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 Post subject: Spot Weld Drills
PostPosted: Sun Dec 04, 2011 2:38 pm 
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Joined: Wed Dec 01, 2010 2:11 pm
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Location: Goulburn NSW
Afternoon All,

Just looking for some recommendations for a bit to drill out the spot welds for my various repairs :)

Ian

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PostPosted: Sun Dec 04, 2011 2:52 pm 
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I got mine from a seller on eBay. Haven't used them yet so can't report how good they are. About $12 each from memory.

Cheers,

Dicko.


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PostPosted: Sun Dec 04, 2011 3:06 pm 
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Joined: Mon Jan 16, 2006 1:15 pm
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Location: Melbourne
I got one like a mini hole-saw with a spring-loaded centre. It works OK, but it's very easy to chip a tooth off which makes it real hard to control. It likes to grab and goes off-centre, you really need a small hole rather then a centre punch to keep it on centre.

Lately I have just been using a drill bit, about 8mm, sharpened with a really shallow point angle so it doesn't penetrate through the second panel. Heaps quicker and easier and lasts much longer. Then you just re-sharpen when you need to. Cheaper too.

Madmorrie


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PostPosted: Sun Dec 04, 2011 4:47 pm 
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Location: Goulburn NSW
Thanks Guys,

I've had trouble deciding between the two.

I might have a crack with the shallow drillbit type.

Ian

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 Post subject:
PostPosted: Sun Dec 04, 2011 4:52 pm 
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Joined: Thu Jun 17, 2010 8:55 pm
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Location: Central West
madmorrie wrote:
Lately I have just been using a drill bit, about 8mm, sharpened with a really shallow point angle so it doesn't penetrate through the second panel. Heaps quicker and easier and lasts much longer. Then you just re-sharpen when you need to. Cheaper too.

Madmorrie


I normally sharpen one up also, similar to a sheet metal drill. You can also have a range of drill sizes then too.

If you know a toolmaker or someone good at sharpening drills maybe they can sharpen for you?

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PostPosted: Mon Dec 05, 2011 8:38 pm 
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Joined: Tue Feb 24, 2009 1:57 pm
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IAN.
There are several methods as aove, which are excelent if you need to save the panel.

If your going to replace the panel with new, then I find its fairly easy to grab a small grinder, and with the tip of the wheel, I grind into the "spot". The top sheet (around the spot) sits up about 1/2 mm and this weakens it enough to rock n roll off. As I said, its quick but destroys the old panel.

Alex.


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