I found the aliexpress and Amazon endmills are just the budget ones. I pay the same price for Chinese cutters that are so much better. You need to go to a factory I found.. Aliexpress sellers are actually putting a premium on things as hard as that is to believe.
And you don't have to use high rpm. Just hack with them like you normally do. Only now rpm doesn't matter so much The cutter doesn't care. It's more what the machine can handle On Wed, Feb 19, 2020, 7:26 PM John Dammeyer <[email protected]> wrote: > Amazon.ca has a set of 5 carbide 6mm for $34.29 Cdn. I imagine that $6.85 > each isn't too high a price? > > https://www.amazon.ca/4-Flute-Tungsten-Carbide-Milling-Diameter/dp/B07B9PRNWC/ref=sr_1_8?keywords=carbide+end+mill+1%2F4&qid=1582092811&sr=8-8 > John > > > > -----Original Message----- > > From: andrew beck [mailto:[email protected]] > > Sent: February-18-20 9:50 PM > > To: Enhanced Machine Controller (EMC) > > Subject: Re: [Emc-users] Feeds and speeds > > > > You guys all probably know this but I'll say it anyway.. You should > start > > using carbide endmills. I run a tooling company here in New Zealand > > selling to the local machine shops. Carbide is awesome. Anyway I have a > > couple of Chinese suppliers I buy my stuff from and a Taiwanese supplier > > for higher quality stuff. Shout out if you want to find some suppliers > and > > I'll connect you up. > > > > On Wed, Feb 19, 2020, 5:12 PM Jon Elson <[email protected]> wrote: > > > > > On 02/18/2020 08:45 PM, John Dammeyer wrote: > > > > I've got Mecsoft AlibreCAM generating the tool paths for this in the > > > attached photo. It's Cold Rolled steel 3/16" thick. I'm using a 1/4" > HSS > > > end mill. I'm trying to figure out, using Machinists tool box, exactly > > > what feeds and speeds could be used for milling the slot. > > > > > > > > I was thinking 30 SFM and with a 4 flute end mill doing 0.003" per > flute > > > the toolbox comes out with 460RPM, 5.5ipm for S460 and F5.5 and 10% of > > > tool diameter for depth per pass so 0.025" > > > > > > > > Is that too conservative or likely to break something? Doing it > > > manually I'd do it by feel but once it's automatic it's harder to > decide > > > SFM and chip load. > > > > > > > Those numbers sound mostly OK to me. But, I LONG AGO gave > > > up plain HSS, the tool life was just awful. > > > I learned on a box of P&W Stellite tools and got spoiled. > > > When I finally wore them out, I started using > > > M42 and M57 cutters, which have at least 3X the tool life. > > > I'm showing 60-80 SFPM so that would be more > > > like 900-1000 RPM, but coolant would be required. And, I > > > usually plunge about 1/2 the cutter diameter > > > per pass. It all depends on the stiffness of your machine > > > how much of a cut it can handle. > > > > > > Jon > > > > > > > > > _______________________________________________ > > > Emc-users mailing list > > > [email protected] > > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > > > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
