Boneham P408JB Press Fit Headless Drill Bushing Steel

Product Description

The BONEHAM P408JB is a headless press fit drill bushing designed to guide cutting tools with precision during drilling, reaming, and boring operations. Manufactured from steel, this Type P bushing features an inside diameter of 11/32 inches with a close tolerance of +0.0001 to +0.0005 inches, an outside diameter of 5/8 inches, and an overall length of 1/2 inch. It is pressed directly into a jig plate or fixture body without a head flange, keeping the top surface flush. Machinists, tool and die makers, and fixture builders rely on this type of bushing to maintain hole location accuracy across production runs.

The P408JB is suited for use in drill jigs and fixture assemblies in both job shop and production machining environments. The headless design makes it the right choice when a flush or counter-bored installation is required and clearance above the jig plate is limited. It is a non-renewable fixed bushing, meaning it is intended for permanent installation into the fixture for the life of the tooling setup.

Key Features

• Press fit installation - seats permanently into jig plate or fixture bore
• Headless design provides flush top surface for low-clearance applications
• 11/32 inches inside diameter with tight tolerance of +0.0001 to +0.0005 inches for accurate tool guidance
• Steel construction for durability under repeated drilling cycles
• Industry standard Type P bushing code for straightforward replacement sourcing
• Non-renewable fixed bushing - suitable for dedicated, long-run fixture setups

Compatibility

Designed as a direct OEM-style replacement or new-installation Type P headless press fit drill bushing for standard drill jig fixtures requiring an 11/32 inches bore and 5/8 inches OD press fit seat.

Installation Notes

Press fit bushings are typically installed by a machinist or toolmaker using an arbor press to seat the bushing flush into a precision-bored fixture hole. Ensure the receiving bore in the jig plate matches the specified outside diameter tolerance before pressing to avoid distortion of the bushing ID. Do not drive the bushing in with an impact tool, as this can damage the bore or shift the bushing out of alignment. Once pressed in, the bushing is not intended to be removed or reused.