Spotweld - Removing.

[neo]

Is anyone here a panel beater?

So what’s the best method of separating 2 pieces of steel that are spot welded together?

I want to keep the lower piece as it is, top one can sustain some damage.. I don’t like the idea of grinding off the top one, I thought there must be some special drill bit that effectively scribes out the top piece around the weld?..

Suggestions and comments please.

Cheers

[Titties]

dont you get a zero degree drill bit and drill out the spot weld. if you do it properly it will leave a hole in the top layer without damaging the lower layer.

Cheers, Mike

[l1ttle_d3vil]

yeah the most common way ive heard of is drilling them out...

[neo]

Google for the win...

http://www.wurth.co.nz/site/media/pdf/bodywork/A_03_0249_-_0250.pdf

[Truenotch]

Just go to your local tool shop / engineering shop and ask for a spot weld drill, probably 8mm will be what you want.

[Crucible]

yeah buy a spot weld drill bit as suggested, they sorta look like a Wood hole saw but on a smaller scale.

[fuel]

I've been wanting to do the same thing, although I didn't mind if a hole went through the second layer of metal too.

I went looking for a spot weld drill at tool places, price was around $20 just for the drill bit

anyone know where you can get them quite cheap?

[Bling]

if you don't care about the 2nd layer of metal just use a normal drill bit

[Jdawg]

I've been wanting to do the same thing, although I didn't mind if a hole went through the second layer of metal too.

I went looking for a spot weld drill at tool places, price was around $20 just for the drill bit

anyone know where you can get them quite cheap?

That is quite cheap. If you find them any cheaper don't expect them to last very long.

[RS13]

To drill through a single layer of sheet, we make a couple of sheet metal (zero angle) drill bits out of normal drill bits of the same size, say 10mm.

You use the first bit (with the angle spigot) to start the hole, and make a 10mm circular recess halfway through the sheet.



Then with the second bit, you grind off the spigot and even slightly "dish" the cutting faces, then drill to the second layer.



And then just work them apart. Its' a pretty time consuming way of doing it, but it'd be a damn sight cheaper. If you don't know how to grind out a normal drill to sheetmetal-spec, any decent engineer could do it easily.

[Truenotch]

Just buy a spot weld drill. Last one I sold was $15 retail from memory, and was good quality.

PM me if you'd like me to sort one, otherwise just go into your local tool shop and get them to find either a Bordo or Sutton spot drill for you. They are reasonable on price.

[evil_si]

To drill through a single layer of sheet, we make a couple of sheet metal (zero angle) drill bits out of normal drill bits of the same size, say 10mm.

You use the first bit (with the angle spigot) to start the hole, and make a 10mm circular recess halfway through the sheet.

Then with the second bit, you grind off the spigot and even slightly "dish" the cutting faces, then drill to the second layer.
And then just work them apart. Its' a pretty time consuming way of doing it, but it'd be a damn sight cheaper. If you don't know how to grind out a normal drill to sheetmetal-spec, any decent engineer could do it easily.

IMO that sounds like a fu*k load of work and time

id much rather spend the $20 and get the right tool that will do it in no time,

[neo]

IMO that sounds like a fu*k load of work and time

id much rather spend the $20 and get the right tool that will do it in no time,

The spot weld drill bit's that I got off Worth look like the drill bit used in part one.

The concave bit is what I was initially trying to find

[RS13]

The concave bit is what I was initially trying to find

Pays to have both, without drilling a pilot hole for the concave bit, its' near impossible to stop it wandering all over the place, lol.

IMO that sounds like a fu*k load of work and time

Yeah, but you only use a couple of $2 drill bits, and it doesn't take THAT long. Plus you can keep sharpening them, and you get a good result.