For small details like that, scale the model up by a factor of 100 or 1000. This will help prevent the missing faces. Another approach to putting the bevels on would be to draw a cone at the sharpening angle and intersect it with the drill. [image: IXqq_drill.png] For something like this model, I find it helpful to think in terms of how the bevel would be put on the real object. For a drill you would do that with a grinder and rotate the drill rod. The surface of the cone represents the contact line between the wheel and the drill.

@Gaieus Thanks! Very powerfull tool. First, i have some trouble but when i find context menu, everything it's ok! Thanks again!

Thanks! Seem to work. Yes, need to be scaled up but it's ok. Thanks again!