Boneham AM00000135 Drill Bushing Hm 3.9 Inch Id

Product Description

The BONEHAM AM00000135 is a press fit headless drill bushing in the HM industry-code style, manufactured from hardened steel for precision hole-location work in jigs and fixtures. With a 3.9-inch inside diameter and a body outside diameter of 7.00 mm, this bushing guides drill bits, reamers, and similar cutting tools to maintain accurate and repeatable hole placement. Hardness is rated at 60 to 65 HRC, providing the wear resistance required in production drilling environments. The headless design allows the bushing to sit flush within the jig plate. Machinists, tool-and-die makers, and precision fabricators install this component in drill jig assemblies across manufacturing and metalworking applications.

This bushing suits production jig work where controlled tool guidance is required. The HM industry code designates its dimensional standard, making it a recognized specification across machine shops and tool rooms. It is appropriate for use in fixed jig plates where a flush, non-renewable bushing is acceptable. The press fit installation method locks the bushing securely into the jig plate bore without additional hardware. It is compatible with applications following ANSI standards for drill bushing dimensional requirements.

Key Features

• HM industry-code headless press fit design for flush jig plate installation
• Hardened steel construction rated at 60 to 65 HRC for extended wear life
• 3.9-inch inside diameter with an inside diameter tolerance of +0.004/+0.012 mm for precise tool guidance
• Body outside diameter of 7.00 mm and overall bushing length of 16.00 mm
• Non-renewable fixed bushing — intended for permanent press fit seating
• Meets ANSI dimensional standards for drill bushings

Compatibility

Designed as an ANSI-standard HM-style press fit headless drill bushing suitable for use in drill jig plates requiring a fixed, non-renewable bushing at a 3.9-inch inside diameter.

Installation Notes

Press fit bushings are installed by machinists or tool-and-die makers using an arbor press or similar controlled-force equipment. The receiving bore in the jig plate must be machined to the correct interference fit tolerance before installation. Once pressed into position, the bushing is not intended for removal or reuse. Ensure all cutting and pressing operations are performed with the workpiece properly secured and clear of personnel.