Testament Posted July 21, 2008 Share Posted July 21, 2008 I've got to replace some bits of the sills on the 131, and need to drill out a few spot welds to replace part of the lower section, has anyone used those spot weld drills or not? any general tips? I figing a good centrepunch on the middle of the spot weld and have a go with a regular drill first unless those spot weld drills with the point in the middle and flat in the rest are that much better? Link to comment Share on other sites More sharing options...
Brock-Lee Posted July 21, 2008 Share Posted July 21, 2008 spotweld drills are much better, I used a normal drill firt up and because of the angle on the tip you end up drilling through both panels before it cuts the spot right out. Link to comment Share on other sites More sharing options...
Testament Posted July 21, 2008 Author Share Posted July 21, 2008 ok next question then, where can I buy them? do any of the regular shit places (repco etc.) sell them or only specialist panel/paint shops? Link to comment Share on other sites More sharing options...
durty Posted July 21, 2008 Share Posted July 21, 2008 spot weld drills are ftw Link to comment Share on other sites More sharing options...
thminiman Posted July 21, 2008 Share Posted July 21, 2008 someone chuck a pic of one plz Link to comment Share on other sites More sharing options...
Brock-Lee Posted July 21, 2008 Share Posted July 21, 2008 I dont know where you buy them from, I borrowed mine. Any eng supply shop should have them, try repco but im not sure if they stock them Link to comment Share on other sites More sharing options...
thminiman Posted July 21, 2008 Share Posted July 21, 2008 thaught so, you'd be able to regrind a normal drill bit to that stz Link to comment Share on other sites More sharing options...
Mk1Mad Posted July 21, 2008 Share Posted July 21, 2008 Try these guys: http://www.tradetools.co.nz/dbsweb/TTLW ... 456&CLASS= under jobber drills.. Link to comment Share on other sites More sharing options...
Dell'orto Posted July 21, 2008 Share Posted July 21, 2008 Repco can get them, but they're a procure item ie not stocked. Link to comment Share on other sites More sharing options...
crazy_rich Posted July 21, 2008 Share Posted July 21, 2008 yo, my technique is, sand off the paint so you can see exactly where the spot weld is, centre punch it, then pilot it with a 3mm drill (doesnt matter too much if you go right through, though its best not to). I sharpened a normal 8mm drill like the picture above, then drill evenly as common sense would dictate until you get the puff of rusty dust which indicates you're through. you can also get a drill called a zipcut, never used one, but they look pretty nifty. Link to comment Share on other sites More sharing options...
Gaz Posted July 21, 2008 Share Posted July 21, 2008 Repco didnt even know what I was talking bout when I got mine. I paid $25 in the end from an engineering type shop. Tool shed prob has them, hit up Alister on here. Also just buy one, making one would be gay, they have a tiny tip at the end which your couldnt make very easily. Link to comment Share on other sites More sharing options...
Guest vvega Posted July 21, 2008 Share Posted July 21, 2008 any drill with a non standered sharpening is called a jobber some people also call the spotface drill or counterbores Link to comment Share on other sites More sharing options...
Unclejake Posted July 22, 2008 Share Posted July 22, 2008 The trick to using a spot weld bit is not to go through the 'parent' material. There will usually be a puff of rust and a change in tone when you have gone far enough. Things get a bit more tricky when steel dashboards are invloved as there can be three layers of different thickness steel spot welded to gether and the layer you can't get at is the thinnest one A cold chisel will come in handy too. Plug welds FTW Link to comment Share on other sites More sharing options...
Guest vvega Posted July 22, 2008 Share Posted July 22, 2008 yeah drilling right though and turning your car into swiss cheese turns a ezy job into something that is just shit to fix repair or work with Link to comment Share on other sites More sharing options...
crazy_rich Posted July 22, 2008 Share Posted July 22, 2008 if you do go right through with the drill, hold/clamp a bit of clean flat copper over the hole and weld it all up, also i find a heavy duty paint scraper better than a cold chisel for breaking free the panels, doesnt munt them up as much. Link to comment Share on other sites More sharing options...
Brock-Lee Posted July 22, 2008 Share Posted July 22, 2008 if you do go right through with the drill, hold/clamp a bit of clean flat copper over the hole and weld it all up, also i find a heavy duty paint scraper better than a cold chisel for breaking free the panels, doesnt munt them up as much. Fuck yea, had to do that heaps in the ute. I just got a bit of copper pipe and beat it flat then held it up with pliers and it worked mint. for bigger stuff I used an old dolly that was lying around. Makes it so much easier for amatures to mig thin panels. Link to comment Share on other sites More sharing options...
tortron Posted July 22, 2008 Share Posted July 22, 2008 spoons ftw Link to comment Share on other sites More sharing options...
lowlancer Posted July 22, 2008 Share Posted July 22, 2008 I purchased mine from Super Shit for like $10 Link to comment Share on other sites More sharing options...
Testament Posted July 22, 2008 Author Share Posted July 22, 2008 does it actually work, or is it made of yoghurt and you need tortrons spoon? Link to comment Share on other sites More sharing options...
thminiman Posted July 22, 2008 Share Posted July 22, 2008 was a supercheap earlier and had a look, they had ones that where quite small, probably only 3mm, Link to comment Share on other sites More sharing options...
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