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HelicopterMain Discussion › Loctite 220, 290
12-09-2004 09:47 PM  13 years agoPost 1
Ramster

rrApprentice

NJ

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Anybody using Loctite 220 or 290 wicking grade in their helis with good results?
Both these Loctites are applied to pre-assembled/tightened screws and they penetrate the threads by capillary action.


Ron

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12-09-2004 09:55 PM  13 years agoPost 2
KC

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WA

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290 = green?

I use that instead of blue and red, a little green is like blue, a lot is like red. but I prefer to out some on before putting the parts together.

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12-09-2004 10:03 PM  13 years agoPost 3
Ramster

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NJ

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Yes, it is green.

Did you ever try to apply it to a pre-assembled screw in your heli?

Ron

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12-09-2004 10:28 PM  13 years agoPost 4
RRLL

rrNovice

Israel

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I am using the 290 to stick my clutch bearings to the clutch shaft with good results. It's strong but removable.
I also used it on a short bolt on my new tempest head so I really hope
it will hold....

Ron

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12-09-2004 10:29 PM  13 years agoPost 5
m1ke1

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New Salem, Massachusetts

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I use the 222 on the smaller screws works out great especially on the very small grub screws.

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12-09-2004 11:50 PM  13 years agoPost 6
Dr.Ben

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Richmond, VA, USA

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I've posted this before, but I pull it out when loctite discussions start going the way of color alone. FWIW.


271, Red: High strength threadlocker for larger diameter hardware.

262, Red: High strength threadlocker for for hardware smaller than that which uses 271 (more like heli parts). Either does a good job for our stuff, however. I see 271 most commonly in auto parts stores.

609, Green: Retaining compound, high strength, for mounting slip fit bearings to shafts. An appropriate product for tail boxes.

603, Green: Retaining compound, high strength, similar to 609 but good where the parts may be a little oily. Good for mounting oilite bushings in housings, BTW.

640: Green: Retaining compound, high strength. Similar to 609 and 603. Lacks the oil tolerance of 603. I use it where I might have trouble with adjacent bearing contamination with the product, such as start shaft bearing blocks, since it has a little greater viscosity than 603.

638, Green, rather thick: Ultra strong retaining compound for assemblies with a marked amount of slop in the fit, min 0.004". Don't try to use this stuff for our normal bearings on healthy shafts. It sets almost immediately in the tight gap, and you'll never have the chance to get the bearing into place.

290, Green: Wicking product for thread locking AFTER assembly. Medium strength, much stronger than 242 blue in my experience. Not the correct choice per loctite for bearing mounting.

242, 243 Blue: Classic medium strength threadlocker for most of our threadlocking applications. 243 is the oil tolerant version.

222MS, Purple: Low strength threadlocker for small diameter or otherwise delicate fasteners.

Bottom line:
NEVER choose a loctite product by color alone.

You can build a really good model with 242 for thread locking parts you'll need to remove, 271/262 for screws you really don't want to ever move on their own, and 609/603 for fixturing bearings to shafts. 290 is great for set screws which needed to be tweaked for ideal postition of the part on a shaft (like a bevel gear) and which you don't want to have to go back and remove the screw to apply the loctite.

I know guys use other products for these tasks, but these recs are based on the specs and technical data sheets published by Loctite.

Ben Minor

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12-10-2004 12:21 AM  13 years agoPost 7
YSRRider

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usa

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I found the green is not so penetrating unless you back the nut/screw out a turn or 2 then re tighten it. its less pain than using the blue or red but i prefer the blue over them all!

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12-10-2004 01:24 AM  13 years agoPost 8
Lock-Tite

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Quebec, Canada

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What ... I heard my name ?

Frank
Dont forget to bring a clean pair of shorts when flying 3D ;)

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12-11-2004 04:34 PM  13 years agoPost 9
GMPheli

rrElite Veteran

W. Bridgewater, MA USA

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I have used the wicking 290 to lock bearing to shafts for years and it works great. Make sure everything is nice and clean. I also like to use it when mounting the clutch hub to the engine shaft. You keep loosening and rotating and tightening it until you get it as true as possible, then apply the loctite. If the threads are clean it will wick right in. you can see it. You must remove old loctite before trying to wick more in. I use taps and dies.

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HelicopterMain Discussion › Loctite 220, 290
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