Slapstick
Cast Iron
- Joined
- Nov 4, 2004
- Location
- Ontario Canada
I've used long series end mills from time to time and it seems that no matter what unless you REALLY slow them down, they will chatter on you. I've had to slow down long series carbide end mills to speeds i would use for an HSS cutter just to get them to stop chattering... seems almost non productive in a way...
for instance i had to slow down a .1875 carbide long series end mill to about 800 - 1000 rpm in aluminum, in order to get a decent finish, and i was only milling 1/2" deep skimming off a few thou for a cleanup. (i needed the long series to reach down to what i was machining... had there been nothing in my way i could have used a regular length for that 1/2" doc). I had it choked up pretty well so that it was almost only the flutes sticking out from my collet.
I've also found the only luck is to climb cut at a fairly aggressive feed and you can not re-run over your cut without taking more depth, or it will chatter.
Is there a seceret to making use of them as you can an ordinary length end mill? it seems like almost anything longer than "regular length" gets this problem no matter what diameter either.
for instance i had to slow down a .1875 carbide long series end mill to about 800 - 1000 rpm in aluminum, in order to get a decent finish, and i was only milling 1/2" deep skimming off a few thou for a cleanup. (i needed the long series to reach down to what i was machining... had there been nothing in my way i could have used a regular length for that 1/2" doc). I had it choked up pretty well so that it was almost only the flutes sticking out from my collet.
I've also found the only luck is to climb cut at a fairly aggressive feed and you can not re-run over your cut without taking more depth, or it will chatter.
Is there a seceret to making use of them as you can an ordinary length end mill? it seems like almost anything longer than "regular length" gets this problem no matter what diameter either.