A friend of mine claims the torque value for any given fastener changes when anti-seize cream is used.
Is there any merit to his claim? Would the torque values in the manual change if I used a "lubricant" on the threads?
Thank you,
Duane
The torque value doesn't change, but you get a proper torque value as the lubrication prevent the excessive friction of dry fasteners.
Anti-seize is a whole nother topic...
Randy - RPM
Thanks for the answer.
When you say anti-seize is a whole different topic, do you mean in regards to torque values?
Thank you, Duane
addendum.. I've been using this high temp Loctite brand, copper stick
https://www.napaonline.com/en/p/NCB37616?cid=paidsearch_shopping_dcoe_google&gclid=CjwKCAjwtNf6BRAwEiwAkt6UQmRYG16tNYxamxoJO6Z9L2bSZYsZjIYh0r_ryleUJI__QNK6ceg4ZhoCKs0QAvD_BwE (https://www.napaonline.com/en/p/NCB37616?cid=paidsearch_shopping_dcoe_google&gclid=CjwKCAjwtNf6BRAwEiwAkt6UQmRYG16tNYxamxoJO6Z9L2bSZYsZjIYh0r_ryleUJI__QNK6ceg4ZhoCKs0QAvD_BwE)
Maybe this information may help concerning Anti-seize is used.
https://www.rocol.com/knowledge-centre/rocol_expert/a-deeper-understanding-of-anti-seize (https://www.rocol.com/knowledge-centre/rocol_expert/a-deeper-understanding-of-anti-seize)
Fred
As a rule of thumb, 90% of the torque applied to tightening a bolt/nut is spent overcoming friction between the threads and under the head of the bolt/nut, which is split roughly 50/50. So, using something that alters that friction, such as lubricants (or anti-seize) or being dry, will significantly change the clamping force for the same torque value. Unless otherwise specified, quoted torque values are based on clean threads and engine oil.
If using a specific lube for a particular application, like say a head, it will probably come with a table of adjusted torque values or nominate a % discount. As for the effect of anti-seize on clamping force for a given torque value, certainly it will change it but I have no working knowledge of by how much, to me, anything that needs to be torqued doesn't need anti-seize, in fact, I hardly use it on anything. Haha, this leads into one of my bug bears, the over use of anti-seize and loctite, but that's another story.
Anti-seize and thread assembly lube are not the same thing.
Noel
There are several considerations. If you can, use hardened washers, they make a big difference in appllied torque. I use blue lock tight on all bolts that must stay tight for safety reasons...ie where if they loosen I'd end up on my head. Fork clamping bolts for example. On my race bike I safety wire these so no lock tight on those. Every winter I do an extensive check on most bolts, pull them one at a time, clean with a wire brush wheel and an internal wire brush with a drill motor on the internal threads. My technique works but it is a giant PIA. The only problem Ive ever had was with the locking nuts on the chain tensioner...these get a daily inspection. Buy a good torque wrench, one that has been calibrated, and store it at it's lowest setting.
Right now I'm using anti-seize cream on any steel-fastener that goes into aluminum. I've had real problems with electrolysis or galvanic corrosion.
Also, I'll use anti-seize-cream on bolts I know I won't touch again for a long long time. (like stuff under the seat)
So far I torque everything to the manual's spec. (Maybe I shouldn't if it has anti-seize?)
Quote from: duanelr on September 08, 2020, 10:07:33 PM
Right now I'm using anti-seize cream on any steel-fastener that goes into aluminum. I've had real problems with electrolysis or galvanic corrosion.
Get the right stuff! This is what I use and what is recommended by folks vastly more experienced than myself (which is why I use it) although I've never really had a problem on bikes or cars in this regard, if it's your bike you're referring to.
(https://www.blackwoods.com.au/gasket-material-packing-seals/compounds-jointing/duralac-jointing-compound/compound-jointing-duralac-105ml-115ml/p/03413539/medias/AMI-03413539.jpg?context=bWFzdGVyfHJvb3R8NDc1OTl8aW1hZ2UvanBlZ3xoNDUvaDFmLzkxOTg4ODE0Mzk3NzQuanBnfDQ3NWVmMGQ5MTlkZjVhYTU1YTgwZWY1ZmMwOTQzZGExZDAyYjJlZTViZDJjZTQyNWJhZWIxYWY1OGE1OWNiNjg)....
...it's precisely what it's made for.
(https://www.amisales.com.au/images/news/galvaniccorrosion.jpg)
Noel