You want to know all about photo encaustic. You love photography and want to put more of yourself into your work. You want to have fun exploring your images while being more hands-on. I love that too. That is what drew me to photo encaustic. That and the way the light pulls me into the image.
I would like to know why 118 degrees made the standard tip angle for a drill bit.Or for that matter, 135 degrees? 1. Is there anything called standard tip angle? 2. What factors determine the choice of the tip angle? P.S: I posted the same question in Aerospace forum : http://www.eng-tips.com/viewthread.cfm?qid=347077
Best Answer: This depends on the hardness of the steel in question. Ordinary twist drill bits are only about 65 rockwell C. (Nearly all steel bits are high-speed steels these days.) Hence they simply will not work on the hardest tool steels, and will wear very quickly on medium-hardness, high strength steels.