SI
SI
discoversearch

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor.  We ask that you disable ad blocking while on Silicon Investor in the best interests of our community.  If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.
Gold/Mining/Energy : Gold and Silver Juniors, Mid-tiers and Producers -- Ignore unavailable to you. Want to Upgrade?


To: hank2010 who wrote (37913)4/10/2007 12:33:51 AM
From: heinz44  Respond to of 78419
 
If it ain't Fagersta or Sandvik.....obviously you havnt heard of Beltzer.....used only vanadium ,mucho $$ro



To: hank2010 who wrote (37913)4/10/2007 4:15:05 AM
From: E. Charters  Read Replies (1) | Respond to 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<:-}