Boneham AM00000276 Drill Bushing Hm 7.8 Inch Id

Product Description

The BONEHAM AM00000276 is a press fit headless drill bushing built to industry code HM. It guides drill bits and other cutting tools with precision during machining and fabrication operations. The bushing is made from steel and is installed without a head flange, making it suited for applications where a flush or recessed fit is required. With a 7.8-inch inside diameter and a body outside diameter of 12.00 millimeters, this bushing is sized for repeatable, accurate hole positioning in jigs and fixtures. It is a non-renewable type, meaning it is pressed directly into the jig plate and is not designed for toolless removal and replacement.

This bushing is used in metalworking, tooling, and precision machining environments. It fits into drill jig plates and fixtures where consistent hole location is critical across production runs. The HM industry code designation identifies the bushing size class, allowing machinists and toolmakers to match it against standard jig plate boring specifications. Typical installers include tool and die makers, fixture builders, and machining shop technicians working in both job shop and production settings.

Key Features

• Press fit installation method holds the bushing firmly in the jig plate bore without fasteners
• Headless design allows flush or recounted seating in the mounting plate
• HM industry code for straightforward cross-reference with standard bushing charts
• Steel construction provides wear resistance during repeated drilling operations
• Non-renewable design for permanent, stable installation in dedicated fixtures
• Inside diameter of 7.8 inches for precise tool guidance

Compatibility

Designed as an OEM-style replacement or new-installation press fit headless drill bushing for standard HM-code drill jig plates and fixtures in metalworking and tooling applications.

Installation Notes

Installation is performed by qualified toolmakers or machining technicians using an arbor press or similar pressing equipment. The jig plate bore must be machined to the correct tolerance to accept a press fit without distorting the bushing. Deburr and clean the bore before pressing to ensure proper seating. Once installed, this non-renewable bushing is not intended to be removed without replacement of the bushing and possible re-boring of the jig plate.