Bests & Worsts Reviews from Amazon

Note: This is prior to any sanding, grinding, polishing, drilling, etc. So first confession is that I enjoy taking apart tools that I buy, before using them, to see what my money's worth. So bad news first right? Anything at 6 (16,000 RPM) or higher on the dial, out of 10 (32,000 RPM), I start hearing a constant high pitch noise. Now, I wore in the brushes for the motor to cancel that out as an option, so I'm gonna guess it's most likely due to one or both ball bearings. The bearings (626DSD28 - 6 mm bore, double sealed) are made in Taiwan by a Japanese owned company named NMB, and both are press fitted onto the shaft assembly. So I'm thinking if I can take them off, purchase higher quality (maybe double shielded) bearings, the high pitch may be eliminated. Second thing, not as bad.. I'm not sure how hot and how fast they apply the resin onto the motor rotor wires, but it looks like pore city. Maybe air was trying to escape in between the wires when the resin was settling in, but it looks pretty porous, so I'm not sure how long it will be until some of those wires may break. Okay, bad news over. Overall, I'm pretty impressed with the ergonomics and build integrity of this thing. For around $60, I think it's a good buy. The tool housing is made of Nylon 6 with 35% glass fiber reinforced (the good kind of plastic - strong and rigid with a hard surface) with what seems like a butene overmold. There's a fan and some ventilation openings to keep the motor cool. I ran the tool for 30 minutes straight at 6 on the dial and it was still relatively cool. A part of that 30 minutes was to wear in the brushes. The brushes seem like the carbon-graphite kind, and wear into the commutator nicely. The motor rotor was balanced as expected, and I appreciate the time Dremel took to do so. The cable is made by a Taiwanese company, Lorom. It’s 18 AWG x 2C, can handle 60 degrees Celsius and 300 V. The case the tool came with is made of high density polyethylene like most cases nowadays, but it also has some interactive features that I think are handy. I like the accessories kit it comes with, and has just about everything I think I’ll need for sanding, grinding, and polishing. From using other, more expensive Dremels and knock off brand rotary tools, I think this one will do the job where it counts! Good job making an affordable rotary tool that matches your well respected reputation, Dremel.