I’m drilling 6mm holes in 12mmMDF using the stock spindle running at 5000rpm. I’m using Chip Breaking Partial Retract drilling.
The drill bit rattles in the hole and I’m wondering if the bearings in my spindle are shot. This is a short video with sound of the 6mm drill operation. It’s a new drill professionally sharpened.
VideoOut.avi (2.9 MB)