Boneham P408JH Press Fit Headless Drill Bushing Steel

Product Description

The BONEHAM P408JH is a press fit headless drill bushing used to guide drill bits and other cutting tools with precision in jig and fixture applications. Machined from steel, this bushing carries an inside diameter of 0.358 inches, a body outside diameter of 5/8 inches, and an overall length of 1/2 inches. The inside diameter tolerance is held to a tight plus 0.0001 to plus 0.0005 inches, ensuring accurate, repeatable hole location across production runs. Machinists, tool and die makers, and fixture builders install this type of bushing when consistent drill guidance is required without a locking collar or head flange.

This bushing is suited for use in drill jigs, production fixtures, and tooling plates where a flush, headless installation is required. The press fit design locks the bushing firmly into a prepared bore in the fixture body. It is well-suited for applications where the bushing will remain stationary during the full production run and does not need to be swapped out between operations. Typical settings include metal fabrication shops, machine shops, and manufacturing lines performing repetitive drilling operations.

Key Features

• Inside diameter of 0.358 inches with tolerance of plus 0.0001 to plus 0.0005 inches for precise tool guidance
• Body outside diameter of 5/8 inches for secure press fit seating
• Overall length of 1/2 inches fits shallow-depth fixture plate installations
• Headless design installs flush with the fixture surface, no head flange to interfere with workpiece or clamps
• Steel construction provides hardness and wear resistance for repeated drilling cycles
• Non-renewable press fit style — intended for permanent installation in the jig body

Compatibility

Designed as an OEM-style replacement or new-installation drill bushing for steel jig plates and drill fixtures requiring a headless press fit bushing with a 0.358 inch inside diameter and 5/8 inch outside diameter.

Installation Notes

Installation is performed by a machinist or tool and die maker using an arbor press or hydraulic press to drive the bushing into a precision-reamed bore in the fixture plate. The receiving bore should be machined to the required interference fit tolerance before pressing the bushing in place. Do not hammer the bushing directly without a proper press-fit driver or sleeve, as this can distort the inside diameter. Once pressed in, the bushing is not designed for removal and reuse.