WD 40 safe to for spraying in electric motor? - HeliFreak
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Old 04-28-2008, 04:43 AM   #1 (permalink)
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Default WD 40 safe to for spraying in electric motor?

Hi,
I need some of your opinions on this. I received my raptor E550 today and sadly the motor seems to have caught a bit of rust. It is not too bad but definitely noticeable. I am concerned that the inside part has also caught some rust and I am considering to spray some WD40 on the coils to loosen up any unwanted rust and prevent any further damage to the motor.

Is that safe or would that totally ruin the motor. I understand that WD40 is safe for applications on electric appliances but when it comes to brushless motors, I am not too sure.

Your views?

Cheers.
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Old 04-28-2008, 05:10 AM   #2 (permalink)
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I would say no. Get some silicon spray.
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Old 04-28-2008, 06:18 AM   #3 (permalink)
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Quote:
Originally Posted by xptical View Post
I would say no. Get some silicon spray.
Yea, that's it. Just spray some sand into it and power up!

(Computer geeks think everything is made of silicon...)

Now, silicone on the other hand... Won't do much to remove rust but probably won't hurt anything in there and 'may' keep it from rusting further...

Personally, and I'm not a chemist... The first thing I would worry about with WD 40 is it penetrating and thinning the grease in the bearings which wouldn't be good. Maybe if you can, take it apart and do the pieces individually. Maybe a little brass wire brush or a good strong toothbrush would help. Of course then there's the sticky stuff that holds the magnets in...

Okay, I'll shut up now. Maybe somebody that REALLY KNOWS what they're talking about (cue Pinecone) can chime in and sort this out.
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Old 04-28-2008, 09:05 AM   #4 (permalink)
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Wasn't WD 40 orignaly made to spray on rocket electronics to drive out mosture?
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Old 04-28-2008, 09:26 AM   #5 (permalink)
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use electrical contact cleaner wd-40 will attract dirt like a magnet
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Old 04-28-2008, 09:30 AM   #6 (permalink)
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also you don't wont anything that will leave a residue on any parts that could catch fire or conducts current..
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Old 04-28-2008, 12:32 PM   #7 (permalink)
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Humm, so what are the options left to me for clearing up this? Any ideas?

thanks.

Cheers
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Old 04-28-2008, 05:55 PM   #8 (permalink)
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they make motor cleaner for rc cars, but that is for blasting dirt out, it might work though, just make sure to lube the bearings before you run it again, and spray it out with compressed air to get the motor cleaner out. Personally, I'd just run the motor, copper coils shouldn't have enough build up on them to cause much of a problem.
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Old 04-28-2008, 07:55 PM   #9 (permalink)
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Yes, WD-40 is safe to use on electronics. It is used frequently to dry out auto ignition systems as it it non-conductive, displaces water, and lubricates the parts without getting sticky. I also use it to clean up and dry out computers and power supplies.

However, to repeat what Taz said, it will penetrate bearings and wash out the grease.

It's great for cleaning and protecting metal things that are going to sit unused for awhile.
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Old 04-28-2008, 08:07 PM   #10 (permalink)
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I doubt your motor has any rust on the inside, almost everything is epoxy coated. If your that worried about it I'd disassemble the motor and visually inspect before you go squirting anything inside.

Worst case the magnets will have a bit of rust that can be removed with a brush, your bearings may have external rust but if they spin smoothly they should be fine.
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Old 04-29-2008, 12:01 AM   #11 (permalink)
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The actual meaning of WD-40 is:
Water Displacement (WD)
40th try (on the 40th experiment, they had the formula they were looking for)

Now ya know.
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Old 04-29-2008, 05:30 AM   #12 (permalink)
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Quote:
Originally Posted by diverjack View Post

Now ya know.
No, now YOU know. I knew that years ago!
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Old 04-29-2008, 12:42 PM   #13 (permalink)
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1st-Use contact cleaner if you feel you must, I doubt you need to for reasons already posted.
2nd WD40 is a great product, I use it all the time
3RD WD40 IS NOT A LUBRICANT, it is a cleaning solvent and a great one but if yu use it to lube it WILL fail you.
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