On Tue, Mar 11, 2014, at 12:41 PM, Jon Elson wrote: > On 03/11/2014 08:27 AM, John Kasunich wrote: > > > > > > > > OK, math done. The pitch comes out to 0.1855", which has me mystified, > > because I've never heard of such a thing. (I've done a fair bit if tooth- > > belt research for different projects.) > > > > > Well, 5 mm is ~ .197", so maybe accounting for the pitch > diameter to be > larger than the pulley OD, that could match up. these > numbers are only > about 6% different. So, it certainly could be a perfect 5 > mm PD at > the actual diameter where it is supposed to be measured.
Nope. The math I did took that into account. The distance from pulley OD up to pitch diameter is a characteristic of the belt, so it is the same for both pulleys. The unknowns are pitch and "difference between OD and PD". The knowns are tooth count and OD for two different size pulleys. The result is two equations with two unknowns, and is solvable. The pitch would have to be within a couple thou of 0.1855". No way could it be 5mm. -- John Kasunich jmkasun...@fastmail.fm ------------------------------------------------------------------------------ Learn Graph Databases - Download FREE O'Reilly Book "Graph Databases" is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/13534_NeoTech _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
