Boneham P486JB Press Fit Headless Drill Bushing Steel

Product Description

The BONEHAM P486JB is a press fit headless drill bushing designed to guide twist drills and reamers with precision during machining and fabrication operations. Manufactured from steel, this P-series headless bushing installs flush with the jig plate surface, making it suitable for applications where a protruding head would interfere with the workpiece or fixture. The inside diameter measures 11/32 inches with a tight tolerance of +0.0001 to +0.0005 inches, ensuring accurate tool guidance and repeatable hole location. The body outside diameter is 3/4 inches and the overall bushing length is 3/8 inches. Machinists and tool-and-die technicians install this bushing as a fixed, non-renewable guide in drill jigs and fixtures.

This bushing is suited for use in production and job shop environments where consistent hole placement is required across multiple workpieces. The headless design keeps the bushing profile low, which is particularly useful in tight fixture layouts or when the drill must clear a closely spaced surface. It is a fixed installation component, pressed directly into a prepared hole in the jig plate and not intended for removal or replacement after installation. Common applications include drilling, reaming, and light countersinking operations in metalworking, manufacturing, and maintenance repair settings.

Key Features

• Press fit installation method for secure, permanent seating in jig plate
• Headless design sits flush with jig surface, eliminating interference with workpieces
• Inside diameter tolerance of +0.0001 to +0.0005 inches for precise tool guidance
• Steel construction provides durability under repeated drilling cycles
• Non-renewable fixed bushing for stable, long-term fixture use
• Compact 3/8-inch overall length suits thin jig plate applications

Compatibility

Designed as a P-series press fit headless drill bushing for use in standard drill jig fixtures requiring an 11/32-inch inside diameter guide bore and a 3/4-inch outside diameter press fit bore in the jig plate.

Installation Notes

Installation is performed by a machinist or tool-and-die technician using an arbor press or hydraulic press to seat the bushing flush into a precision-bored hole in the jig plate. The receiving hole in the jig plate must be machined to the appropriate interference fit tolerance to ensure proper retention. Do not hammer the bushing in freehand, as this can damage the bore or misalign the bushing. This is a permanent, non-renewable bushing and is not designed for field removal once pressed in.