Assembly lubricant for zinc plated bolts and nyloc nuts
Assembly lubricant for zinc plated bolts and nyloc nuts
(OP)
I'm aware of the need to lubricate bolts on assembly to reduce the scatter on preload. Is there a particular lubricant type or viscosity recommended please?
Thanks
Rattler.
Thanks
Rattler.





RE: Assembly lubricant for zinc plated bolts and nyloc nuts
Torque N Tension from Macdermid:
http://www.macindustrialproducts.com/Functional/Fu...
Magni 560 or 580 topcoats from Magni:
http://www.themagnigroup.com/products_500.asp
Deltacoll or Deltaseal from Dörken:
http://www.doerkenusa.com/products.html
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Assembly lubricant for zinc plated bolts and nyloc nuts
RE: Assembly lubricant for zinc plated bolts and nyloc nuts
If good control of preload is important to you in this application you should do your own tests to determine torque vs. preload relationship for whatever you specify. Then get the word out into the shop that using the right stuff is important, and explain why.
RE: Assembly lubricant for zinc plated bolts and nyloc nuts
The products I mentioned are used in high-volume applications for automobiles. If you can't use the lubricant as a pre-applied type, I would try the Macdermid product shown above - I believe it is a simple immersion product, while the others are more complex polymers that require baking to cure the coating. All of this information is for high precision applications. If you can work with less precision, then simple grease, waxes, and oils will be satisfactory.
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Assembly lubricant for zinc plated bolts and nyloc nuts
RE: Assembly lubricant for zinc plated bolts and nyloc nuts
The anti-sieze products work well to prevent galling, but they tend to act more to generate a consistant friction factor rather than a drop in friction. We have had good experience using moly lube to reduce friction, but it is horribly messy and contaminates everything in the general area.
RE: Assembly lubricant for zinc plated bolts and nyloc nuts
Be cautious with electoplated zinc fasteners, the friction can drop so low that a "standard" torque can neck the fastener. Do a trial first and have your assemblers let you know if the sense the bolt was getting easier to turn or softening toward the end.