Aluminum Extrusion Troubleshooting

Screw-boss tearing

Problem Description

Material tearing occurs around screw bosses, compromising strength and geometry.

Cause–Correction Mapping
  • Bearing lengths in screw-boss too long
    Cause in: Die

      Corrections

    • Shorten and blend bearing via milling/grinding.

  • Lack of feed to screw-boss
    Cause in: Die

      Corrections

    • Grind feed to screw-boss area.

      Disadvantage: May weaken die.

Please note that the information provided in this article is intended to be a general guide to the causes and corrections of Screw-boss tearing in aluminum extrusion. However, it is important to note that the specific cause and correction of any particular defect will vary depending on the specific extrusion process, alloy, and other factors. Therefore, it is important to consult with an experienced and professional engineer to ensure that the correct diagnosis is made and the most suitable correction is chosen.