Boneham P138BT Press Fit Headless Drill Bushing

Product Description

The BONEHAM P138BT is a headless, press fit drill bushing designed to guide drill bits with precision in jig and fixture applications. It features an inside diameter of 0.0635 inches (wire size No. 52) with a tight tolerance of +0.0001 to +0.0004 inches, ensuring accurate hole location and consistent drill guidance. The body outside diameter is 13/64 inches and the overall bushing length is 1/2 inch. Manufactured from steel hardened to 60 to 65 HRC, the P138BT delivers the wear resistance required for repeated drilling cycles in production environments. This is a non-renewable, fixed-installation bushing conforming to ANSI standards.

The P138BT suits precision drilling operations in metalworking, tooling, and manufacturing settings where a low-profile, headless design is required. The headless configuration allows the bushing to sit flush within a drill jig plate, making it appropriate for close-tolerance fixturing where a flanged head would interfere with workpiece clearance or mating components. Machinists, tool and die makers, and fixture builders are the primary installers of this component.

Key Features

• Press fit installation method for secure, permanent seating in jig plates
• Headless design sits flush with the jig plate surface
• Inside diameter of 0.0635 inches (wire size No. 52) with +0.0001 to +0.0004 inch tolerance
• Steel construction hardened to 60 to 65 HRC for high wear resistance
• Conforms to ANSI standards for drill bushing dimensions
• Compact 1/2 inch overall length suits thin jig plate applications

Compatibility

Designed as an ANSI-standard press fit headless drill bushing for use in standard drill jig plates requiring a 13/64 inch bore and accommodating a No. 52 wire gauge drill.

Installation Notes

Press fit bushings are installed by a machinist or tool and die maker using an arbor press to drive the bushing flush into a precision-bored hole in the jig plate. The mating bore in the jig plate must be machined to the appropriate press fit tolerance before installation. Never hammer the bushing in directly without a proper driver or press to avoid damage to the bushing or plate. Once installed, this bushing is not designed for removal or replacement.