Boneham P486JR Press Fit Headless Drill Bushing

Product Description

The BONEHAM P486JR is a press fit headless drill bushing designed to guide cutting tools with precision in jig and fixture applications. With an inside diameter of 0.377 inches (Letter size V, Wire size P) and a body outside diameter of 3/4 inch, this bushing provides accurate hole location and consistent tool guidance across production runs. The overall bushing length is 3/8 inch. Hardness is rated at 60 to 65 HRC, making it suitable for repetitive drilling operations where wear resistance is critical. It is a non-renewable, headless design installed via press fit into a drill jig plate or fixture body. Machinists, toolmakers, and fixture builders are the primary installers.

This bushing is used in manufacturing and fabrication environments where precise drill guidance is required. Typical applications include production drilling jigs, assembly fixtures, and inspection fixtures in machine shops and metalworking facilities. The headless profile sits flush with the jig plate surface, making it appropriate for close-clearance layouts where a flanged head would interfere with workpiece access or adjacent bushings. It is well-suited for both low-volume prototype tooling and high-volume production fixture applications.

Key Features

• Press fit installation — no set screws or retaining hardware required
• Headless design sits flush with jig plate surface for close-clearance layouts
• 60 to 65 HRC hardness for extended wear life in repetitive drilling operations
• Inside diameter tolerance of +0.0001 to +0.0005 inches ensures accurate tool guidance
• Steel construction for durability in metalworking fixture environments
• Meets ANSI standards for drill bushing dimensions and tolerances

Compatibility

Designed as an OEM-style replacement or new-installation drill bushing for standard press fit headless bushing applications conforming to ANSI drill bushing specifications.

Installation Notes

Installation is performed by toolmakers or machinists using an arbor press to seat the bushing into a prepared jig plate bore. The receiving bore in the jig plate must be machined to the correct press fit tolerance to ensure proper retention and alignment. Do not hammer the bushing directly without a proper driver or press — doing so can damage the bushing bore or distort the outer diameter. Because this is a non-renewable bushing, removal typically requires the bushing to be pressed out and replaced.