Drilling Spot Welds, What do you use? |
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Drilling Spot Welds, What do you use? |
obscurity |
Apr 15 2010, 08:09 AM
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#1
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Member Group: Members Posts: 411 Joined: 24-February 06 From: Atlanta ,GA Member No.: 5,628 Region Association: South East States |
I have been drilling spot welds as I work on my car and it occured to me that there may be a better way (or maybe I am being to picky). I am curious what everyone else uses.
I have been using a spot weld cutter. It looks like a short drill bit with a pilot point and little cutters along the edge. It will cut through the top layer or steel but not the back layer (usually). They will cut about 10 welds before being hoplessly dull. When I was buying them at $5/bit it was fine but that company went out of business and the ones I find now are $25/bit. Are these the right tools to use or should I be just using a drill bit allthe way through the weld. Any help or tool suggestions would be appreciated. (IMG:style_emoticons/default/smile.gif) Thanks, John W. |
strawman |
Apr 15 2010, 11:05 AM
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#2
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Senior Member Group: Members Posts: 885 Joined: 25-January 08 From: Los Osos, CA Member No.: 8,624 Region Association: Central California |
If you're going to be tossing the piece you're removing, just grind down the spot in the outer/upper metal piece and then use a cold chisel to knock it loose -- much faster than a spot weld cutter. I use a round-head bit in an air die grinder.
If you plan to re-use the piece you're removing, then using a good quality spot welder cutter is essential. I used to use the el cheapo Harbor Freight ones, but they seem to be made out of powdered iron and break at the most inopportune times. Regardless of the cutter you end up using, I'll echo the advice above about drilling a small pilot indentation and spinning the cutter at a relatively slow speed. Best of luck! |
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