Boneham P328GD Press Fit Headless Drill Bushing

Product Description

The BONEHAM P328GD is a press fit headless drill bushing designed to guide drill bits, reamers, and other cutting tools with precision during machining and fabrication operations. Manufactured from steel with a hardness rating of 60 to 65 HRC, this bushing resists wear under repeated tooling cycles. It features a 0.201 inch inside diameter (Wire Size 7) and a 1/2 inch outside diameter, with an overall length of 1/2 inch. The headless design allows flush installation into jig plates and fixtures without a flange protruding above the surface. Machinists, tool and die makers, and fabrication shops rely on this type of bushing to maintain consistent hole location and extend the service life of drill jigs.

The P328GD fits standard drill jig applications requiring a press fit, non-renewable bushing with a compact profile. It is suited for production drilling setups in metalworking environments where close tolerances are required. The inside diameter tolerance of plus 0.0001 to plus 0.0004 inches ensures controlled fit with standard drill bit shanks. This bushing is appropriate for use in ferrous and non-ferrous workpiece applications across light manufacturing, toolroom, and maintenance environments.

Key Features

• Press fit installation method for secure, permanent seating in jig plate bores
• Headless design allows flush mounting with no flange above the jig surface
• Steel construction hardened to 60 to 65 HRC for extended wear resistance
• Inside diameter tolerance of plus 0.0001 to plus 0.0004 inches for precise tool guidance
• Meets ANSI standards for drill bushing dimensions and fitment
• Non-renewable design suited for fixed, high-volume production jig applications

Compatibility

Designed as an OEM-style drill jig component compatible with standard press fit bushing bores per ANSI specifications. Fits jig plates machined to accept a 1/2 inch outside diameter press fit headless bushing with Bushing Industry Code P dimensions.

Installation Notes

Press fit bushings should be installed by a machinist or toolmaker using an arbor press or hydraulic press to drive the bushing squarely into a properly sized and finished bore. Measure the jig plate bore to confirm correct interference fit before pressing. Do not use a hammer directly on the bushing face, as this can damage the ID tolerance or distort the bushing body. Always verify bushing seating depth and alignment before use in a production drilling setup.