Boneham H485JQ Press Fit Headed Drill Bushing Type H

Product Description

The BONEHAM H485JQ is a Type H press fit headed drill bushing used to guide drill bits with precision in jig and fixture applications. It features an inside diameter of 0.375 inches with a tolerance of +0.0001 to +0.0005 inches, a body outside diameter of 0.75 inches, and a length under head of 0.3125 inches. The head outside diameter measures 0.921875 inches with a head height of 0.21875 inches. Machined from steel, this bushing is pressed directly into a drill jig plate and is not designed for renewal or replacement in the field. Machinists, tool and die makers, and fixture builders install this component during jig fabrication or repair.

The H485JQ is suited for industrial machining environments where repeatable hole location accuracy is required. It is used in drill jig plates on production lines, machine shops, and fabrication facilities where fixed-location drilling guidance is needed. Because it is a permanent press fit design, it is typically installed once and remains in place for the life of the jig. The steel construction makes it appropriate for moderate to high production drilling cycles.

Key Features

• Press fit installation method - no fasteners or locking mechanisms required
• Type H headed design provides a positive stop against the jig plate surface
• Inside diameter tolerance of +0.0001 to +0.0005 inches for precise drill guidance
• Steel construction for durability in production drilling applications
• Non-renewable fixed bushing - designed for permanent installation in jig fixtures
• Counterbored: No - installs flush into a standard straight-bore jig plate hole

Compatibility

Designed as an OEM-style fixed press fit drill bushing for use in standard Type H drill jig plates and fixtures requiring a 0.75 inch body outside diameter bore.

Installation Notes

Installation is performed by machinists or toolmakers using an arbor press or hydraulic press to drive the bushing into a precision-reamed hole in the jig plate. The jig plate bore must be machined to the appropriate interference fit tolerance before installation. Always ensure the jig plate and bushing are free of burrs and debris prior to pressing. Once installed, this bushing is not intended for removal and reuse.