Electronics > Projects, Designs, and Technical Stuff
Product to secure trim pots against vibration
ivan747:
Hi guys, Do you happen to know of a product designed or commonly accepted by the industry as a locking compound for trim pots? I have some tiny trimmers I need to fix in place. I have a product that must be baked at around 70 degrees C and is subject to vibration.
MT:
I was to say your mom's or girlfriend nail polish is splendid. If you dont have a mom or girlfriend you go to those "1 dollar stores" and buy some cans for 2 dollar who will last a life time. The nail polish have the properties of being stiff without cracking. But i dont think it withstand baking at 70 deg, so instead you can use transformer isolation lacquer that is designed for baking process stage in rewinding transformers. This can be had for free from train/power station transformer repair shop.
jhpadjustable:
Loctite SF 7400 is formulated for this application. You might want to ping Henkel and ask how well it stands up to a bit of heat.
tggzzz:
--- Quote from: ivan747 on December 13, 2019, 06:41:12 pm ---Hi guys, Do you happen to know of a product designed or commonly accepted by the industry as a locking compound for trim pots? I have some tiny trimmers I need to fix in place. I have a product that must be baked at around 70 degrees C and is subject to vibration.
--- End quote ---
Even if you lock the screw of the trimpot to the housing, you still have to consider whether the contact will bounce when vibrated. If it is operating while being vibrated, that would be equivalent to introducing noise.
JackJones:
--- Quote from: jhpadjustable on December 13, 2019, 07:00:20 pm ---Loctite SF 7400 is formulated for this application. You might want to ping Henkel and ask how well it stands up to a bit of heat.
--- End quote ---
--- Quote ---It has a service temperature range of -35 to +145°C and is available in a 20 ml pack size.
--- End quote ---
The linked page says up to +145°C, should be plenty of headroom for baking at +70°C
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