April 19, 2016
Today I installed five clocks, four were on cinder block wall. Using small platic anchors, and a 1/36 masonary bit in a high speed hammer drill.
What I noticed, after about 1/8 or so into the wall, the bit progress was a bit faster. Took a lot of work to get the first 1/4 inch or so.
Are the surfaces of cement harder? Or does the tip of the bit heat up and work better when it's hot?