- Mar 5, 2018
I posted before about good uses of harbor freight circ saw blade sharpener, but I found an extra use I thought might be worthy, you can split twist drill point grinding against the wrong side of the blade, spinning dust in your face. It ain't much of it though I wore safety glasses and didn't feel any grit on my face thanks to diamond blades. Just grab a fresh large bit and sort of try that split point back grind or whatever the right name is against the disk until it fits. I had good results with 5/8", 1/2" and even smaller bits. I don't think I'm gonna be predrillin for 5/8 and less unless it's a critical hole.