I got tired of wearing out dremel tools, so i thought id try the Milwaukee cordless one since it was 129 at home depot and came with the charger, a 2ah and a 4ah battery, and sooner or later i want to get one of their m12 ratchets. I usually avoid the cordless ones but figured the m12 batreries should be ok. On fact, the do seem to be ok and have sufficient charge even on the small one. But im not particularly happy with the tool itself It overheats fairly easily, but i actually suspect thats not as big of a problem as it sounds. Ive overheated plent of dremels until they are too hot to hold and smell like burning insulation. The milwaukee just shuts down and gives an overheat warning. At first it seemed that it overheats faster than the dremel, but i think whats really going on is that it just wont get as hot and thats probably a good thing rather than a drawback. Unfortunatly, when i used it the second time, the motor would not spin up unless you gave it a kick or turned the speed all the way up and i had to exchange it. Bpth of them had a huge amount of play in the shaft. A quick google search found it was not just mine. They all have it. Im very dissapiinted in that. For many uses, it wont matter. But when you clamp it into a drill press adapter and try to drill with a 0.1mm carbide but, it probably will.
I found that the problem is that the bearing does not fit the housing properly. I took a blade for a paint scraper that was 0.375mm thick and heated it in a flame until it was red and let it cool to aneal the metal then blunted the edge on sandpaper and took a pair of snips and cut some shims for the bearing. That fixed it perfectly. No more play. Still i dint expect to have to reengineer a milwaukee too so its kind of dissapointing.
I found that the problem is that the bearing does not fit the housing properly. I took a blade for a paint scraper that was 0.375mm thick and heated it in a flame until it was red and let it cool to aneal the metal then blunted the edge on sandpaper and took a pair of snips and cut some shims for the bearing. That fixed it perfectly. No more play. Still i dint expect to have to reengineer a milwaukee too so its kind of dissapointing.