Hi guys. Sorry for the late reply and thanks to all for the answers. I'll try to answer more or less to all in one reply to keep it organized.
The rotor is 125 mm long. Cuts are about 45 mm deep. I forgot to mention that my universal mill is too small for the job so I'll be doing this on the lathe (it's heavy enough and has brass bearings with forced lube so it can handle it). So my idea is to cut the full length in one pass. My feed is going to be ridiculously slow. I'll be pumping plenty of coolant to keep it clean and cool. I finally got a HSS cutter that can do the job (2.5 mm thick). So depending on the finish I'll decide whether I go till the end with it or if I leave a few tenths of mm for fly cutting finishing with carbide. The slots will hold graphite vanes because this is for a dry vacuum pump. I thought about wire EDM but I'm afraid that would cost more than what I want to spend on this. By the way, an EDM machine is one good LCNC project and I would love to build one. There was a guy on YouTube that used his CNC converted mill to wire cut. He didn't submerge the part but rather flood it as with coolant. Thanks again guys for the help :) El mar., 16 de agosto de 2022 04:13, andrew beck <andrewbeck0...@gmail.com> escribió: > I would weld a lathe parting or grooving tool to a round shank at about the > right dia cutter > > And away you go. > > Easy > > On Tue, 16 Aug 2022, 3:23 pm Gregg Eshelman via Emc-users, < > emc-users@lists.sourceforge.net> wrote: > > > How thick is it axially? If it's pretty thin it should be sandwiched > > between two pieces of softer metal. Go slow on the feed, high on the > speed > > to make a lot of shallow passes with a slightly narrow cutter. Then use a > > full width cutter for a single full depth pass to clean up the slot > sides. > > > > I'd also make a bandsaw cut to near full depth in each slot to reduce the > > amount of material for the cutter to remove and provide a path for lube > to > > get in/out. > > > > > > On Monday, August 15, 2022 at 08:38:06 AM MDT, Leonardo Marsaglia < > > ldmarsag...@gmail.com> wrote: > > > > Hi guys, I hope you are doing well > > > > I need to make some slots on a rotor I'm building and I would like to > know > > what do you think about fly cutting the slots with one tool only with > > reduced feed off course. > > > > The slots are 45 mm deep and 6 mm wide, the rotor is made of 4140 steel > (I > > attached a basic picture of the rotor). I could purchase the hss disk > > cutter off course, but if I can get away with welding and grinding my own > > tool it would be great because those cutters aren't cheap and I'll be > only > > using it for this job only. > > > > The problem is, I'm afraid the carbide cutter will break soon making all > > this process a waste of time. > > > > What do you think? > > > > > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
