Boneham AM00000288 Drill Bushing Hm 8.25 in Id

Product Description

The BONEHAM AM00000288 is a press fit headless drill bushing conforming to the HM industry code. It is manufactured from steel and hardened to 60 to 65 HRC for long service life in high-cycle drilling applications. The bushing features an inside diameter of 8.25 inches with a tolerance of +0.005 to +0.014 mm, a body outside diameter of 15.00 mm, and an overall length of 20.00 mm. It installs without a head, seating flush within a drill jig plate. Machinists, toolmakers, and fixture builders use this bushing to guide drill bits with precision and to maintain hole location accuracy across repeated operations.

This bushing is suited for use in drill jig fixtures found in production machining environments, tool rooms, and fabrication shops. It is appropriate for both light and moderate drilling operations where a non-renewable, press-in design is acceptable. The headless profile allows use in close-clearance layouts where a flanged head would interfere with workpiece clamping or adjacent bushings. The part ships individually and is not counterbored.

Key Features

• HM industry code designation, conforming to ANSI standards
• Press fit installation — no locking hardware required
• Hardened steel construction, 60 to 65 HRC for wear resistance
• Inside diameter tolerance of +0.005 to +0.014 mm for consistent drill guidance
• Headless design for flush seating and close-clearance jig layouts
• Non-renewable bushing — permanent installation in jig plate

Compatibility

Designed as an OEM-style replacement or new-installation press fit headless drill bushing for ANSI-compliant drill jig fixtures requiring an HM-code bushing with an 8.25-inch inside diameter.

Installation Notes

Installation is performed by toolmakers or machinists using an arbor press or hydraulic press to drive the bushing into a prepared jig plate bore. Ensure the receiving bore diameter and finish conform to the press fit tolerance specifications before installation. Once pressed in, the bushing is considered permanent and is not designed for removal and reuse. Follow applicable shop safety procedures and power down any associated equipment before servicing fixtures.