Boneham P485JW Press Fit Headless Drill Bushing

Product Description

The BONEHAM P485JW is a press fit headless drill bushing used to guide cutting tools with precision in jig and fixture applications. It carries an inside diameter of 0.386 inches (Letter W, Decimal 0.3860 inches) with a body outside diameter of 3/4 inches and an overall length of 5/16 inches. Machined from steel, this bushing is installed without a head, sitting flush within the drill jig plate. The bore holds a tight inside diameter tolerance of plus 0.0001 to plus 0.0005 inches, keeping tool runout minimal and hole placement repeatable. Machinists, tool-and-die makers, and production line technicians install this type of component during fixture setup or jig maintenance.

This bushing suits applications where a permanent, non-renewable press fit installation is required in a steel or hardened jig plate. It is appropriate for production drilling, reaming, and light boring operations in both job-shop and manufacturing environments. The headless design allows flush mounting in close-tolerance jig plates where a flanged head would interfere with workpiece seating or clearance. Industry code P identifies the bushing series, allowing straightforward cross-reference with standard drill bushing specifications.

Key Features

• Inside diameter of 0.386 inches (Letter W) with tolerance of plus 0.0001 to plus 0.0005 inches for precise tool guidance
• Body outside diameter of 3/4 inches and overall length of 5/16 inches for compact jig plate integration
• Headless design allows flush installation where flange clearance is not available
• Steel construction provides durability under repeated drilling and reaming cycles
• Press fit installation method creates a permanent, non-renewable mount — no locking hardware required
• Bushing Industry Code P for straightforward catalog cross-reference

Compatibility

Designed as an OEM-style replacement or new-installation drill bushing for standard P-series jig and fixture plates requiring a press fit headless bushing with a 3/4 inch outside diameter.

Installation Notes

Press fit headless drill bushings are typically installed by machinists or tool-and-die technicians using an arbor press or hydraulic press to drive the bushing into a pre-reamed jig plate hole. Ensure the receiving hole in the jig plate is reamed to the correct fit class before pressing the bushing into place. Because this is a non-renewable bushing, removal will likely damage the bushing or the jig plate bore. Always de-burr and clean the receiving hole before installation to avoid galling the bushing or distorting the inside diameter tolerance.