Boneham H328HU Press Fit Headed Drill Bushing Steel

Product Description

The BONEHAM H328HU is a Type H press fit headed drill bushing designed to guide cutting tools with precision during drilling, reaming, and boring operations. Manufactured from steel, this bushing features a 0.277 inch inside diameter and a 1/2 inch body outside diameter, with a length under the head of 1/2 inch. The headed design seats flush against the jig plate surface, providing a positive stop that resists axial movement under cutting loads. The inside diameter tolerance of +0.0001 to +0.0005 inches ensures consistent tool guidance and repeatable hole location across production runs. It is a permanent, non-renewable bushing installed by press fit into a prepared receiver hole in a drill jig or fixture.

This bushing is used in tooling and fixture applications across precision machining, metalworking, and fabrication environments. It is suited for drill jig plates where a permanent guide bushing is required and tool changes through the bushing are not needed. The press fit installation method makes it appropriate for high-volume production fixtures where the bushing position must remain fixed. Machinists, toolmakers, and fixture builders typically specify this bushing for jigs handling standard fractional and letter-size drill bits, reamers, and similar guided cutting tools.

Key Features

• Type H headed design provides a positive axial stop against the jig plate surface
• Press fit installation method locks the bushing permanently in the receiver bore
• Inside diameter tolerance of +0.0001 to +0.0005 inches for precise tool guidance
• Steel construction for durability under repeated cutting tool contact
• Head outside diameter of 39/64 inch and head height of 7/32 inch for positive seating
• Non-renewable design suited for permanent fixture applications

Compatibility

Designed as a permanent press fit headed drill bushing for use in drill jigs and machining fixtures requiring a fixed, non-renewable guide bushing with a 0.277 inch inside diameter bore and 1/2 inch body outside diameter.

Installation Notes

Press fit bushings are installed by toolmakers or machinists using an arbor press or hydraulic press into a precisely reamed receiver hole in the jig plate. The receiver hole should be machined to the correct interference fit tolerance before installation. Do not strike the bushing head directly with a hammer, as this can damage the head seating surface or distort the bore. Once pressed in, this bushing is not intended to be removed or replaced without reworking the fixture plate.