Boneham P4812JQ Press Fit Headless Drill Bushing

Product Description

The BONEHAM P4812JQ is a press fit headless drill bushing designed to guide drill bits and cutting tools with precision in metalworking and fabrication applications. This bushing features a 0.375 inch inside diameter with a tight tolerance of +0.0001 to +0.0005 inches, ensuring consistent hole location accuracy. The body outside diameter measures 0.75 inches and overall length is 0.75 inches. Manufactured from steel hardened to 60 to 65 HRC, the P4812JQ resists wear under repeated drilling cycles. It conforms to ANSI standards and is non-renewable, meaning it is pressed permanently into the jig plate.

This drill bushing is used in drill jigs and fixture plates across machine shops, tool rooms, and production environments. The headless profile allows for flush installation where a collar or flange would interfere with workpiece clearance or jig plate geometry. Industry code P identifies the bushing series, which is a standard designation for press fit headless types used by toolmakers and machinists when building or refurbishing drill fixtures. It is suited for production drilling operations where positional accuracy and bushing rigidity are critical.

Key Features

• Press fit installation method for permanent, rigid seating in jig plates
• Headless design allows flush mounting where flanged bushings would not fit
• Inside diameter tolerance of +0.0001 to +0.0005 inches for precise drill guidance
• Steel construction hardened to 60 to 65 HRC for extended wear life
• ANSI-compliant dimensions for interchangeability with standard tooling
• Non-renewable design suited to permanent fixture applications

Compatibility

Designed as an ANSI-standard press fit headless drill bushing for use in drill jigs and fixture plates requiring a P-series bushing with a 0.375 inch inside diameter and 0.75 inch outside diameter.

Installation Notes

Installation is performed by machinists or toolmakers using an arbor press or hydraulic press to seat the bushing flush into a precision-bored jig plate hole. The mating hole in the jig plate must be bored to the correct interference fit tolerance to achieve proper retention. Do not hammer the bushing in without a proper driver to avoid distorting the inside diameter. Once pressed in, the bushing is not intended to be removed or replaced.