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
