Boneham PT285HW Press Fit Headless Drill Bushing Steel

Product Description

The BONEHAM PT285HW is a press fit headless drill bushing designed to guide drill bits and other cutting tools with precision in metalworking and machining applications. Manufactured from steel, this bushing carries an inside diameter of 0.281 inches and a body outside diameter of 7/16 inches, with an overall length of 5/16 inches. It is classified under industry code P and installs without the use of a locking collar or head, seating flush within the jig plate. The inside diameter tolerance of +0.0001 to +0.0005 inches ensures consistent tool guidance and repeatable hole location across production runs. Machinists, tool-and-die makers, and jig builders rely on this type of bushing to maintain accuracy in drill jigs and fixtures.

This bushing is suited for use in drill jigs, fixture plates, and tooling setups where a headless, non-renewable bushing is the specified configuration. The press fit installation method means the bushing is driven or pressed directly into the jig plate bore and is intended to remain fixed for the life of the jig. It is appropriate for standard production environments where the bushing does not require routine replacement and where a flush, snag-free surface is preferred. This type is commonly used in light to medium-duty drilling operations across manufacturing and fabrication shops.

Key Features

• Inside diameter of 0.281 inches with a tolerance of +0.0001 to +0.0005 inches for precise tool guidance
• Body outside diameter of 7/16 inches and overall length of 5/16 inches
• Headless design seats flush with the jig plate surface
• Press fit installation — no locking collar required
• Steel construction for durability in production drilling applications
• Non-renewable bushing type, intended for permanent jig installation

Compatibility

Designed as an OEM-style replacement or direct-fit component for drill jigs and fixture plates requiring a P-series press fit headless drill bushing with a 0.281-inch inside diameter and 7/16-inch outside diameter.

Installation Notes

Installation is performed by machinists or toolmakers using an arbor press or similar pressing equipment to seat the bushing into a precision-bored hole in the jig plate. The bore in the receiving plate must be machined to the appropriate tolerance for an interference fit before pressing the bushing in place. Do not hammer the bushing in without proper support, as this can damage the bore geometry or distort the bushing. Once pressed in, this bushing is not designed for removal or reuse.