On 8/15/22 10:38, Leonardo Marsaglia wrote:
Hi guys, I hope you are doing well
I need to make some slots on a rotor I'm building and I would like to know
what do you think about fly cutting the slots with one tool only with
reduced feed off course.
The slots are 45 mm deep and 6 mm wide, the rotor is made of 4140 steel (I
attached a basic picture of the rotor). I could purchase the hss disk
cutter off course, but if I can get away with welding and grinding my own
tool it would be great because those cutters aren't cheap and I'll be only
using it for this job only.
The problem is, I'm afraid the carbide cutter will break soon making all
this process a waste of time.
What do you think?
Looks like a job for a horizontal mill, with a small cemented carbide
tipped saw blade, resharpened
before it ever sees the 4140 until it can shave your arm clean. Cemented
carbide does
not come sharp, and you need sharp. Slow feed, flood cooling to flush
the chips away quickly.
Use fine diamond coated wheel to sharpen it if carbide, or maybe CBN.
CBN is the only thing
to use on HSS as it destroys diamond, but no carbon in Cubic Boron Nitride.
CBN is ohmygawd expensive but works great on HSS. I have 2 of 3 disks I
bought from
a small shop in Colorado, 2000 grit, 2" in diameter, 30 thou thick, just
shy of $300 USD for 3.
I finally found an arbor that runs them pretty true, and at 15k revs in
my 6040 mill, I can
bring it to a piece of HSS, can't hear it touching, but a strong light
will show HSS dust drifting
away on the air currents. Sweep it across the HSS and note a mirror finish.
Shape the HSS with it and you'll be amazed at how sharp it is. And at
2000 grit, there is no
ragged wire edge to break off and quickly dull the tool. With truly
clean 4140, no rust allowed,
its worth a try.
Take care & stay well. Leonardo.
Thanks as always for your help!
Leonardo
_______________________________________________
Emc-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/emc-users
Cheers, Gene Heskett.
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
- Louis D. Brandeis
Genes Web page <http://geneslinuxbox.net:6309/>
_______________________________________________
Emc-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/emc-users
