verify the liner is flush and square to the plate surface before use.