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I've ordered these three times. While I cannot give you exact numbers, they are strong enough to keep my scratch built foamie hatches closed using only two of them.
these are plenty strong i can only just split the 10 pack and there tiny , just checking them out in my hands as you do with strong magnets there chipping very easy though
I have a 90 size CF-18 hornet ducted fan,That main canopy has two magnets and the motor cover has three magnets and so far they have never blown off reaching speeds of 100 mph, Highly reccomend thse magnets for whatever project you have .
use these on a SIG somethin extra canopy! and a Skyfun pusher jet canopy! works great never had one come off in flight, yet not hard to remove by hand.
It really depends on how good the fit between the magnet and the surface is if it is a good tight fit then ca will suffice but it is probably better to use epoxy to try and get all around the magnet to stop it popping off
Epoxy is a good adhesive but more permanent in application. For foam and balsa applications, i would suggest UHU por (Yellow and green tube). Apply to both surface and magnet and let dry for 1-3 minutes then attach the magnet to the surface... Strong and removable.
scratching the surface on the side that's being glued down, before gluing will give it more grip and is therefore more likely to stick better as well (than the smooth surface it comes with)
are there any problem if I it close to electronic devices as esc's, gyro's hobbyking control board and such?
I would need to use six in a tricopter frame and around the elctronical components...
These are VERY strong, they will cling to each other from 3-4inches away, so keep that distance away from something affecting by a magnetic field, like a brushless motor. Other electronics will be O.K.
Thank you so much but will the gyro stabilize as always it does or will be any distorsion in the gyro sense.
I´*m worry about it because I dot't really know how gyros work...
J'utilise ces aimants pour maintenir mes capots moteurs et/ou verriere sur de nombreux modèles et je n'ai jamais constaté de probleme avec l'electronique
Are these the magnets I is in motor? I heard they need to be rear earth. I am trying to make a Cd Rom home made motor. how do i cut them into shape? Please
Sally you cannot use these. They cannot be cut. They are very brittle and will break. The may be able to be ground a bit but I would not recommend. These are for (As you can see above) hatches.
Hi, I dont now if they are the same as the ones that come in motor, but that they har very powerfull that they are, have to make some strength to get them appart. But dont try and cut them because they will breack.
If you are experimenting with Magnet motors, these are great but you will want quite a few to get a smooth running Magnet driven motor. They say that the magnets in such a motor will lose their magnetism eventually . not sure I believe that. Also it's Rare Earth and not rear earth...
These magnet are very strong.
If you use two magnet for make a connection a CA glue may not be strong enough. Better a good epoxy
I did use these for connect the winglet my mini wing, making them detachable. I did use standard transparent tape for fix them. Working solid.
If the connection is too strong, use metal to magnet or put a tape in the middle for make the connection weaker.
Epoxy is the best, thin some out with rubbing alcohol (at least 70, 91 preferred). Be careful, a little rubbing alcohol will go a long way. Also, it will take jusy a little longer to cure.
Yes, you can use CA.
Take care, that the magnets are clean.
Optionally you can use sandpaper do achieve a rough surface for better connection. I cover the magnet hole with AC Hinges or a piece of tape.
the best way I found for these magnets to work is to take a dremel and pretty much make a recessed deep enough for the magnet to set in at least 1/4 way and hot glue the back of the magnet let the glue cool for a second or two then place it in or ca approved glue juts enough to make the seal hope this helps
thank you SYPHON but one very important thing i noticed, the magnets tend to lose their magnetic power after heating them. and became like normal metal ....
Every kind of magnet would be destroyed at a specific temperature. This is also true for the magnets in our electric motors. Depending in material and magnetic strength there are different qualities. Usually a stronger magnet is not that temperature tolerant than a magnet with less magnetic strength.
Typical critical temperatures are 80°C or 120°C, special qualities can work up to 200°C.
