View Single Post
  #21  
Old 01-05-2022, 01:04 PM
andrewwynn's Avatar
andrewwynn andrewwynn is offline
Member
 
Join Date: Jun 2015
Location: Racine, WI
Posts: 10,818
andrewwynn will become famous soon enough
Quote:
Originally Posted by 2004bmwx53i View Post
Just to be nerdy, I found some info regarding the yield of 160. Yield is stress with units of pressure like psi, torque is of unit length x force. So they can't be compared. Please have a look at the link below (the tables) and let me know what you think (I get yield of 940 and proof load of 630 MPa). This has become an interesting discussion.Thanks

https://www.boltdepot.com/fastener-i...ade-Chart.aspx

You misunderstood me.

I was saying that you prob wouldn't reach yield until about 160 N·m where 122 is spec. (that could be off a fair amount it might not be a direct ratio).

Reality check;

M10 10.9 spec is 66 N·m and ratio to yield: 88 N·m. In testing, it was right about 90 N·m where the bolt went to plastic and the torque stopped climbing. BTW: a very very weird experience to turn a bolt 45° and no change in torque!

So: a 12mm should handle 140-150 N·m before damage. You should be able to torque to 122 limitless times.

So back my original stance: no problem at all to reuse, i would throw on thread lock if I had handy but wouldn't go out of my way if I didn't.
__________________
2011 E70 • N55 (me)
2012 E70 • N63 (wife)
Reply With Quote

Sponsored Links