Boneham AM00000128 Press Fit Headless Drill Bushing Hm

Product Description

The BONEHAM AM00000128 is a press fit headless drill bushing classified under industry code HM. It guides drill bits and other cutting tools to a precise location during machining operations, maintaining hole accuracy across repeated operations. The bushing installs without a head, sitting flush within the jig plate for applications where a low-profile fit is required. With a 3.7-inch inside diameter and a steel construction, this bushing is suited for production drilling jigs in tool and die, machining, and fabrication environments. Machinists and toolmakers are the primary installers. It is a non-renewable type, meaning it is pressed directly into the jig plate and is not designed for quick field exchange.

This bushing is used in drill jig applications where consistent hole location is critical across multiple workpieces. Its headless design makes it well-suited for jig plates where surface clearance is limited or a flush-mounted guide is required. Typical environments include production machine shops, fabrication facilities, and tool rooms handling repetitive drilling operations. The press fit installation method ensures the bushing stays firmly seated under normal drilling loads without additional fasteners.

Key Features

• Press fit installation — no fasteners required, seats securely in the jig plate bore
• Headless HM industry code design for flush, low-profile mounting
• 3.7-inch inside diameter guides tooling with consistent positional accuracy
• Steel construction provides hardness and wear resistance for production drilling use
• Non-renewable design for permanent jig plate installation

Compatibility

Designed as an OEM-style replacement or direct installation bushing for drill jigs requiring a press fit headless HM-type bushing with a 3.7-inch inside diameter.

Installation Notes

Installation is typically performed by a machinist or toolmaker using an arbor press or hydraulic press to seat the bushing flush in the prepared jig plate bore. The receiving bore must be machined to the correct tolerance for a press fit before installation. The bushing should not be hammered in directly without a press, as this risks damage to the bushing or jig plate. Once pressed in, this non-renewable bushing is not intended for removal and reinstallation.