Re: drill bits

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Posted by Tim Daley(MI) on December 22, 2018 at 13:37:42 [URL] [DELETE] :

In Reply to: drill bits posted by Al in texas on December 22, 2018 at 12:44:08:

he Industrial Tool supply houses will stock quality tools -try MSC. The bargain house variety, cheena made crap is just that. For most applications in mild steel, non-hardened, HSS, TiN coated will work. The drill point is important too -got a good sharpening device? 118 drill point is standard. For harder materials, use a 135 Parabolic Carbide Drill. Drill/tool failure is caused by four things: 1) the wrong tool/drill itself; 2) the workpiece material; 3) the machine itself; and 4) the setup of the machine. What is your application? Are you hand drilling or using a lathe?

Tim Daley(MI)

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