In article ,
George Max wrote:
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.


I know there's a limit, but the whole point of HSS is that it can get
hot and still keep it's temper. With good HSS the wood would start
smoking and burning before the bit would be harmed.


--
No dumb questions, just dumb answers.

Larry Wasserman - Baltimore, Maryland -