Boneham CB00001113 Headless Drill Bushing P 0.246 in Id Steel

Product Description

The BONEHAM CB00001113 is a press fit headless drill bushing designed to guide cutting tools with precision during drilling, reaming, and similar machining operations. Assigned Industry Code P, this bushing features a 0.246 inch inside diameter with a tight tolerance of +0.0001 to +0.0004 inches, ensuring accurate tool guidance and repeatable hole placement. The 7/16 inch outside diameter allows for secure press fit installation into a drill jig or fixture plate without the need for a head flange. Constructed from steel, the CB00001113 is suited for production environments where consistent, high-cycle tooling accuracy is required. Machinists, toolmakers, and jig builders are the primary installers.

This bushing is used in fixed drill jig applications where the bushing is not intended to be removed or replaced during a production run. The headless design keeps the bushing flush with or below the jig plate surface, making it appropriate for close-clearance setups and multi-station fixtures in both job shop and production machine shop environments. With a 1 inch overall length, it provides sufficient tool guidance depth for standard drilling and reaming passes. It is not a renewable bushing, meaning it is pressed in permanently for the life of the jig or until the jig plate is reworked.

Key Features

• Press fit installation — no retaining ring or locking mechanism required
• Headless design for flush or sub-flush mounting in jig plates and fixture blocks
• Inside diameter tolerance of +0.0001 to +0.0004 inches for precise tool guidance
• Steel construction for durability in high-cycle machining applications
• Industry Code P designation for cross-reference compatibility with standard bushing specifications
• Non-renewable design — intended as a permanent press fit installation

Compatibility

Designed as a standard P-series press fit headless drill bushing for use in drill jigs and machining fixtures requiring a 0.246 inch bore and 7/16 inch OD press fit seat.

Installation Notes

Installation is performed by toolmakers or machinists using an arbor press or hydraulic press to seat the bushing into a properly sized hole in the jig plate. The mating bore in the jig plate should be machined to the appropriate interference fit tolerance for the 7/16 inch OD before installation. Do not hammer the bushing in directly without a press driver to avoid distorting the bore. Once pressed in, this bushing is not intended for removal — rework of the jig plate is required if replacement becomes necessary.