The culprit is usually setup, material quality, or lubrication. If your tubing bender does not perform to the limits shown in this chart, please call so we can help diagnose the problem. If you want to know what to expect from a specific material, we offer bending diagnostic services. Although the chart below is the result of tests we performed on purchased materials, we cannot guarantee that you will achieve the same results due to the wide variation in material quality from one mill to another. We do our part to ensure that your fab shop runs as smoothly as possible. At Rogue Fabrication we work hard to provide our customers with the most complete and accurate tube bending information available.