So there we have always brought the chains for grinding to the dealer and we wanted time then save the money, the machine gekauft.War since then and has been tried the same. With a little adjustment work (chain stopper, depth stop, etc. a little wobbly) the Ergenbisse were ok. So, was then six months later, a chainsaw course and since then I had to listen to what. The chains are sanded by hand, just so you get a perfect result. Conclusion: The machine is designed for the grinding of not quite as accurate (the teeth must all be the same, so you get a perfect cutting performance and she also wears when in spite of all the Calibrated ropes believes too much material from) must be well-suited. So who says he wants the best for its chain, then Saves you money and buys ne Rundfeile.Die is cheaper and the chain also holds then even longer!