Boneham AM00000133 Drill Bushing Hm 3.8 in Id

Product Description

The BONEHAM AM00000133 is a press fit headless drill bushing manufactured to HM industry standards. It is designed to guide drill bits with precision during machining and fabrication operations, maintaining accurate hole location and reducing bit wander. Constructed from steel, this bushing is pressed directly into a jig plate or fixture without a head or collar, creating a flush installation. The inside diameter measures 3.8 inches, with a body outside diameter of 7.00 millimeters and an overall length of 8.00 millimeters. Machinists and toolmakers typically install this component during jig and fixture setup in production or job-shop environments.

This bushing is suited for use in drill jigs where a flush, headless profile is required. The HM designation identifies it within the standard industry bushing classification system. It is appropriate for production drilling applications in metal fabrication, tooling, and light manufacturing settings where repeatable hole accuracy is critical. The press fit installation method means no additional fasteners are required to retain the bushing in the jig plate.

Key Features

• HM industry code classification for standard headless drill bushing fitment
• Press fit installation — no retaining hardware required
• Steel construction for wear resistance and durability in repeated drilling operations
• 3.8-inch inside diameter for drill bit guidance
• Non-renewable design — intended as a fixed, permanent jig component
• Flush, headless profile for installations requiring a smooth jig plate surface

Compatibility

Designed as an OEM-style replacement or direct fitment for drill jigs and fixtures requiring an HM-coded press fit headless bushing with a 3.8-inch inside diameter.

Installation Notes

Press fit bushings are typically installed by toolmakers or machinists using an arbor press or hydraulic press. Ensure the receiving hole in the jig plate is machined to the correct interference fit tolerance before pressing the bushing into place. Do not strike the bushing directly with a hammer, as this can damage the bore or distort the bushing body. Confirm the bushing is fully seated and flush before placing the fixture into service.