Boneham HT368JB Press Fit Headed Drill Bushing Type H

Product Description

The BONEHAM HT368JB is a Type H press fit headed drill bushing designed to guide drill bits with precision in jig and fixture applications. It features an inside diameter of 11/32 inches with a tight tolerance of +0.0001 to +0.0005 inches, a body outside diameter of 9/16 inches, and a head outside diameter of 11/16 inches. The bushing is manufactured from steel hardened to 60 to 65 HRC, providing long service life under repeated drilling cycles. The head design seats flush against the jig plate surface, keeping the bushing positively located during operation. Machinists, toolmakers, and fixture builders install this component when a fixed, non-renewable bushing solution is required.

The HT368JB is used in drill jigs, production fixtures, and tooling plates across metalworking and manufacturing environments. Its press fit installation method makes it well suited for permanent installations where the bushing will not need to be swapped between runs. With a length under head of 1/2 inch and a head height of 3/32 inch, it fits standard jig plate thicknesses commonly encountered in light to medium production work. This bushing conforms to ANSI standards, making it compatible with standardized tooling layouts.

Key Features

• Type H headed design with 11/16 inch head outside diameter for positive seating against jig plate
• Inside diameter of 11/32 inches held to +0.0001 to +0.0005 inch tolerance for consistent drill guidance
• Steel construction hardened to 60 to 65 HRC for wear resistance under high-cycle use
• Press fit installation — non-renewable, fixed position once installed
• 1/2 inch length under head suits standard jig plate thicknesses
• Conforms to ANSI standards for compatibility with standardized fixture layouts

Compatibility

Designed as an ANSI-standard press fit headed drill bushing for use in drill jigs and production fixtures requiring a permanent, non-renewable Type H bushing with an 11/32 inch bore.

Installation Notes

Press fit bushings are installed by machinists or toolmakers using an arbor press or similar controlled-force equipment to seat the bushing without damaging the bore or head. The receiving hole in the jig plate must be machined to the appropriate interference fit tolerance before installation. Once pressed in, the HT368JB is not designed for removal or reuse. Verify jig plate thickness and bushing length under head before pressing to ensure proper seating depth.