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Gold/Mining/Energy : Precious and Base Metal Investing -- Ignore unavailable to you. Want to Upgrade?

To: E. Charters who wrote (25963)	12/26/2003 11:35:02 AM
From: hank2010	Read Replies (2) \| Respond to of 39344

"Drill it for water hole" !!! You are sucking wind again, pardner. The "water hole" or flushing hole is not drilled! One uses a clay or ceramic core and rolls the steel around this core. Fagersta is a city in Sweden. The Fagersta company is a Swedish company and made their steel in Sweden. They were the ones who developed the use of cemented carbide in drill bits in the late 40's. Fagersta amalgamated with Secoroc about 20 years ago and Secoroc was bot by Atlas Copco about 10 years ago. Noranda does not own them. Are you confusing Fagersta with Fahralloy or Fahramet which was owned by Falconbridge. I am a British citizen, but would never buy British drill steel. It is my understanding that drill-steel companies use electric furnaces for their hardening/tempering proceedures. They all keep their procedures secret from their trade competitors. It takes a lot longer than salt or nitride but gives superior results. One wants hardening on the outside to resist abrasion but you need the toughness throughout the cross section to prevent breakage. Microscopic cracks on the skin will propagate under continuous impact and result in a fracture. I would never have NRT threads on my drill steel. Use the modern T-38 T45 or T51 threads, depending on the hole diameter you are drilling. Rattle that drilll string once and all the threads break loose so that they can be undone by hand. None of that old-fashioned time-consuming hammering with sledge hammer and fighting with wrenches. "with a helper holding the steel for starting"!!! What kinda miners do you hang with? Down here both of you and your company would be charged by the federal MSHA inspector for that kind of practice. I suspect that the Ontario Min of Labour rep would do the same!