Boneham P485JN Press Fit Headless Drill Bushing

Product Description

The BONEHAM P485JN is a press fit headless drill bushing designed to guide drill bits and boring tools with precision in jig and fixture applications. Built from steel, this bushing measures 0.368 inches in inside diameter, 0.75 inches in outside diameter, and 0.3125 inches in overall length. The inside diameter holds a close tolerance of +0.0001 to +0.0005 inches, ensuring repeatable hole location accuracy. It installs without a head, sitting flush with or below the surface of a drill jig plate. Machinists, tool and die makers, and fixture builders use this type of bushing to maintain consistent drill alignment across production runs.

The P485JN suits metalworking and fabrication environments where a permanent, non-renewable press fit bushing is required. It is appropriate for use in drill jigs, fixtures, and tooling plates in both job shop and production machining settings. The headless design is preferred when clearance above the jig plate surface is limited or when a smooth top surface is required for workpiece contact or part nesting. Industry bushing code P confirms the dimensional series and allows cross-referencing with standard tooling catalogs.

Key Features

• Press fit installation method — no set screw or locking collar required
• Headless design sits flush or below the jig plate surface
• 0.368 inch (Letter U) inside diameter with +0.0001 to +0.0005 inch tolerance for accurate drill guidance
• Steel construction for durability in repetitive drilling applications
• Industry bushing code P for standard catalog cross-reference
• Non-renewable fixed bushing for permanent jig installations

Compatibility

Designed as an OEM-style replacement or new-install option for press fit headless drill bushings conforming to industry bushing code P with a 0.368 inch inside diameter and 0.75 inch outside diameter.

Installation Notes

Installation is performed 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 interference fit to achieve proper retention. Never drive the bushing with a hammer directly on the bore face, as this can distort the inside diameter and compromise drill guidance accuracy. Follow applicable shop standards and fixture design guidelines for bushing interference fits and jig plate material selection.