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Originally Posted by bigben2k
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!
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Thanks for the info on the die grinder, BigBen2K. I'll probably try it out in the next couple of weeks. I'm trying to focus on techniques that I know will work, though, as I've had some disastrous results going off of my beaten path. For example, I tried to use aluminum flashing for a duct. Baaaaad results. It looked like a 5-year-old made it. An autistic 5-year-old. With palsy.
So, I'm sticking with known construction techniques until I can GET IT DONE. I'm impatient to start using it.
As for the spring.... time is money. I dumped the old dremel into the trash (it was actually a black and decker) and got a new one that was on sale for $29.95. Besides, the chuck (collet actually) was getting worn and the motor was old and starting to heat up a LOT anytime I used it (I suspect the insulation on the windings was getting to be way over temp spec).