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Magnetizing warhound's leg/torso joint. Did I buy TOO strong magnet?  [RSS] Share on facebook Share on Twitter Submit to Reddit
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Made in fi
Locked in the Tower of Amareo





For ease of transportation was planning to put magnet on the tab in warhound titan's legs and another on the torso rather than glue them together. Again my big sin "buy first, plan then" hits. I basically just measured how wide the tab is and figured I can fit 2cm wide magnet so that's what I ordered.

I just got them and now I'm wondering are these too strong...Damn it feels like strong bond. Albeit when they are glued I have better surface to pull from but I still fear I might actually break the(rather expensive even though I bought it 2nd hand so didn't have to pay full price) titan by pulling it too hard!

So who here has magnetized same part and how big rare earth magnet you used for it?

Site claims strenght is 3.4kg for these ones for record. Think 1cm one that has 1.3kg would have been sufficient as well. Not like I was planning on hanging it around anyway. Just move it around by legs.

Good news is I haven't yet drilled holes so at worst I need to buy new magnets! 1cm ones would cost 7 euro's though minimum order is 15e(but I can always add some more magnets for infantry/etc magnets) with 9e shipping so at most I lose money here a bit.

This message was edited 3 times. Last update was at 2017/12/01 06:45:36


2024 painted/bought: 109/109 
   
Made in hr
Dakka Veteran





Croatia

2 cm is pretty big. What is the strenght of the magnet? And by that I mean that there should be a number between N1 and N54. The strength in kilos is theoretical and not what you get in practice.

I do commissions:
https://www.playsupport.art/ 
   
Made in gb
Longtime Dakkanaut




Nottingham, UK

You can also slightly weaken the pairing (and make it less likely to pull the magnet out) by covering the magnet with a thin sheet of plastic or paper and epoxy resin.

 
   
Made in fi
Locked in the Tower of Amareo





 Power Elephant wrote:
2 cm is pretty big. What is the strenght of the magnet? And by that I mean that there should be a number between N1 and N54. The strength in kilos is theoretical and not what you get in practice.


S-20-02-N
Disc magnet Ø 20 mm, height 2 mm
Neodymium, N45, nickel-plated

So seems 45.

winterdyne wrote:
You can also slightly weaken the pairing (and make it less likely to pull the magnet out) by covering the magnet with a thin sheet of plastic or paper and epoxy resin.


Actually the magnets came with some sort of plastic thing. I was considering drilling holes bit deeper and put one inside when putting in as it seems to ease taking one out. Maybe not permanently glue it(though why not). Might ease up a bit.

That or just pay up for smaller ones. Wonder what size would actually be good for this. And also for weapons I would like suggestions assuming I can figure out way to detach them(they were glued in originally).

2024 painted/bought: 109/109 
   
Made in gb
Longtime Dakkanaut




Nottingham, UK

If I remember rightly the legs weigh around 750g when assembled, and the torso and weapons about 1.5kg, with most of the weight (depending on pose) forward of the waist.

You'll need a fairly strong magnet pair, the tendency of the torso is to lean forward and the socket for the waist join is not particularly deep. This said, it is also quite shallow under the torso - you'll ned to cut down the cylinder on the hip section a bit to fit your magnet into the upper torso, especially if you're going to cover it.

I'd definitely fit the upper torso magnet permanently and cover that as it's the one that'd be the most awkward to refit if it gets pulled loose.

 
   
Made in au
Grizzled Space Wolves Great Wolf





winterdyne wrote:
You can also slightly weaken the pairing (and make it less likely to pull the magnet out) by covering the magnet with a thin sheet of plastic or paper and epoxy resin.
Yeah, here's a website that can estimate the magnetic strength reduction for adding something that separates the magnets....

https://www.kjmagnetics.com/calculator.asp
   
Made in us
Blood-Raging Khorne Berserker





Pittsburgh, PA

If you're worried about it, maybe try magnetize it in such a way that you can slide the parts apart as opposed to pulling them apart? Its just an idea
   
Made in us
Lone Wolf Sentinel Pilot





Los Angeles, CA, USA

Another option is to use a piece of steel sheet on one half and the magnet on the other half.
   
Made in au
Anti-Armour Swiss Guard






Newcastle, OZ

Also, when separating, do NOT try to pull them apart, instead SLIDE them apart. The force needed to separate them is a lot less that way. Pulling them apart also puts a lot of strain on the glue bonds holding them in place, risking you pulling the magnets free of their mountings.

Magnetic attraction decreases over distance and even the thickness of paper will show a reduction in "grab strength".

I'm OVER 50 (and so far over everyone's BS, too).
Old enough to know better, young enough to not give a ****.

That is not dead which can eternal lie ...

... and yet, with strange aeons, even death may die.
 
   
Made in au
Grizzled Space Wolves Great Wolf





 Todosi wrote:
Another option is to use a piece of steel sheet on one half and the magnet on the other half.
Just an FYI, a magnet in contact with another magnet is pretty much the same strength as a magnet in contact with steel because the magnet induces a magnetic field in the steel.

There's only a reduction in strength if the steel you use is a specific alloy which has reduced magnetism or if you separate the magnet and the steel (because when they're separated it reduces the ability of the magnet to induce a field within the steel).
   
 
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