workinforwood
Member
Maybe my 7mm brad bit is warped a bit at the end? Drilled a few acrylics and find the hole is sloppy at the top to about half way down, but close to the bottom it is sweet. That's not good, especially with a slim, because there isn't much meat left on the tube when a pen is finished so if there's a gap, it can be exposed or even blow out. I'll re-drill the tubes with a bigger bit and use them on a bigger kit, so they aren't gone, but am curious if ya'll think the bit when a bit warped at the end, or maybe something else is causing the problem? Visually looking at the bit spinning, it does kinda look like the end of the bit wobbles a teeny tiny bit, but kinda hard to say for sure. Tried laying it on a flat surface and rolling it to see, but that's a tough test too, because there are small burrs on the shank of the bit caused by the chuck jaws no doubt.