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Started de-tabbing my GS450 frame using a hacksaw and a die grinder. What are the tips to getting the welds ground down clean and smooth? Seems like I now have a de-tabbed rough spot from the grinder. Looks great from 10 feet away, but i was hoping for something much cleaner.
That is not a die grinder.
Use the smoothest/finest grit wheel you can.
And only on anything above base metal( the frame tube ).
Take your time and leave about 1/16 in. sticking out then switch to a fine tooth file.
These frames are made of thin low carbon steel, no need to attack it aggressively.
The welds on these old bikes are not the best in most cases. They're crude machine welds. What Nebr was trying to tell you was that you need to be careful not to remove too much material. The welds dont always penetrate into the base material very deeply. If you remove all of the weld at tje surface you weaken the weld as a whole.
Of course that only applies if the tab is at a joint In tjw actual frame tubes. If not, as Nebr says, hand finish. If you remove a hair too much a tiny bit of body filler goes a long way to smooth scratches.
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