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Gold/Mining/Energy : Gold and Silver Juniors, Mid-tiers and Producers
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To: hank2010 who wrote (37913)4/10/2007 4:15:05 AM
From: E. Charters  Read Replies (1) of 78419
 
Ajax (from the UK) was the premier brand for ages. It would outlast a "Fag" steel 10 to one. The reason is Fagersta made steel for Noranda being owned by them, so much of its market was captive. Ajax was far more expensive so could not compete and had no advertising. Most people would not think in terms of using 1/3 the number of drill steels for plugger, jackleg, or stoper work, even jumbo, and air trac thus saving money. They would not believe you would not have to change out steel regularly when working, lest it broke. Basically most mine buyers gave into Cadillacs and whiskey and if you did not pay the ola, you did not penetrate the market. Ajax steel, which was 54-56 Rockwell salt-bath hardened Monarch, would drill all day on the same steel and not break. I would not try that with Fag steel as it would break from heat fatigue after a few holes. If I were starting a hole for a driller on a jackleg, no way I would hold it if I knew it were Fagersta steel. I once designed a sampling drill which was driven by a CP14-RR (rotary) chipping hammer. ( aout 25 CFM at 1400 BPM) It had to use the same steel with a carbide insert for sampling, or let's say it was preferrable not to have to change out the steel, just the bit. If you used ordinary drill steel, after a few hours the steel would break. Not desirable. Monarch won't break after months of drilling on the same steel.

EC<:-}
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