What are the tolerance capabilities for the extrusion process?
Aluminum extrusions are manufactured routinely to the close dimensional tolerances required for parts that must fit snug with other parts. Cost is minimized when an extruded product is designed to function well at standard production tolerances. However, tighter, custom tolerances can be specified when necessary. Specific information can be found in three publications: Understanding Aluminum Extrusion Tolerances, 1995, Drafting Standards for Aluminum Extruded Products, 1998, and American National Standard Dimensional Tolerances for Aluminum Mill Products, ANSI H35.2-2000. All of these are available from the Aluminum Association.
