Boneham AM00000252 Drill Bushing Hm 7.25 in Id Steel

Product Description

The BONEHAM AM00000252 is a press fit headless drill bushing designed to guide cutting tools with precision in jig and fixture applications. Built to industry code HM, it features a 7.25-inch inside diameter and a hardness rating of 60 to 65 HRC for long service life under repeated drilling cycles. Constructed from steel, this bushing is pressed directly into a drill jig plate without a head flange, keeping the mounting surface flush. Machinists and toolmakers install this type of bushing where a permanent, non-renewable installation is required and surface clearance is critical.

This bushing is suited for use in production drilling fixtures in both job shop and manufacturing environments. The HM industry code designation indicates its dimensional compliance with ANSI standards, making it a direct fit in standardized jig tooling setups. It is appropriate for use with drill, ream, or other rotary cutting operations where accurate hole location and tool guidance are required. Weighing 0.37 pounds, it is a compact, solid component intended for permanent installation in hardened jig plates.

Key Features

• Press fit installation method for permanent, flush-mount placement in jig plates
• Inside diameter of 7.25 inches with a tolerance of +0.005/+0.014 mm for precise tool guidance
• Steel construction with a hardness of 60 to 65 HRC for wear resistance
• Body outside diameter of 12.00 mm and overall bushing length of 16.00 mm
• Headless design keeps the mounting surface flush — no counterbore required
• Compliant with ANSI standards per HM industry code designation

Compatibility

Designed as an OEM-style replacement or new-install component for ANSI-standard HM-code drill jig and fixture applications requiring a press fit headless bushing.

Installation Notes

Press fit bushings are typically installed by toolmakers or machinists using an arbor press or similar controlled-force press tool. The receiving hole in the jig plate must be machined to the appropriate interference fit tolerance before installation. Once pressed in, this bushing is not intended to be removed or replaced. Always verify hole location and plate hardness requirements before pressing the bushing into place.