Boneham H488JQ Type H Press Fit Headed Drill Bushing

Product Description

The BONEHAM H488JQ is a Type H press fit headed drill bushing designed to guide drill bits and cutting tools with precision in metalworking, machining, and fabrication jigs. Manufactured from steel with a hardness rating of 60 to 65 HRC, this bushing resists wear under repeated drilling cycles. The 3/8 inch inside diameter and 3/4 inch body outside diameter provide a controlled bore for accurate hole placement. The headed design seats flush against the jig plate, preventing the bushing from being driven through the fixture under downward tool pressure. Machinists and toolmakers install this type of bushing when building or maintaining drill jigs that require repeatable hole location accuracy.

This bushing is suited for use in production and maintenance machining environments where fixed, non-renewable drill bushings are appropriate. The press fit installation method means the bushing is driven directly into the jig plate without a locking mechanism, making it a permanent fixture component. It is commonly specified in drill jig assemblies used across general metalworking, aerospace component fabrication, and mechanical maintenance shops. The ANSI standard compliance ensures dimensional interchangeability with other ANSI-conforming jig components.

Key Features

• Type H headed design prevents bushing pull-through under axial drilling load
• Steel construction with 60 to 65 HRC hardness for extended wear life
• Press fit installation for permanent, fixed placement in jig plates
• 3/8 inch ID with tolerance of +0.0001 to +0.0005 inches for precise tool guidance
• ANSI-compliant dimensions for interchangeability with standard jig components
• Non-renewable design suited for high-volume, fixed-location drilling applications

Compatibility

Designed as an OEM-style replacement and standard-fit component for ANSI-compliant drill jig assemblies requiring a Type H press fit headed bushing with a 3/8 inch inside diameter and 3/4 inch body outside diameter.

Installation Notes

Installation is performed by machinists or toolmakers using an arbor press to drive the bushing into a precision-bored jig plate hole sized to the body outside diameter. Power down all machine tools before handling or installing jig components. Because this is a permanent press fit bushing, the jig plate bore must be machined to the correct interference tolerance before installation — the bushing cannot be removed and reinstalled without risk of damage to the jig plate. Verify bushing seating and head clearance against workpiece geometry before returning the jig to service.