MMZ_TimeLord, you are exactly right, also the bit's side is making a lot of contact with the walls, which adds to the heat produced. after drilling the first 2-3 plates i discovered that when i stab the copper, the bit does not heat up and get stuck. however, with my press it is dangerous to do so. i have snapped several thinner bits like that and got bigger ones stuck. the thing is just not good in construction quality at all. would have probably worked for wood flawlessly, but copper is a diff story. what i had to do is find a balance between how hard i push on the bit, how fast i move it and how many holes i can drill at one run before taking a minute break. im not complaining though, this way i learned on a weak machine, so if i ever go to a better one i will not simply rely on the machine to do my work, but instead know how to use it to its full potential
