[Jeff in Pa]

I was machining some 5" square steel tube at work today and was drilling a 7/16" entrance hole for an endmill using a carbide drill. The drill was spinning at 3000 rpm and being fed at 15" a minute. ( .005 per rev )

It takes less than two seconds for it to drill thru the 3/16" steel thickness.

The chip came off the drill and hit me across the face. I had a coolant mark across my right lense of my safety glasses ( regular glasses in pic ) and got a cut over a 1/4" long on my nose.

Just another "character mark" for me but just shows why proper eyewear is extremely important.