Which factory? > -----Original Message----- > From: andrew beck [mailto:[email protected]] > Sent: February-18-20 11:46 PM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] Feeds and speeds > > 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
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