I watched milling of aluminium toothed pulleys at a company once. They had put a whole lot of 2" discs on a shaft, maybe 10" long, tightened up, and had the whole thing in a dividing head, then just milling grooves with an end mill. If there are buyers for the pulleys, you could do the same. The effort is almost the same, and you get to recoup your time costs.
While discussing pulley shapes, I thought this is quite interesting. See picture (not the best though). One might expect the belt to jam, but it obviously does not. Notice the flanges are on alternate sides. This allows a pulley, with walls, to be moulded in a simple two part mould. Completely irrelevant here, of course. http://www.fotothing.com/photos/9bf/9bf00269f5f6d51b810f9d2b2cc1d602.jpg Roland 2009/11/7 Erik Christiansen <dva...@internode.on.net> > On Sat, Nov 07, 2009 at 12:47:44PM +0000, Leslie Newell wrote: > > You don't need two cheeks on both pulleys. It is quite common to have two > > cheeks on the smaller pulley and none on the larger one. Another common > > setup is one cheek on each pulley, on opposite sides. As long as the > shafts > > are reasonably well aligned both arrangements work very well. > > The latter is _most_ interesting, because the gullets can then freely be > plunged with a slot drill from the side, and the tooth tips could be > chamfered quickly with a larger diameter cutter. (Assuming that a > chamfer is an adequate approximation of rounded corners.) > > > I have uploaded a 2D dxf of a 48T HTD pulley to filebin > > <http://filebin.ca/vucjb/48THTDpulley.DXF>. This was extracted from a > > 3D model from the SDP/SI website <http://www.sdp-si.com/> > > Asking wikipedia about "dxf file", I've found a long list of > applications which can display that stuff. I'll see if I can find one of > them on linux. (I see that it's a text file, but looking at that only > tells me that there are lots of arcs in the pulley. :-) > > Erik > > -- > Brahma said: Well, after hearing ten thousand explanations, a fool is no > wiser. But an intelligent man needs only two thousand five hundred. > -- The Mahabharata > > > > ------------------------------------------------------------------------------ > Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day > trial. Simplify your report design, integration and deployment - and focus > on > what you do best, core application coding. Discover what's new with > Crystal Reports now. http://p.sf.net/sfu/bobj-july > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
