[TR] drill bits

[Michael Porter]

Gary Nafziger wrote:
> hello,
> Anyone have suggestions on where or what brand of really good drill
> bits to buy?  One's that last more than 4-5 uses?  I'm getting frustrated with
> one's i'm using.  thanks!
>
>   

One principal description seems to be the best guide--the type of steel 
used.  If the set is described as "carbon steel," they're not that 
hard.  Look for bits advertised as "HSS steel." HSS is a tool steel and 
is a good deal harder than carbon steel.
 

Any bit with titanium nitride coating will be a gold color and capable 
of lasting quite a while, but those have to be treated differently than 
other materials.  The most common mistake made with TiN-coated bits is 
not using enough pressure.  Allowing such a bit to spin work-hardens to 
material to be cut and rubs off the coating, and the bit stops cutting.


Cheers.

-- 


Michael Porter
Roswell, NM


Never let anyone drive you crazy when you know it's within walking distance....