On Thursday, April 28, 2011 09:54:59 AM andy pugh did opine:

> I hope to machine some MDF on my milling machine this evening. I need
> to by a longer tool, and have the choice of a suitable brazed carbide
> router cutter or a HSS milling
> cutter from different shops at the same price.
> 
> Which would work best at the inadequate speed that my milling head can
> manage? Suggested spindle speed for both is rather higher than my
> machine capability.
> 
> (I am tending towards the milling cutter, as it will also work for
> other materials)

Lowes usually has a Bosch 1/4" 2 flute upcut spiral router bit in solid 
carbide that I have used several of up, and in MDF, nothing but solid 
carbide will hold an edge for long.  This bit has a 1 inch and small change 
flute length, so can be run full depth in 3/4" MDF in one pass.  And it can 
do a straight plunge too.  Unforch, at the rpms either of our machines can 
make, MDF cuts with a lot of fuzz left at the edges.  The brazed bit, not 
being as sharp, exacerbates this, a lot. :(  The HSS bit will rapidly dull 
in MDF even if originally very sharp.

It runs slightly more than a $20 bill IIRC.  There are no doubt better 
bits, but you can put one of those in hand in an hour or less depending on 
how close the nearest Lowes is.

-- 
Cheers, Gene
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
<http://tinyurl.com/ddg5bz>
<http://www.cantrip.org/gatto.html>
Where's SANDY DUNCAN?

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