Boneham P4812JW Press Fit Headless Drill Bushing

Product Description

The BONEHAM P4812JW is a press fit headless drill bushing designed to guide drill bits with precision in jig and fixture applications. Built from steel, this bushing features an inside diameter of 0.386 inches (Letter W) and a body outside diameter of 0.75 inches, with an overall length of 0.75 inches. The headless design allows the bushing to sit flush with the jig plate surface, making it suitable for applications where a protruding head would interfere with the workpiece or tooling setup. The inside diameter tolerance of +0.0001 to +0.0005 inches ensures consistent drill guidance and repeatable hole placement across production runs.

This bushing is used in metalworking, machining, and fabrication environments where a permanent, non-renewable drill guide is required. Press fit installation makes it ideal for fixed jig plates where the bushing will not need to be replaced during the service life of the fixture. Machinists and toolmakers install this type of bushing in drill jigs, assembly fixtures, and transfer tooling to maintain accurate hole location tolerances across multiple workpieces.

Key Features

• Press fit installation method for permanent, fixed mounting in jig plates
• Headless design sits flush with the jig surface, no protrusion above the plate
• Inside diameter of 0.386 inches (Letter W) with +0.0001 to +0.0005 inches tolerance for precise drill guidance
• Body outside diameter of 0.75 inches and overall length of 0.75 inches
• Steel construction for durability in production drilling applications
• Non-renewable bushing — intended as a permanent fixture component

Compatibility

Designed as an OEM-style replacement or direct fitment for standard P-series press fit headless drill bushing applications conforming to Bushing Industry Code P specifications.

Installation Notes

Press fit bushings are installed by machinists or toolmakers using an arbor press or hydraulic press to drive the bushing into a precision-bored hole in the jig plate. The receiving bore must be machined to the correct tolerance to achieve a proper interference fit — consult the bushing manufacturer specifications for recommended bore dimensions. Because this is a non-renewable bushing, removal typically damages the bushing and may affect the jig plate bore. Ensure the bushing is fully seated and flush before use.