Boneham PT125CJ Press Fit Headless Drill Bushing

Product Description

The BONEHAM PT125CJ is a press fit headless drill bushing designed to guide twist drills and reamers with precision during machining and fabrication operations. Built from hardened steel with a surface hardness of 60 to 65 HRC, this bushing resists wear from repeated tool passes. The headless design allows flush installation in jig plates where a protruding flange would interfere. Inside diameter is 0.081 inches (wire size No. 46) with a tight tolerance of +0.0001 to +0.0004 inches, keeping drill runout minimal. Outside diameter is 0.1875 inches and overall length is 0.3125 inches. Machinists, toolmakers, and jig-and-fixture builders are the primary installers.

This bushing is suited for use in drill jigs on production floors, machine shops, and fabrication operations where consistent hole location is critical. The press fit installation method means the bushing is driven or pressed directly into the jig plate bore without a locking mechanism, making it appropriate for permanent or semi-permanent fixture applications. Industry code P identifies this as a standard press fit type per ANSI conventions.

Key Features

• Headless design allows flush, interference-free installation in close-clearance jig plates
• Press fit installation method for secure, permanent seating in fixture bores
• Inside diameter tolerance of +0.0001 to +0.0004 inches for precise drill guidance
• Steel construction hardened to 60 to 65 HRC for extended wear life
• Meets ANSI standards for drill bushing dimensions and tolerances
• Wire size No. 46 ID accommodates standard drill sizes in that range

Compatibility

Designed as an OEM-style and standard replacement press fit headless drill bushing for use in drill jigs and fixture plates requiring an ANSI-compliant P-series bushing with a 0.081-inch inside diameter.

Installation Notes

Press fit bushings are installed by a toolmaker or machinist using an arbor press or shop press to drive the bushing flush into a prepared bore. The receiving bore must be machined to the correct interference fit diameter per ANSI specifications before installation. Do not hammer bushings in freehand, as this can crack the hardened steel or damage the jig plate. Once pressed in, these bushings are not intended for routine removal.