Bolt Withdrawal Values in Steel, Alumnium
Bolt Withdrawal Values in Steel, Alumnium
(OP)
I've got a large aluminum sculpture I've been asked to look at. It contains some connections with drilled and tapped holes into the material. The holes don't go through, so there is no nut or washer. So any tension on the bolt is being transferred through the threads of the hole. Could someone recommend reference material for determining the minimum thread length to fully develop a given bolt size?
If someone has the above resource but only for steel, I'd also be interested in seeing that.
Thanks.
If someone has the above resource but only for steel, I'd also be interested in seeing that.
Thanks.
Licensed Structural Engineer and Licensed Professional Engineer (Illinois)





RE: Bolt Withdrawal Values in Steel, Alumnium
Regards,
Mike
RE: Bolt Withdrawal Values in Steel, Alumnium
roymech.co.uk also has (had?) it.
Maybe someone else can help you with a link to somewhere on the www, if not I will gladly scan the pages for you from my version of Machinery's Handbook.
RE: Bolt Withdrawal Values in Steel, Alumnium
Licensed Structural Engineer and Licensed Professional Engineer (Illinois)
RE: Bolt Withdrawal Values in Steel, Alumnium
Regards,
Mike
RE: Bolt Withdrawal Values in Steel, Alumnium
Licensed Structural Engineer and Licensed Professional Engineer (Illinois)
RE: Bolt Withdrawal Values in Steel, Alumnium
http://www.dalecompany.com/pdf/UNBRAKO.pdf
Note their comment on page 64/66 about using figgerin' and cypherin' to come up with tapped hole thread strength being "not entirely satisfactory". Thus what one of the premier fastener makers chose to present in the technical section of their "engineering guide" were tables created using empirical data from tests done with threaded test pieces and real bolts.