The W-style design will raise the properties of the tube, so if bending, expanding, drilling, or other operations are to be done to the tube, another design style should be consideredĮven with the limitations of the W-style, it remains a widely used and acceptable method for designing tooling. We recommend replacing the #1 top rolls for various gauges. Although it is not recommended, this style can be used when running multiple tube and pipe sizes, as long as the smallest size is not less than 80% of the largest size.This flat spot can remain in the strip through the sizing rolls, so it is very important to work the second pass to take out the center “hump” from the “W” pass. The tube can have a flat spot if the second pass is not built for the correct gauge and used properly.
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