I've used both.
I can't say for sure which one has more torque: the grinder works very well at low RPMs though. A grinder can vibrate quite severely though, which will make it hard to use for detail work. I know my hand was numb after a straight hour of using it. I'd like to blame an unbalanced bit, but that just wasn't the case.
I've also used the extension for a Dremel, and it's really nice. I'm just not sure how long it would last, under heavy use though.
Brian, you might try spec'ing out that spring from McMaster's inventory. It can't be that hard to find.
BTW, if any fellow RC'ers have any tips for these springs, I need one for my boat! Miniature universal joints just aren't easy to find!
|