Boneham P488IM Press Fit Headless Drill Bushing Steel

Product Description

The BONEHAM P488IM is a press fit headless drill bushing designed to guide cutting tools with precision in jig and fixture applications. Manufactured from steel, this bushing installs without a retaining head, making it suitable for flush or recessed mounting in drill jigs where clearance is limited. The inside diameter measures 0.3125 inches with a close tolerance of +0.0001 to +0.0005 inches, ensuring consistent tool guidance and hole location accuracy. The body outside diameter is 3/4 inches and the overall length is 1/2 inches. Machinists, toolmakers, and fixture builders working in production or job-shop environments are the primary installers of this component.

This bushing is used in drill jig assemblies where repeatable hole location is required across multiple workpieces. The headless profile keeps the bushing flush with the jig plate surface, which is useful in applications where a headed bushing would interfere with workpiece seating or tool travel. Industry code P identifies this as a standard press fit type within the Boneham bushing system, simplifying cross-reference and replacement ordering. It is appropriate for use in both light-duty and moderate-production drilling, reaming, and spotfacing operations.

Key Features

• Press fit installation - no retaining hardware required
• Headless design for flush or recessed mounting in jig plates
• Inside diameter tolerance of +0.0001 to +0.0005 inches for precise tool guidance
• Steel construction for durability in repeated drilling operations
• Industry code P for straightforward catalog cross-reference
• Non-renewable bushing - permanent press fit installation

Compatibility

Designed as a standard P-series press fit headless drill bushing for use in drill jig plates and tooling fixtures requiring a 5/16-inch ID, 3/4-inch OD headless bushing with a 1/2-inch overall length.

Installation Notes

Press fit bushings are installed by toolmakers or machinists using an arbor press or similar fixture press - never drive with a hammer directly on the bushing face. The jig plate bore should be machined to the appropriate interference fit tolerance before installation. Once pressed in, this bushing is not designed for removal or replacement. Verify bore alignment and cleanliness before pressing to avoid galling or misalignment.