Boneham H4828JJ Press Fit Headed Drill Bushing Type H

Product Description

The BONEHAM H4828JJ is a Type H press fit headed drill bushing manufactured from steel with a hardness rating of 60 to 65 HRC. It features a 23/64 inch inside diameter, a 3/4 inch body outside diameter, and a length under head of 1-3/4 inches. The head outside diameter measures 59/64 inches and the head height is 7/32 inches. This bushing is pressed directly into a drill jig plate to guide cutting tools with precision, maintaining consistent hole location across repeated operations. Machinists and toolmakers install this component during jig and fixture assembly in production and maintenance machine shop environments.

The H4828JJ is suited for use in drill jigs where a permanent, non-renewable bushing is required. The press fit installation method secures the bushing without additional locking hardware. It is appropriate for production runs requiring repeatable hole location accuracy in metalworking, fabrication, and industrial maintenance applications. The ANSI-compliant Type H designation makes it a standard selection when specifying headed press fit bushings for jig plate thicknesses that match the 1-3/4 inch length under head dimension.

Key Features

• Type H headed press fit design — no locking collar or additional hardware required
• Steel construction with 60 to 65 HRC hardness for wear resistance under repeated drill pass cycles
• Inside diameter tolerance of +0.0001 to +0.0005 inches for precise tool guidance
• ANSI-compliant bushing industry code H designation
• Non-renewable configuration — intended for permanent installation in the jig plate
• Head provides positive stop against jig plate surface, controlling depth seating during press installation

Compatibility

Designed as a permanent OEM-style press fit drill bushing for use in drill jigs and fixtures requiring a Type H, 23/64 inch ID headed bushing per ANSI standards.

Installation Notes

Installation is performed by a machinist or toolmaker using an arbor press or hydraulic press — never drive this bushing with a hammer, as impact installation risks cracking the jig plate bore or distorting the bushing. The receiving bore in the jig plate must be machined to the correct press fit tolerance before installation. Once pressed in, this bushing is not designed for removal and reuse. Power down all equipment and secure the workpiece before drilling operations begin with the jig in service.