On Tuesday 11 March 2014 13:28:53 Jon Elson did opine: > 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. > With that > in hand, Gene could probably use one of those on-line belt > length > calculator programs to figure the correct belt length for > the distance > between shafts. > > Jon
Even simpler Jon, just add 2 cogs to the belt & everything falls right back at the proper place. It would take me about half an hour, piling bits and pieces back up on top of the adjacent tool cabinet to get where I could put a caliper on the C-C, which is very close to the maximum a 6" caliper can reach. The weather is good, so I'll mess with it some more today. But I am with John K., I think these pulleys are 3/16, not XL, and the new belts may in fact be XL's. There is a definite miss-fit, allowing about a 30 thou belly on the back of the pulley at the midpoint of the belt wrap. Belt cog and pulley wear (and heating under load) will be a wear factor that can't be ignored. Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ 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