any one knows how to fit this in a foamy without having it ripped when removing the 2 parts they are supposed to hold. i have a problem if i fit them with Foam glue they come off after few uses, and i held them with a Tape but the magnetic power just got so weak..!! hummmm
Okay, this is definitely not a solution of the problem,, but I get a kick out of making things work that probably shouldn't. What I did to use my earth magnets to secure my wing on my EP Cessna 180 was: I first found out which sides are attracted to each other and taped them down in equal distances from each other along the wing joint (top side of the wall that the wing slots into) and the same for the opposing magnets on under the wing itself. (So that none will try to push instead of pull when you fit the wing if you get me). I then heated up a soldering iron.. (now I did say that this wasn't to the book.. lol), and one by one I would place the magnet ontop of the connecting 'ridgeline', carefully place the fine tip (almost vertically) onto the center of the magnet,, and wait for it to heat up enough to start sinking very slowly into the EP. You need to make sure your magnet is 'sinking' as level as possible, so aim for the center and adjust as you go. I only let the magnet sink about half of its thickness deep, and then took it out, and added 5 minute epoxy to the newly created magnet groove. Then, placed the magnet back ontop and resumed heating using the soldering iron so that the magnet ends up -only just barely protruding above the level of the wingmount ridgeline (thingymabob). Leave it to cool, setting the glue hard in place with melted foam cells securing it in very snugly. Then you can start on the others in the same 'CAREFUL' manner. I know i'll be criticised for doing this, but understand that it was done on a bit of a s****py old project plane, and was more fun preparing than the flying itself.. lol. So, if you've got nothing to lose, and you're determined to use magnets like I was.. if there's a will there's a way. Just remember not to push too hard, or they will sink in too deeply. Also, keep the soldering iron upright, and away from any EP edges, they melt quickly! Be patient, it takes a minute for the small magnets to heat up, using the fine point of the soldering iron, but this whole process was worth it. It's very snazzy now and felt like a bit of an acheivement to actually make it work ! Hope someone finds this somewhat helpful/interesting if not entertaining..! :) Good luck,, and take it easy !
**By the way, when I wrote this reply, it was to a thumbnail-less discussion about 10 peice magnets, I didn't see the picture of the balsa wood plane. Yes obviously it might be difficult and silly on balsa, so please take my last message in reference to EP and hard foam planes. Cheers *)
If you want to close a foamy door,create an housing for magnet on the wall side and fix with foamy glue.
On the door side glue a little piece of iron, you can create by sawing some old computer case iron part. The joint is not so strong like magnet to magnet, but enought to not open the door when you're flying.
Rather than mounting them so they are directly touching when the parts are together, set them back into the foam so that the bond isn't quite as strong. You can simply take a razor knife and make a few slits in the foam ~5mm from the mating edge and push the magnet into the slit.
Your best bet is to drive a length of dowel (6m dia)into the foam, covered with epoxy , then epoxy the magnet onto the end of the stick. The alternative is to see that the magnets don't touch!
thank you SYPHON but one very important thing i noticed, the magnets tend to lose their magnetic power after heating them. and became like normal metal ....
Instead of using two magnets use one magnet and a piece of tin can.
You can actually "tune" the tin can piece by trimming it smaller if the latch is too strong.
I recommend epoxy for attaching both the magnet and the tin.
Glue the piece of tin on or inset it into your surface. After the glue dries on your tin inset your magnet flush with its surface.
Put down a s**** of plastic bag or Saran Wrap between the magnet and the tin. Glue the magnet in place and hold the hatch in place with masking tape until the glue dries.
Either use the Square magnets or dig a hole to set the magnets in to till flush, then also coat the outer surface of the magnet with Epoxy to bind with the material in the hole. Also go for a sliding seperation set up rather than a direct pull arrangement.
I use a drop of CA on the back of the magnet and then cover the magnet in Scotch exreme tape. It holds great if you use plenty of tape (an inch extra tape in all directions).
cut out the hole. glue them in with foam safe glue . and buy some sort of a reinforcement ribbin or tape to cover it.Sort of like how parkzone secures their canopy magnets
i'm sorry but..wtf is up with this site, i had this reserved in my order and now its backordered?? so much for having items reserved anyways! I waited a month for another item now this thing "magically" was removed from my order...guys really ship my stuff out i'm not going to wait half a century!!
Hey people, you see that picture where there are 10 of these lying flat. I am not able to keep tham flat like that... they just keep sticking up!! broke two trying to do that :)
You have to use an pice of sheet-metal as surface. It's recomended to use plastic film between the magnet and the sheet metal to make it easier so shift.
I know what you meant with your calculation, but i think it wasn't the right answer on his question. Everybody can made this calculation with the package weight. Many people care about the real weight of such items. :-)
i'm sorry but..wtf is up with this site, i had this reserved in my order and now its backordered?? so much for having items reserved anyways! I waited a month for another item now this thing "magically" was removed from my order...guys really ship my stuff out i'm not going to wait half a century!!
i'm sorry but..wtf is up with this site, i had this reserved in my order and now its backordered?? so much for having items reserved anyways! I waited a month for another item now this thing "magically" was removed from my order...guys really ship my stuff out i'm not going to wait half a century!!
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