Boneham H8812OP Press Fit Headed Drill Bushing

Product Description

The BONEHAM H8812OP is a Type H press fit headed drill bushing designed to guide cutting tools accurately during drilling, reaming, and boring operations. Machined from steel, this bushing features a 63/64 inch inside diameter and a 1-3/8 inch body outside diameter, with a head outside diameter of 1-39/64 inches and a head height of 3/8 inch. The 3/4 inch length under the head provides solid support within the jig plate. It is permanently pressed into the drill jig and is not intended to be removed or replaced during service. Machinists and tooling engineers rely on headed bushings like the H8812OP to maintain positional accuracy and extend hole quality across production runs.

This bushing is suited for use in drill jigs and fixture plates in precision machining environments, including production shops, tool rooms, and manufacturing facilities. The headed design seats flush against the jig plate surface, preventing the bushing from being pushed through under axial cutting loads. It is appropriate for ferrous and non-ferrous workpiece materials where close-tolerance hole guidance is required. Installation is permanent, making it the correct choice for fixed-location applications where bushing changeout is not needed.

Key Features

• Press fit installation for permanent, non-renewable service in drill jig plates
• 63/64 inch inside diameter with a tolerance of +0.0002 to +0.0006 inches for precise tool guidance
• 1-3/8 inch body outside diameter and 1-39/64 inch head outside diameter
• 3/4 inch length under head provides stable engagement within the jig plate thickness
• Steel construction for durability under repeated drilling cycles
• Head design resists axial push-through under cutting loads

Compatibility

Designed as an OEM-style replacement or original-fit component for drill jigs and fixture plates requiring a Type H press fit headed bushing with a 63/64 inch inside diameter and 1-3/8 inch body outside diameter.

Installation Notes

Installation of press fit drill bushings is typically performed by a machinist or tooling specialist using an arbor press or hydraulic press sized appropriately for the bushing and jig plate material. The jig plate bore should be finish-reamed to the bushing's press fit tolerance before installation. Once pressed in, this bushing is not designed for removal and should be treated as a permanent fixture component. Verify bore alignment and surface condition before pressing to avoid galling or misalignment.