Rotary tool

Have any of you guys used a Foredom Micromotor http://www.rjsintl.com/productDetails.asp?product_id=S516 which has speeds up to 45,000 rpm and a Foredom CC series motor http://www.monsterslayer.com/Foredom/Foredom.htm (the top one). I'm asking this because my dad makes jewerly and has these two motors and I see cutting disks, buffering disks, polishing disks, drill bits, etc. I'm wondering if I can use these two for modeling like cutting for example.

45,000 rpm is WAY too fast for use modelling, I use rotary tools all the time and even at 5000 rpm they can build up enough heat to melt the plastic and create more problems than good.

speed is nothing.

I had a crappy one what made 15 000RPM, but it has no force at all. Can't barely cut plastic.
the one I have now is a 8 000RPM, and is much more powerfull

I've actually used both. The Micromotor is a magnificent tool- I imagine it would meet any needs in plastic modeling you would ever likely have- it's smooth, balanced and powerful- but there are may other tools, such as made by Dremel, that will do the job just as wll, but much cheaper.

Flex shaft tools, on the other hand are, as a rule, MUCH too large and powerful for use in plastic modeling. It would be a bit like trying to do body work on a model with a chainsaw. They're terrific for wood carving.

I use a dremel (5 000, 35 000 rpm) i dont think ive ever used it on at 35 000, thats too fast for models, id say if you can adjust the speed its good. also i wouldn't suggest buffing with it, even just at mid range mine will melt right through the plastic with the buffing tool.....so i dont even mess with it, just by hand.

Well the mirco motor has speed contol (the top speed is 45,000 rpm) and I could use the pedal but I prefer the the speed adjustment control. Just a while ago I used the speed control on the lowest speed and it barely did anything to the plastic, then I used the pedal and it was rotating pretty fast and it turned the plastic into a glob.

I just bought a pneumatic one, 54,000RPM...but it will mainly be used for steel.

I keep my dremel at a low speed for plastics.

you know, i wonder if you put a q-tip in a dremel, or put a cotton ball on the end, could you use it to buff a model?

you know, i wonder if you put a q-tip in a dremel, or put a cotton ball on the end, could you use it to buff a model?
not realy because q-tip is to soft (handle) and it will bend as soon as you turn the drill on, but there are special polishing tools for micro drils with iron handle.

I have a Dremel rechargable I think it is called a Mighty Mite. It is 5000-10000 rpm. I am on my 2nd one only because you can buy the whole thing at Wal-Mart for about $20 and a replacement battery is $25-30.

It works just fine for models. In this case bigger is not necessarily better. Marc