Boneham AM00000211 Headless Drill Bushing Hm 5 in Id

Product Description

The BONEHAM AM00000211 is a press fit headless drill bushing in the HM industry code series, designed to guide cutting tools with precision during drilling, reaming, or boring operations. Manufactured from steel with a hardness rating of 60 to 65 HRC, this bushing provides a durable, wear-resistant guide surface in jig and fixture applications. The inside diameter carries a tolerance of +0.004 to +0.012 mm, ensuring accurate tool alignment and repeatable hole placement. It is a non-renewable, fixed installation component intended for permanent press-in mounting into drill jig plates or fixture bodies. Machinists, toolmakers, and fixture builders are the primary installers of this type of component.

This bushing suits applications where a low-profile, headless configuration is required to keep the bushing flush with or below the jig plate surface. The HM designation corresponds to a standard industry body size pairing with a 5.0-inch inside diameter, an 8 mm body outside diameter, and an 8 mm overall length. It is used in production drilling fixtures across metal fabrication, aerospace, automotive, and general machine shop environments wherever consistent hole location is critical.

Key Features

• Press fit installation method for permanent, fixed mounting in drill jig plates
• Headless design allows flush or sub-flush seating in fixture bodies
• Steel construction hardened to 60 to 65 HRC for extended wear resistance
• Inside diameter tolerance of +0.004 to +0.012 mm for precise tool guidance
• ANSI-standard HM industry code sizing for broad fixture compatibility
• Non-renewable design — intended as a permanent fixture element

Compatibility

Designed as an ANSI-standard HM-series press fit headless drill bushing suitable for use in drill jigs and fixtures requiring a 5.0-inch inside diameter guide with an 8 mm body outside diameter.

Installation Notes

Press fit bushings are typically installed by toolmakers or machinists using an arbor press or hydraulic press to seat the bushing flush into a precision-bored hole in the jig plate. The receiving bore in the fixture should be machined to the appropriate interference fit specification per ANSI standards before installation. Do not hammer the bushing in freehand, as this may damage the bore alignment or the bushing itself. Once pressed in, this bushing is not designed for removal and reuse.