Extruded Hole in Steel Stamping
Extruded Hole in Steel Stamping
(OP)
What is the appropriate method to determine the size (hole diameter, extrusion height) of an extruded hole meant to be used as a nut in a given thickness of material. Assuming it is tapped, and assuming a thread cutting screw is used?
Thanks,
Jeff
Thanks,
Jeff





RE: Extruded Hole in Steel Stamping
1. Generally, the height of the extrusion is limited to approximately the stock thickness, meaning an overall height from tip of extrusion to the top of the original sheet thickness of ~ 2-3t. Obviously a 3t height extrusion will have more thinning than the 2t version.
2. Taking into account the unavoidable lead-in or pull-down radius, one can expect a full thread length approximately 1.5x the stock thickness.
The Steel Design Manual from AISI may have more information on this subject. You can obtain this document from the Auto Steel Partnership website using the following link:
http://www.a-sp.org/publications.htm
RE: Extruded Hole in Steel Stamping
I hope this helps.