Dry film lubricant for Aluminum/Stainless Steel threaded joint
Dry film lubricant for Aluminum/Stainless Steel threaded joint
(OP)
I have a threaded joint that we are having problems with. The male thread is 304 Stainless and the hole is 6061-T6. thread is 8-32. We are starting to get some failures in the threads (gauling, aluminum shavings...). We continuously use the same steel thread and the aluminum part may see as much as 10 cycles.
Would a dry film lubricant be of benefit on the male thread (such as Loctite 39893). I've never used such a product.
Would a dry film lubricant be of benefit on the male thread (such as Loctite 39893). I've never used such a product.





RE: Dry film lubricant for Aluminum/Stainless Steel threaded joint
I have heard the horror stories about aluminium and stainless steel, but I have not experienced them. Loctite 242 is a medium strength thread-locker, and it is a lubricant. Aluminium is a bad material for tapping. If you are disassembling and reassembling, you should use thread inserts. Helical thread inserts, self tapping inserts and self-clinching nuts all are good.
304 stainless is very soft. Consider not re-using your screws.
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JHG
RE: Dry film lubricant for Aluminum/Stainless Steel threaded joint
We use SSTL fasteners and since the guys finally started using anti-seize faithfully we haven't had any more issues with galling.
RE: Dry film lubricant for Aluminum/Stainless Steel threaded joint
It will also increase the preload for the same tightening torque. Possibly leading to increased thread stripping in the aluminum.
Inserts good.
RE: Dry film lubricant for Aluminum/Stainless Steel threaded joint
Any chance you can fit a thread insert in the aluminium?
“Do not worry about your problems with mathematics, I assure you mine are far greater.” Albert Einstein
RE: Dry film lubricant for Aluminum/Stainless Steel threaded joint
RE: Dry film lubricant for Aluminum/Stainless Steel threaded joint