magnetic earth lead welder!

[johnakay]

has any one used one of these??

http://www.ebay.co.uk/itm/Magnetic-...818?pt=LH_DefaultDomain_0&hash=item2ebda32eea


http://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=m570.l2736&_nkw=Magnetic+Ground+Clamp


AH ITS OK ITS BEEN ANSWERED IN PREVIOUSE POST

 

[tttonyyy]

That's cool. I didn't know I wanted one until your post.

 

[BrokenBiker]

i like it, but what about when welding non magnetic stuff?

for instance i have a sheet, of what i assumed was bright mild steel, but its not magnetic, yet welded to mild steel box nice and strong.

deff not magnetic though as my welders magnets wouldnt hold it to the box

i should know what type of steel this is as im doing a properties of materials btec and hnc course lol

 

[cumbriasteve]

That's cool. I didn't know I wanted one until your post.

You also don't know how long you will spend cleaning the damn thing of every bit of spatter and metallic debris it will attract...I have one and it's been relegated to my 'handy stuff I won't ever use but scared to throw away box'

 

[tttonyyy]

I would guess the problem with them is swarf sticking to the magnet, but can't it just be wiped off when the magnet is switched off?

 

[Lawnmowerboy]

Apart from the fact you can't switch the bloomin things off.

 

[tttonyyy]

Ah I see - best avoided then. Sounded like a good idea, shame about the practicalities

 

[octo0072000]

Apart from the fact you can't switch the bloomin things off.

advert say you can turn the magnet on and off ??

http://www.ebay.co.uk/itm/Magnetic-...818?pt=LH_DefaultDomain_0&hash=item2ebda32eea

 

[cumbriasteve]

advert say you can turn the magnet on and off ??

http://www.ebay.co.uk/itm/Magnetic-...818?pt=LH_DefaultDomain_0&hash=item2ebda32eea

So it does.. hmmmm

Not sure how a turn of the knob, which seems the only option, will shield all the magnetic attraction.

Impressive video though....
http://www.youtube.com/watch?v=8d-VV11sLIc&feature=related

 

[tttonyyy]

I think that's it - when it's on it'll attract all manner of steel fragments and filings, it might turn off enough to detach from the workpiece but I can't believe all the swarf will just fall off too. Presumably the swarf itself will retain some residual magnetism if nothing else.

 

[awemawson]

I think all the knob does is poke a screw down jacking the magnet off the surface unlike the more expensive dti mounts that rotate poles to oppose rather than add.

 

[cumbriasteve]

I think all the knob does is poke a screw down jacking the magnet off the surface unlike the more expensive dti mounts that rotate poles to oppose rather than add.

I was thinking the same at first but there does not appear to be much thread showing, I now think it rotates the magnet so the poles counteract each other...if that makes sense, I am no magnet expert by a long shot.

 

[DangerStevie]

They have 2 rare earth magnets inside, turn one way to align the poles and it's magnetised and turn the opposite way to oppose the poles and the magnetic fields cancel each other out so it's then demagnetised. They are useful but as said only on magnetic stuff, the swarf easily wipes away on the good ones (magswitch) .

 

[neilarmo]

wrap it in a thick plastic bag to stop swarf sticking to it.

 

[Robotstar5]

wrap it in a thick plastic bag to stop swarf sticking to it.

Then put it on a shelf and use a proper clamp

 

[Big Pete]

I've got a much more basic version of that was extremely useful when doing some welding on a car tailgate, there wasn't anywhere that was easy or sensible to get a normal earth clamp onto.

 

[Lawnmowerboy]

wrap it in a thick plastic bag to stop swarf sticking to it.

It then defeats the object of being an earth clamp does it not?!

 

[M@tt]

It then defeats the object of being an earth clamp does it not?!

i think that's why there was a whistle smiley after it

 

[oilcooled :)]

Same as the contact switch on a magnetic toolmakers vice on a surface grinder, the knob must turn the core?

 

[ned]

so yay or neigh?

i like gadgets!