Double Hex Rotary Broach Tool

Double Hex Rotary BroachDouble hexagon rotary broach shapes are popular forms used for driving a fastener with a hex key or socket bit. Typical examples would include custom screws and shaft extensions. Hex keys can be used in more positions with a double hexagon hole, and double hexagon sockets provide more engagement.

Double hex rotary broach tools are all custom made as no international standard exists. However, most are made to the ANSI B18.3 2003 dimensions for Socket Cap, Shoulder and Set Screw Hex Keys. These are the same dimensions used for many of Polygon Solutions’ standard hexagon broaches.

The size of double hexagon that can be made by rotary broaching is limited by the amount of material to be removed. Usually, material removal is limited to .025” per side. This limitation keeps most double hexagon forms under 1/2 inch flat-to-flat dimension.

Oversize pilot holes are required for all double hex rotary broaching applications. The pilot hole will leave a small radius at the inside corners. This radius is often acceptable because contact is still made at the outside corners.

Due to manufacturing limitations, there is a small radius on the broach at the inside corner of a double hexagon. However, this radius cannot be found in the finished product because the oversize pilot hole diameter removes part material in this area. The oversize pilot hole is critical to creating separated chips while broaching and reducing the pressure required to cut the form.

To request a quote on a Double Hex Rotary Broach fill out our online quote form or call us at 239-628-4800.

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