Boneham H484IO Press Fit Headed Drill Bushing Steel

Product Description

The BONEHAM H484IO is a Type H press fit headed drill bushing machined from steel for use in drill jigs and fixture plates. It features an inside diameter of 0.316 inches with a tolerance of +0.0001 to +0.0005 inches, a body outside diameter of 0.75 inches, and a head outside diameter of 59/64 inches. The bushing presses permanently into a jig plate to guide drill bits, reamers, or other cutting tools with repeatable positional accuracy. Machinists, toolmakers, and fixture builders install this type of bushing when a non-renewable, fixed-position guide is required for production or prototype drilling operations.

This bushing is suited for use in drill jig applications across general machining, metalworking, and manufacturing environments. The headed design seats flush against the top surface of the jig plate, controlling the depth the bushing sits relative to the workpiece. With a length under head of 0.25 inches and a head height of 7/32 inches, it fits standard jig plate thicknesses used in light to medium production work. It is not counterbored and is not designed to be renewable or interchangeable once installed.

Key Features

• Type H press fit installation — no locking pins or fasteners required
• Inside diameter of 0.316 inches with tight tolerance of +0.0001 to +0.0005 inches for accurate tool guidance
• Head outside diameter of 59/64 inches seats against the jig plate face
• Steel construction provides durability in repeated drilling cycles
• Non-renewable design — permanent installation once pressed into the jig plate
• Length under head of 0.25 inches suits standard jig plate thicknesses

Compatibility

Designed as a permanent press fit replacement or new-installation drill bushing for Type H headed bushing applications in drill jigs and fixture plates requiring a 0.316 inch inside diameter and 0.75 inch body outside diameter.

Installation Notes

Installation is performed by toolmakers or machinists using an arbor press or hydraulic press to seat the bushing into a properly reamed jig plate hole. The mating hole in the jig plate must be machined to the appropriate press fit tolerance for the 0.75 inch body outside diameter before installation. Once pressed in, the bushing is not intended to be removed or replaced. Always verify inside diameter clearance for the intended tool shank before pressing the bushing into the plate.