Greg can you educate me on what what gear cutters are enough for most gear cutting needs? Fusion 360 has a nice gear profile generator I can use. But I'll have to model all the cutters after that I think... Thinking keep them pretty simple with no helix angle or anything. And maybe plan to cut most of it out with a endmill straight down the middle before putting the gear cutter through the cut
I will have to model this I think. Otherwise they will say it's to hard. But if I can send them the model then it's all go Regards Andrew On Fri, Jul 24, 2020, 6:43 PM Gregg Eshelman via Emc-users < [email protected]> wrote: > Gear tooth shaped end mills would be real handy in many situations, > especially where you need two different sized spur gears on one part, and > the smaller one is too close to the larger one for any conventional sort of > rotating gear tooth cutting tool. In olden times those had to be cut with a > linear tool like a shaper or vertical slotting attachment for a mill. A CNC > mill with a 4th axis can do such work with a ball end mill of diameter > smaller than the smallest width between two teeth, but it's slow, requiring > multiple passes to cut both flanks of each tooth. > > An end mill with the full profile could cut in a few straight passes and > be done. Could make a multi-diameter cluster gear from a solid piece by > turning the diameters then milling the teeth up close on each step. > > I suggest duplicating the 8 profiles that come with single tooth rotary > gear cutters. Don't leave out 14 DP (especially in 14.5 PA) and 2.5 Module. > People who work on 1940's American and 1980's Asian (especially Indian) > equipment would like those sets. > After WW2 there was apparently some consensus in the machine tool industry > that *nobody* was ever again going to use 14 DP gears. Look on any site > selling stock gears and you'll see they skip 14 DP, except one place in the > UK that claims to have them, but only in 20 PA. If you want 14 DP it's a > custom order, if they'll do it at all. Same goes for 2.5 Module. Somewhere > around the late 70's into the 80's, some Asian and Indian companies must > have decided 14 DP was ideal for some of their gears, but they had to keep > in Metric and created 2.5 Module. It's >thisclose< to 14 DP 14.5 PA. That > seems to have lasted around a decade before the industry said "No more of > this!" and everyone using 2.5 Mod gears stopped. Nobody anywhere has stock > 2.5 Mod gears but some places can make them to order. Takang is an Indian > company that used 2.5 Mod gears in the drive to the gearbox on their manual > lathes. Currently they only make CNC machines and don't acknowledge ever > making manual machines, despite having been one of the best selling brands > in India, with a healthy export business. > > On Thursday, July 23, 2020, 2:07:21 PM MDT, andrew beck < > [email protected]> wrote: > Gene I can get. Custom shaped endmills made in china easy as which is what > I will probably do soon. I might just get some gear tooth shaped endmills > made.. I get custom tools all the time for my tooling company > Regards > > Andrew > _______________________________________________ > 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
