On 8 Oct 2006 21:12:25 -0700, "Robatoy" wrote:

I am in need of a few sizes of flat-bottomed holes.

The difference between HCS and HSS is well established, and worth the
extra few bucks to go to HSS.
But what about carbide?
Any sets you guys like? ( 1/4 - 1" in 1/8 increments would be fine.)
Lee Valley has a nice set.
Any other suggestions?

Thanks in advance

r

I'd recommend carbide Forstners. I've got plenty of HSS Forstners,
but tend to heat up and in one case blued, resulting in no sharpness
at all. D*mn! That's when I learned about the carbide tipped ones.
That carbide replacement stays sharp. Well, as sharp as carbide gets.
I'm not sure, but it seems a little more heat resistant too.