Mopar McNeer Posted March 8, 2012 Report Share Posted March 8, 2012 Well, I got pwned by my reading skills again. I recently placed an order from Trooperbay.com and picked up two 10 pks of Rare Earth Magnets. What I didn't do was to read the fine print that said that these were 5/16" in diameter. So when I got my order and realized that I didn't order the larger ones (the ones I see in most project logs that are about the size of a quarter or so), I had a major :facepalm: moment. I should have known when the price was just $3.50/10 pk. lol So now I need to get some larger (correctly sized) Rare Earth Magnets and I had hoped to get some feedback, links, and pricing from my fellow FISD crew. If you can provide some insite, I would greatly appreciate it. While I'm waiting, I'll post up a couple of pictures that show the size of the Earth Magnets I purchased from Trooperbay.com so you too can share in my fail. Quote Link to comment Share on other sites More sharing options...
john danter Posted March 8, 2012 Report Share Posted March 8, 2012 I use eBay I can't remember the shop but there are lots and lots on there All shapes and sizes. Quote Link to comment Share on other sites More sharing options...
TK9477 Posted March 8, 2012 Report Share Posted March 8, 2012 Here's my shop is choice http://e-magnetsuk.com/ Quote Link to comment Share on other sites More sharing options...
RogueTrooper[TK] Posted March 8, 2012 Report Share Posted March 8, 2012 If you are wanting the strongest, look for N52, or the next closest to it. Ebay: http://www.ebay.com/...cat=0&_from=R40 magnets for less: http://www.magnet4le...x.php?cPath=122 Quote Link to comment Share on other sites More sharing options...
M Rose[TK] Posted March 8, 2012 Report Share Posted March 8, 2012 Hey Josh! I actually did the exact same thing as you and ended up with the small magnets too! I now have purchased these magnets http://www.amazon.co...s00_i00_details. Tested them out and think they are gonna work pretty well. Definately strong, still sporting a bruise from where I got pinched! Quote Link to comment Share on other sites More sharing options...
xaoslord Posted March 8, 2012 Report Share Posted March 8, 2012 (edited) Lee Valley all the way: --------- Edited December 20, 2021 by gmrhodes13 link not working removed Quote Link to comment Share on other sites More sharing options...
Mopar McNeer Posted March 8, 2012 Author Report Share Posted March 8, 2012 Thanks Everyone. I love seeing so many good options and hearing from peoples experiences. Quote Link to comment Share on other sites More sharing options...
TK-7186[TK] Posted March 8, 2012 Report Share Posted March 8, 2012 (edited) I purchased mine from-------------- as well. Buy extra. After three months of building I lost a good amount from them slipping out of my hand and crashing into another manget or metal opject. After a few times of that they shatter. -Gerrit Edited December 20, 2021 by gmrhodes13 link not working removed Quote Link to comment Share on other sites More sharing options...
Mopar McNeer Posted March 8, 2012 Author Report Share Posted March 8, 2012 ANOTHER QUESTION... So I know that the thicker the magnet, the stronger the bond.... For Example, say you had two magnets, both in 1" Diameter, but one was 1/8" thick, the other 1/4" thick. I assume the thicker magnet would have a higher strength, correct? How does it work when you stack them, does anyone know exactly how the strength multiplies (adds up)? Say the 1/8" thick one has a force capable of holding 18 lbs, while the 1/4" thick one can hold 28 lbs. If I stack two 1/8" ones together, does it just double (ie: 18+18 = 36)? Or does the strength degrade once stacked (I assume it probably would). Basically, am I better off stacking 2- 1/8" ones rather than going with just one 1/4" one? Any input on this? Quote Link to comment Share on other sites More sharing options...
Mopar McNeer Posted March 17, 2012 Author Report Share Posted March 17, 2012 Any more input guys and gals? Quote Link to comment Share on other sites More sharing options...
tkrestonva[TK] Posted March 17, 2012 Report Share Posted March 17, 2012 Keep in mind you don't need an extreme amount of pull strength, you are simply gluing a couple of pieces of plastic together. I can't answer you question about precisely how magnetic strength increases in proportion to thickness (other than it definitely does increase), but it seems simpler to just go with the single thicker magnet as opposed to stacking thinner magnets. You would eventually need to separate the stacked magnets (no mean feat), and there is always the risk of the magnets colliding with each other and shattering. Quote Link to comment Share on other sites More sharing options...
Mac Bragg Posted March 21, 2012 Report Share Posted March 21, 2012 Harbor Freight - 10 for $1.99 SALE $1.29! http://www.harborfreight.com/10-piece-rare-earth-magnets-67488.html Quote Link to comment Share on other sites More sharing options...
matt black Posted March 21, 2012 Report Share Posted March 21, 2012 A bit off topic but I got the small ones first like you but found them really useful for covering screw heads around the home like in ceiling light fixings and such. They look much nicer than a screw head. Sorry to derail. Quote Link to comment Share on other sites More sharing options...
TK9477 Posted March 21, 2012 Report Share Posted March 21, 2012 Any more input guys and gals? It's pretty much right - you take 2 magnets that can hold 10kg, put them together then you have 1 magnet that can hold 20kg Quote Link to comment Share on other sites More sharing options...
TK-4510[TK] Posted March 21, 2012 Report Share Posted March 21, 2012 Thank you so much for the feedback Josh. I have updated the listing on the 5/16 inch x 1/8 magnets to more clearly show the size in the title listing. I have also responded to requests to offer larger magnets and now offer 3/4 inch x 1/8 N52 Rare Earth Magnets. You can buy them in a 5 or 10 pack. http://trooperbay.com/34-inch-x-18-inch-thick-n52-rare-earth-magnets/ Quote Link to comment Share on other sites More sharing options...
Mopar McNeer Posted March 21, 2012 Author Report Share Posted March 21, 2012 Thank you so much for the feedback Josh. I have updated the listing on the 5/16 inch x 1/8 magnets to more clearly show the size in the title listing. I have also responded to requests to offer larger magnets and now offer 3/4 inch x 1/8 N52 Rare Earth Magnets. You can buy them in a 5 or 10 pack. http://trooperbay.co...-earth-magnets/ Awesome! Thanks for doing that. I'll be ordering some soon. Quote Link to comment Share on other sites More sharing options...
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