Posted 18 April 2009 - 05:31 PM
[quote name='shadetreemech']By the way, the Titanium Nitride modification was developed by the USSR a couple of decades ago.[/quote]
I love learning little factoids like that, thanks for sharing!
[quote name='shadetreemech'] Stainless is also hard to drill, and cobalt is the best for stainless. Cobalt is the real thing.[/quote]
Yeah, stainless is funny stuff. The desired feed is surprisingly fast and the speed slow due to the tendency of stainless to work-harden while being machined so it's hard to get that right when you're drilling by hand. [/QUOTE]
[quote name='coldfusion21'] I would buy a nice set from a reputable machine tool retailer. ENCO is a popular one, they are connected to MSC and generally have a good monthly sale flyer with some kind of drill sets.[/QUOTE]
+1 MSC generally carries a mixed bag but, in my opinion, what sets them apart from Mcmaster is that they list in their catalog if the item is USA made or an import and in most cases will give you the brand name of what you're buying. MSC also has a much superior knowledge base about their products. they will even contact the manufacturer on conference call if they can't answer your question. McMaster generally caries quality stuff, but you don't really know until you get it. And as coldfusion21 mentioned, MSC has awesome sales regularly.