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yel-mel Samba Member
Joined: May 07, 2015 Posts: 421 Location: Tampa Florida
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Posted: Tue Nov 29, 2022 12:08 pm Post subject: Best spot weld drill ? |
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What is the best spot weld remover / drill bit in everyone's opinion.
The hardest part for me is finding factory spot welds to begin with. |
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esde Samba Member
Joined: October 20, 2007 Posts: 5927 Location: central rust belt
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Posted: Tue Nov 29, 2022 2:10 pm Post subject: Re: Best spot weld drill ? |
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I prefer these
https://ustoolhub.com/alfa-tools-i-8mm-cobalt-spot...mmEALw_wcB
They’re much easier to control than the mini hole saw cutter _________________ modok wrote:
Bent cranks are silent but gather no moss. I mean, ah, something like that. |
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67ctbug Samba Member
Joined: January 24, 2016 Posts: 3619 Location: CT
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Posted: Tue Nov 29, 2022 3:33 pm Post subject: Re: Best spot weld drill ? |
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I agree, I usually start with a 1/8" pilot dimple or hole too. _________________ '67 Beetle L41
'74 Westfalia
'69 Plymouth "Adam-12"
'63 Ragtop
'73 914
'73 Dodge W200
'72 Dodge Wrecker
Go Cubs!
World Series Champions 2016
KentPS wrote: |
...or the PO envied the terrorists' bus in "Back to the Future". |
mukluk wrote: |
He's fine, just waiting for the dragon in winklepickers to move out of his lane. |
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VW_Jimbo Samba Member
Joined: May 22, 2016 Posts: 9879 Location: Huntington Beach, CA
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Posted: Tue Nov 29, 2022 7:28 pm Post subject: Re: Best spot weld drill ? |
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I prefer 3/16 inch standard drill bits. Easy to get, cuts a nice hole for plug welding when sticking it all back together, and my Clecos are 3/16”!
As for finding spot welds. I use a piece of 120 grit sandpaper to clean everything up. Most of the time the weld edge shows where the center is. But every once in a while it does not. So, in those moments I use my fingertips. _________________ Jimbo
There is never enough time to do it right the first time, but all the time necessary the second time!
TDCTDI wrote: |
Basically, a whole bunch of fuckery to achieve a look. |
67rustavenger wrote: |
GFY's Xevin and VW_Jimbo! |
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scrivyscriv Samba Electrician
Joined: October 04, 2011 Posts: 2918 Location: Memphis
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Posted: Tue Nov 29, 2022 9:51 pm Post subject: Re: Best spot weld drill ? |
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I've used several different types, including the blair drill, cheap HF hole saw drill, standard jobber bit, etc.. The very best way I found is a 1/4" carbide rotary file in a die grinder.
Link
_________________ Robert in Memphis
Dünkelgrügen 1967 Java Green bug thread
Engine rebuild thread
If you're ever in the Memphis area, you are welcome to stop by for advice and help. |
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evanfrucht Samba Member
Joined: July 24, 2016 Posts: 2180 Location: Laurel Canyon, CA
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Posted: Thu Dec 01, 2022 1:31 pm Post subject: Re: Best spot weld drill ? |
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All good tips. My preferred method involves starting with a stubby 1/8 drill and then going thru with progressively larger COBALT drill bits. The cobalt drill bits are really the key. Sometimes I'll use a center drill too. A good rounded carbide cutter works well but I usually still like to drill a pilot hole, helps to keep the bit from wandering, better weld penetration when fitting new panel, etc.
Sometimes I don't even drill out the spot welds if I can, just slice the flange or lip up with a cutoff disk and smooth out what's left.
Look for a slight dimple that's where the spot welds are. Thick paint, sealer will hide it. Hit it with a roloc disc quickly and it will reveal those low spots/dimples. _________________ 1967 Bug ( the daily rod )
1964 Fury Wagon ( the pavement shredder ) |
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clockworkbox Samba Member
Joined: July 12, 2020 Posts: 253 Location: Williamsport, PA
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Posted: Mon Jan 16, 2023 12:01 pm Post subject: Re: Best spot weld drill ? |
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I use these with good results. Center punch and then drill.
_________________ '69 Beetle (pieces)
Learning the hard way is still learning... |
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Onceler Samba Member
Joined: May 28, 2010 Posts: 1646 Location: Indiana
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Posted: Mon Jan 16, 2023 8:13 pm Post subject: Re: Best spot weld drill ? |
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I buy the cheapie harbor freight ones five at a time. You can flip the cutter over so it’s like having 10. But usually just use the grinder or air chisel. _________________ 1972 Karmann Ghia |
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