Hot-selling attractive STEEL RING Supply to Greece

I disabled comments on this video because I kept getting the same stupid comments over and over from clueless people.

Following the copious number of suggestions from the gallery on reducing the speed while drilling hardened steel, I tried it out. I also tried drilling at high speed to compare.
Based on the limited data collected from these tests, I’d say that drilling at a moderate speed and lubricating yields the best results.

I turned comments off on this video because it was getting too many from people that did not watch the first video and are completely clueless as to what I was doing here.

You can help to support high quality projects and videos on this channel with Patreon: https://www.patreon.com/user?u=865843&ty=h

Tough Friends – 1930′s – steel and steel alloys make the modern automobile safe and durable. The “Tough Friends” are the alloy elements added to steel to give it special properties: chromium for hardness, chromium and nickel for tensile strength, silicon and chromium for heat resistance, nickel and The “Tough Friends” are the various alloying elements that when added to steel give it special properties: chromium for hardness, chromium and nickel for tensile strength, silicon and chromium for heat resistance, nickel and molybdenum for fatigue resistance, manganese and silicon for elasticity. How iron is made into steel, and then used to make Chevrolets.