On Sat, 28 Feb 2009 13:19:32 -0600, spaco
wrote:

Have you used them for deep holes?
I have a couple of intermittent jobs where I have to make 1 3/8"
diameter, 1 1/2" deep holes in mild steel. I have been using better
quality holes saws, but they only last for about a dozen or two holes.
They cost under $20 each. Would I be better off with and 80 or 90
dollar annualar cutter? I know guys who use them for thinner work, and
they work well there.

Pete Stanaitis
---------------------

Stupendous Man wrote:
They work well in a mill for partial holes, but everything has to be rigid.
========
What are you using to drive the holesaws? One trick on hole saws
is to drill a hole or several holes just inside the finished
diameter so the swarf has somewhere to go. Easy to do on a mill,
less easy on a drill press. Also what coolant are you using?

For what looks like a better price on an annular cutter see
http://www.drillsandcutters.com/hssanho1dia224.html [60$]
http://www.ameritradeco.com/page/961257 [75$]

Also if this is not a high volume job how about a silver and
demming drill? You would have to change tools several times, but
this could be less cost. [c.28$]
see
http://www.wttool.com/product-exec/p...ill_WT_Import_


Unka' George [George McDuffee]
-------------------------------------------
He that will not apply new remedies,
must expect new evils:
for Time is the greatest innovator: and
if Time, of course, alter things to the worse,
and wisdom and counsel shall not alter them to the better,
what shall be the end?

Francis Bacon (1561-1626), English philosopher, essayist, statesman.
Essays, "Of Innovations" (1597-1625).