Boneham AM00000091 Drill Bushing Hm 20.5 Inch Id

Product Description

The BONEHAM AM00000091 is a press fit headless drill bushing designed to guide drill bits and other cutting tools with precision in metalworking and machining applications. Manufactured from steel and hardened to 60 to 65 HRC, this HM-series bushing provides durable, wear-resistant tool guidance. The inside diameter is 20.5 inches, with a body outside diameter of 30.00 mm and an overall bushing length of 45.00 mm. Installation is by press fit, requiring no additional fasteners or retaining hardware. This bushing meets ANSI standards and is intended for use by machinists, toolmakers, and precision fabricators in production or job-shop environments.

This HM-series headless drill bushing is suited for jig and fixture applications where repeatable hole location accuracy is required. The press fit design makes it appropriate for permanent or semi-permanent installation in drill jigs used in metalworking operations. It is a non-renewable bushing, meaning it is pressed directly into the jig plate without a liner bushing. Typical applications include production drilling, reaming, and boring operations in metal fabrication shops, machine shops, and manufacturing facilities.

Key Features

• HM-series headless design for flush or below-surface installation in drill jigs
• Press fit installation method for secure, permanent seating in jig plates
• Steel construction hardened to 60 to 65 HRC for wear resistance and long service life
• Inside diameter tolerance of +0.007/+0.020 mm for precise tool guidance
• Meets ANSI standards for drill bushing dimensions and performance
• Non-renewable, non-counterbored design for straightforward jig plate integration

Compatibility

Designed as an OEM-style replacement or direct-fit component for HM-series press fit headless drill bushing applications conforming to ANSI standards.

Installation Notes

Installation is performed by machinists or toolmakers using an arbor press or hydraulic press to seat the bushing flush into the prepared jig plate bore. Ensure the receiving hole is machined to the correct interference fit tolerance before pressing to avoid bushing damage or bore distortion. Do not hammer the bushing directly without a proper press fixture, as this can crack or misalign the hardened component. Verify all dimensions and tolerances against the jig design before installation.