That's good being able to make a spot weld cutter last that long, not me I'm hard on them and break to many. I can use a grinder faster and better. But it is all in what you get use too.
It’s just practice, like anything else. Once you get the drill speed down they’ll last a long time if you don’t side load them a ton, you get a feel for when you’re doing something that’ll break ‘em. And you can use them missing a tooth or two if you’re careful.
Might have been necessity for me though, no way I can be precise enough with a grinder to do that stuff. I’d have a whole lot of welding to do.
