Boneham AM00000258 Drill Bushing Hm 7.3 Inch Id

Product Description

The BONEHAM AM00000258 is a press fit headless drill bushing in the HM industry code series, manufactured from steel for use in precision drilling and machining operations. This bushing features an inside diameter of 7.3 inches, a body outside diameter of 12.00 millimeters, and an overall length of 16.00 millimeters. It is designed to guide drill bits accurately through jig plates, maintaining hole location and reducing wear on tooling. Machinists, tool-and-die makers, and CNC setup technicians install this style of bushing into drill jig fixtures where a flush, headless profile is required to clear workpiece surfaces or mating fixture components. It is not designed to be renewable or field-replaced once pressed in.

This drill bushing is suited for production drilling applications where repeatable hole placement is critical. The headless HM design sits flush with the jig plate surface, making it appropriate for close-tolerance work in automotive, aerospace, and general metalworking environments. It installs without a retaining head, relying entirely on press fit retention in the jig plate bore. The steel construction provides durability under repeated drill pass cycles.

Key Features

• HM industry code series headless design for flush-mount jig plate installation
• Inside diameter of 7.3 inches for precise drill bit guidance
• Body outside diameter of 12.00 millimeters for standard jig plate bore fitment
• Overall bushing length of 16.00 millimeters
• Steel construction for long service life under repeated drilling cycles
• Press fit installation method for secure, non-renewable retention

Compatibility

Designed as an OEM-style replacement or new-installation drill bushing for use in press fit drill jig fixtures requiring an HM series headless bushing with a 7.3 inch inside diameter.

Installation Notes

Press fit drill bushings are installed by tooling specialists or machinists using an arbor press or hydraulic press sized for the bushing outside diameter and jig plate bore. The jig plate bore must be machined to the correct tolerance to achieve proper press fit retention before installation. Once pressed in, this bushing is not designed for removal or reuse. Follow applicable shop safety procedures and ensure the jig plate is secured before applying press force.