Be sure to get the 3-foot-long Flex Shaft extension as well. That way, you can choose to hold it either like a pencil or a like handlebar grip, depending on the level of control you want. To me, gripping the Dremel by itself without the extension is like holding a baseball; not nearly as much control as when the extension is used.
I was doing some cutting recently. I used it without flex-shaft and could not get used to it. I am simply used to use Dremel with flex-shaft.
As for bits I also done mistake of buying some cheap stuff.
As excercise in changing bits it was good,otherwise not.Grinding wheels disintegrating,grit not holding on sanding wheels etc.
How is the handset for vibration? i was thinking of getting one as the main unit does cause a bit of numbness in the fingertips if youre using it for extended periods
I used flex-shaft before for prolonged periods of time (say 10 hours) and if I take care not to bend it too much (you do notice when it is bend too much it starts to make funny noises and vibrations too) then it was all fine. Not so much me! Dremel could go all night long, but me not so flawlessly...
If the flex shaft is bent too much while being used, it begins to slip when you press the spinning attachment (cutter wheel, cutter bit, grinder bit, whatever) in to the piece that you're working on. Solution is to minimize any bends in the flex shaft while you're working. You can hang the Dremel from above, or lay it out on a table. If you repeatedly neglect to straighten it out while you're working, the slipping gets worse each time until eventually the shaft will wear out, and then even light pressure on the workpiece will prevent the shaft from spinning, and whatever bit you are using will be motionless against the workpiece, no matter what the motor's RPMs are. In 20 years I've been thru about 3 Dremels and about 4 or 5 flex shafts, and threw them away when they became useless, but it was only when I called Dremel because I was about to throw another one out (that I had only owned for a short while) that I was informed that the tool has a lifetime warranty and they would repair it for simply the cost of postage. Same for the flex shafts, and IIRC they would just ship you a replacement cable for the shaft that would solve the slippage problem. I told the nice lady on the phone that I had been a huge fan of Dremel for about 20 years, and that it was a fantastic product, and I said I'd even wear a Dremel T-shirt and baseball cap if they sold them. She said they didn't sell T-shirts, but that she could give me one for free. I have it in storage somewhere, so I'll have to go find it.
One minor drawback of the Dremel IMHO is that there is no ON//OFF switch on the pencil grip of the flex shaft.
One thing you definitely want to be sure of is to wear goggles or safety glasses while using the cutter wheels. If you change the orientation of the cutter wheels even the slightest amount while you're working, they break and the centripetal force makes them fly apart at tremendous speed. I've not found a use for the little red ceramic cutter wheels, as they tend to break apart if you simply look at them askance, but the larger fiberglass cutter wheels are one of the best things about the Dremel. The fiberglass wheels can break also, but not as easily as the ceramic ones. In addition to wearing eye protection (and it may be obvious or even common sense to some people), make sure that you're not in the plane of the spinning tool so that if a wheel does break apart, the shrapnel doesn't hit you directly (although it sure can ricochet in any direction at that speed, so be sure to wear eye protection anyway).
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