Boneham H325HU Press Fit Headed Drill Bushing Steel

Product Description

The BONEHAM H325HU is a press fit headed drill bushing designed to guide cutting tools with precision during drilling, reaming, and similar machining operations. Conforming to Type H industry standards, this bushing features a 0.277 inch inside diameter (Letter J) with a tight tolerance of +0.0001 to +0.0005 inches, a 1/2 inch body outside diameter, and a 5/16 inch length under the head. Constructed from steel, it is a fixed, non-renewable bushing intended for permanent installation in jig plates. Machinists, toolmakers, and manufacturing maintenance technicians install this component in drill jig fixtures to maintain accurate hole location and extend tool life across production runs.

This bushing is suited for use in drill jig applications in both production shop and maintenance environments. Its headed design seats flush against the jig plate surface, resisting thrust forces generated during drilling. The press fit installation method locks the bushing securely in the jig plate bore without fasteners, making it appropriate for high-repeat machining setups where positional accuracy is critical. It is typically used in metalworking, fabrication, and industrial tooling applications.

Key Features

• Type H press fit design for permanent, fixed installation in drill jig plates
• 0.277 inch (Letter J) inside diameter with +0.0001 to +0.0005 inch tolerance for precise tool guidance
• 1/2 inch body outside diameter and 5/16 inch length under head
• Headed configuration with 39/64 inch head outside diameter and 7/32 inch head height to resist axial thrust
• Steel construction for durability in production machining environments
• Non-renewable, single-piece fixed bushing — no liner bushing required

Compatibility

Designed as a standard Type H press fit headed drill bushing for use in drill jig plates with a 1/2 inch bushing bore. Conforms to industry standard H-series bushing dimensions for interchangeability in compatible tooling fixtures.

Installation Notes

Installation is performed by toolmakers or machining professionals using an arbor press to seat the bushing into a precision-reamed jig plate bore. The jig plate bore must be machined to the correct interference fit tolerance before installation. Once pressed in, the bushing is not designed for removal or replacement. Ensure the jig plate is secure and properly supported before pressing the bushing to prevent damage to the bore or the bushing head.