Boneham PT364IU Headless Drill Bushing 21/64 in Id Steel

Product Description

The BONEHAM PT364IU is a press fit headless drill bushing used to guide drill bits and other cutting tools with precision in jig and fixture applications. Manufactured from steel, this bushing installs permanently into a drill jig plate without a locking head, keeping the top surface flush for applications where a protruding flange is not acceptable. The inside diameter is 21/64 inches with a tolerance of +0.0001 to +0.0005 inches, providing close control over drill bit alignment. The body outside diameter measures 9/16 inches and the overall length is 1/4 inch. It carries industry code P, which identifies its dimensional standard within the drill bushing classification system.

This bushing is suited for use in production and toolroom environments where repeatable hole location accuracy is required. Typical applications include drill jigs, fixture plates, and tooling assemblies used in metalworking and machining shops. The headless design is preferred when clearance above the jig plate is limited or when a smooth top surface is required for workpiece contact. Installation is permanent — this is not a renewable bushing and is not designed for quick-change removal during production runs.

Key Features

• Press fit installation method for permanent, secure seating in jig plate bores
• Headless design keeps the mounting surface flush with the jig plate top
• Inside diameter tolerance of +0.0001 to +0.0005 inches for precise drill guidance
• Steel construction provides durability under repeated drilling cycles
• Industry code P confirms dimensional compliance with standard drill bushing classifications
• Non-renewable design intended for fixed, long-run tooling setups

Compatibility

Designed as a standard P-series press fit headless drill bushing for use in drill jigs and fixture plates requiring a 9/16 inches outside diameter press fit bore and a 21/64 inches drill guide bore.

Installation Notes

Installation is performed by pressing the bushing into a precision-bored hole in the jig plate using an arbor press or hydraulic press — never drive with a hammer directly on the bushing face. The receiving bore in the jig plate must be machined to the appropriate interference fit tolerance to achieve proper retention. Because this is a permanent, non-renewable bushing, the installation location should be finalized before pressing. Always verify inside diameter clearance matches the intended drill or reamer shank size before installation.