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Discussion Starter · #1 ·
Hello,

Is there any benefit to drill bits for metal & wood having a coating? I want bits that stay sharp for a while, I do have a drill doctor. I see bits with Tin coating, cobalt coating, titanium coating etc. Do these coatings help, or are they just a gimmick?

Are there manufactures of quality drill bits ,if so, who do you recommend? Thanks Much


Joe
 

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The way I Understand it is the TiN coating is supposed to improve edge retention. My Guess is that they use it on the "cheaper" tool steels..... I've seen some better edge holding with the coating, but it is where it wears first. a Good set of Cobalt drills will last longer IMHO
 

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I have never seen any diff in regular or tin coated lasting any longer and for the cost you can almost just get 2 regular bit:blink:
 
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