I've long gone off HSS as Carbide is so cheap from China. Starting point - 4 Flute - 1000 rpm - 100 mm min and cut in 2 passes. 65 m/min, 0.025 mm per tooth. All depends on machine rigidity.
For HSS maybe 1/2, 500 rpm and 50 mm min. This is where I like my hand wheels, I can feel the cut pressure. -- Thanking you Wallace Weideman Marshland Engineering 704 Marshland Road Styx Christchurch 03 3237449 www.marshland.co.nz On 19/02/2020 at 3:45 p.m., [email protected] wrote: >Send Emc-users mailing list submissions to > [email protected] > >To subscribe or unsubscribe via the World Wide Web, visit > https://lists.sourceforge.net/lists/listinfo/emc-users >or, via email, send a message with subject or body 'help' to > [email protected] > >You can reach the person managing the list at > [email protected] > >When replying, please edit your Subject line so it is more specific >than "Re: Contents of Emc-users digest..." > > >Today's Topics: > > 1. Feeds and speeds (John Dammeyer) > > >---------------------------------------------------------------------- > >Message: 1 >Date: Tue, 18 Feb 2020 18:45:21 -0800 >From: "John Dammeyer" <[email protected]> >To: "'Enhanced Machine Controller \(EMC\)'" > <[email protected]> >Subject: [Emc-users] Feeds and speeds >Message-ID: <[email protected]> >Content-Type: text/plain; charset="utf-8" > >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. > > > >Thanks >John > > >-------------- next part -------------- >A non-text attachment was scrubbed... >Name: image001.png >Type: image/png >Size: 29705 bytes >Desc: not available > >------------------------------ > > > >------------------------------ > >Subject: Digest Footer > >_______________________________________________ >Emc-users mailing list >[email protected] >https://lists.sourceforge.net/lists/listinfo/emc-users > > >------------------------------ > >End of Emc-users Digest, Vol 166, Issue 90 >****************************************** _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
