Boneham H8812OC Press Fit Headed Drill Bushing

Product Description

The BONEHAM H8812OC is a Type H press fit headed drill bushing designed to guide drill bits and other cutting tools with precision in jig and fixture applications. It features a 29/32 inch inside diameter and a 1-3/8 inch body outside diameter, with an inside diameter tolerance of +0.0002 to +0.0006 inches for consistent, repeatable hole location. The head outside diameter measures 1-39/64 inches and the head height is 3/8 inch. Constructed from steel, this bushing is pressed permanently into a drill jig plate and is not designed to be renewed or replaced in the field. Machinists and toolmakers install this type of bushing during fixture fabrication.

Type H headed drill bushings are used in drill jig fixtures across metalworking, manufacturing, and precision machining environments. The headed design seats against the top face of the jig plate, providing a positive stop at installation depth. With a length under head of 3/4 inch, this bushing suits moderate-thickness jig plates. It is appropriate for production runs where the bushing is installed once and the same tooling operation is repeated consistently at the same location.

Key Features

• Press fit installation method for permanent, non-renewable seating in drill jig plates
• 29/32 inch inside diameter with tight tolerance of +0.0002 to +0.0006 inches for accurate tool guidance
• Steel construction for durability and wear resistance in repetitive drilling applications
• Headed design with 1-39/64 inch head OD and 3/8 inch head height for positive seating against jig plate surface
• 3/4 inch length under head suits standard jig plate thickness ranges
• Single-piece, non-counterbored body for straightforward installation

Compatibility

Designed as an OEM-style press fit headed drill bushing for use in standard drill jig and fixture plates requiring a Type H bushing with a 29/32 inch inside diameter and 1-3/8 inch body outside diameter.

Installation Notes

Press fit bushings are installed by machinists or toolmakers using an arbor press or hydraulic press — never drive with a hammer, as this can damage the bore or misalign the bushing. The receiving hole in the jig plate must be machined to the appropriate press fit tolerance before installation. Once pressed in, this bushing is not intended for removal or reuse. Always verify bore diameter with a calibrated gauge before pressing the bushing into the fixture plate.