Does anyone use an electric Die Grinder? What rpms do these see? What RPM's does a dremel see?

 

i do all the major shaping for my ports with a die grinder, but i use a sears generic rotozip for all the polishing and deburring. i suppose that's only because my air compressor runs out of air too fast (it's only a 30 gallon) and i get migrains with a 22k rpm die grinder screaming at me the whole day.



the rotozip and most of its generic counterparts are around 5 amps and operate between 20 and 30k rpm.



you can get carbide bits made for vutting alominum and other soft metals. they've got 5-6 flutes compared to the 10-16ish for thehard metal bits. those cut through aluminum like a hot knife through butter. i use them for doing throttle bodies.

 

Wow man you guys are crazy!



For work like in the picture, intake manifold, use an angle grinder with a grinding wheel(or cut off wheel if its in a harder to get to spot..) on it and then a flap wheel too smooth it all off..



Don't ***** foot around with whimpy dremels and die grinders..



Man if I took more than a couples of minutes to grind that flush at work i'd be getting a kick up the ****!

 

Dremels are for old ladys and children.



http://www.eastwoodco.com/shopping/product...d=hanging+motor



http://www.eastwoodco.com/shopping/product...keyword=carbide



http://www.eastwoodco.com/shopping/search/...0&attribute16=0

 

Is it OK to use a grinding wheel on aluminum? I've heard that the softer metal will build up in the wheel and cause an imbalance which will eventually make the wheel shatter.

 

Wow tell that person to stop smoking so much crack.



Never ever had that happen to me. But the Al does gum up the wheel a bit which stops it working so good.

Either have a bit of scrap mild steel close by that you can clean the wheel on, or Bees wax works good too.

 

It's called "galling".



eBay is probably the cheapest if you're lucky.



http://www.mcmaster.com/

...if you got the money and you need something specific.



Dremel bits are not used by professionals for this type of metal work.





-Ted

 

dont forget your typical protective items when cuttin metal...

eyewear... gloves... mask...

 

Get a good face shield and never blow the metal dust off the peice with your breath. Use something else.



Couple of months back I went to sleep after a night of porting. Woke up with a red eye. Went to the doctor and he picked at the peice of rust that was stuck to my eye, got it out and went to an eye doc the next day. He picked at my eye for 20 min. Worst ******* experience I have had in a long time.



NEways metal dust in eyes is a bad day...









GregW

 

I've bought several sets off of eBay and have been quite satisfied with them, especially for the price. Only problem I've had is one of the long shanks isn't balanced and nearly unusable.



Eastwood has a lot of hard to find stuff, but the prices for burs are outrageous. I can by a mixed set for thier one.



For cutting aluminium, use the single cut burs and lube. I use WD-40, but the beeswax sounds interesting, I'll have to try that.



When my burs just begin to gall, I take them to the bench grinder and clean them on the wire wheel. The more they gall, the harder it is to clean them, so catch them early.



Die grinder and cutoff wheel would be your best approach for what you are doing now. You should wear a respirator with the cutoff wheel due to the fine dust.