Spot weld hole cutter

[bmwpower]

Need to do some body work on one of my cars...

Anyone have any experience with a spot weld hole cutter? Like this one (all the way at the bottom of the page)?

http://www.mcmaster.com/ctlg/DisplC...42997678953&ScreenWidth=1024&McMMainWidth=587

Is this the right thing to use? Do they last a long time?

Any comments greatly appreciated.

 

[Luckydevil]

here's some more... http://www.eastwood.com/shopping/se...0&attribute16=0&RS=1&keyword=spot+weld+cutter

 

[evildky]

I have used both of those got them both from eastwood, and neither work very well, the problem is that sportwelds are not prefect;y flat and smoothe and therefore when the cutting portions start to make contact on one part of the weld area it wants to move, the one with the spring loaded center works a bit better but is still a bear to deal with, there is another type I have yet to try and that is basically an air drill with a clamp that reaches around the back to keep you steady of course sometimes the clamp isn't gonna reach, spot welds ****

 

[pl_silverado]

Snap-on has they, they are made by blue point. They work fairly well, i haven't had any problems with them.

 

[Der Bugmeister]

Might be a bit late to help bmwpower, but...

I have a spring loaded center punch that I use to dimple the center of the weld, and this seems to keep the saw's point centered nicely. I've used these to do a few panel replacements and am happy with their performance...

 

[motorheadjohn]

I have had problems breaking the small hole-saw portion of the spot-weld cutters like posted above. And I haven't found a source to replace that part, have to buy a whole new bit. I usually only get 3-4 welds out of one before it breaks, and I do use cutting oil.

I bought one of the Blue Point spot-weld drills, nice but $$$, and there are only a few placed you can actually use that support that reaches around behind. If you're trying to remove a trunk floor, floor pan, frame rail, etc you have to pull the support off.

If you get the paper Snap-On catalog, you can get the replacement bit part numbers and buy just those, then use them in a regular drill to save quite a lot of money.

 

[eighthd]

mac tools has a spot weld cutter that works very good. And if it breaks he will replace it. I dont have a part number but on monday I will look in my tool box for it.

 

[red caddy]

I use the MAC tool cutter, in a high torque/low rpm (550) air drill with saw blade wax for lube. I get about 200 holes on a cutter head, less on the late model HSS panels, but I don't do much of the newer stuff. I drill a 1/8 th. pilot hole, it's a little oversize for the guide pin, but much better than trying to keep that spring loaded pin in a punch mark, and leaves a neat hole to use with Cleaco clips when fitting the new piece. RED

 

[bmwpower]

Any help is appreciated...it's still not too late. I've yet to start the project. Waiting for my garage to be finished.

Here's a picture of my damaged baby who needs a new core support welded in...among other things.

 

[Jay H 237]

I used the 3/8" spot weld bit from Eastwoods with good luck. Item # 19017.

You can see the work I did with it here.

 

[4lug39]

You should check out www.autobodytoolmart.com
Enter # 3980 or 2806. They are pricey but they will save you a ton of time and headaches.

 

[dante81_98]

you know you could just use a step bit. That is what I have always used.

Laterz
Chad