Boneham AM00000170 Drill Bushing Hm 4.9 Inch Id

Product Description

The BONEHAM AM00000170 is a press fit headless drill bushing with an HM industry code, designed to guide drill bits and other cutting tools with precision during machining and fabrication operations. Constructed from steel, this bushing presses directly into a jig or fixture plate without requiring a locking collar or flange, keeping the tool profile low and the work surface clear. With an inside diameter of 4.9 inches and a body outside diameter of approximately 0.315 inches (8.00 mm), it is suited for applications where repeatable hole location is critical. Machinists, toolmakers, and fabricators use this type of bushing when building or maintaining drill jigs.

This bushing is appropriate for use in drill jig plates and fixture assemblies where a permanent, non-renewable installation is acceptable. The headless press fit design is common in production environments where jig components are not expected to be replaced after installation. It fits standard tooling applications that call for the HM bushing industry code. Its compact length of 0.472 inches (12.00 mm) suits jig plates of moderate thickness.

Key Features

• HM industry code press fit headless design for permanent jig installation
• Inside diameter of 4.9 inches for precise tool guidance
• Steel construction for durability and wear resistance
• Body outside diameter of 0.315 inches (8.00 mm)
• Overall bushing length of 0.472 inches (12.00 mm)
• Non-renewable installation type — intended as a fixed component

Compatibility

Designed as an OEM-style replacement or new-build component for drill jigs and fixture assemblies requiring HM-coded press fit headless drill bushings.

Installation Notes

Press fit bushings are typically installed by toolmakers or machinist trades using an arbor press to drive the bushing flush with or below the jig plate surface. The receiving hole in the jig plate must be machined to the correct tolerance to achieve the required press fit interference. Always verify fit tolerance against the jig plate material before pressing. Once installed, this non-renewable bushing is not designed for removal and reinstallation.