On Monday 10 March 2014 01:05:49 Jon Elson did opine: > On 03/09/2014 10:20 PM, Gene Heskett wrote: > > Greetings; > > > > I have no clue why, but the replacement belt I got from LMS to replace > > the one I burnt some cogs out of, is now too short by at least 2, > > maybe 4 teeth. > > Try to make sure the belt fits the pulley properly. The > difference between > metric and imperial belt sizes is REALLY small. The worst > is MXL, which > are .080", and the 2mm counterpart, which is only slightly > smaller.
Humm, the only check I have made is to see that a 3/4 way around wrap in the larger, flange less pulley fits well, and it does fit, perfectly. Sine this thing is a Chinese lathe originally, its a pretty safe bet it's metric. With caliper (digital) in hand, I cannot say as to whether the distance between cogs is 4mm, or .160", (only 2 thou difference that my eyes can't see) but that just about fits from cog top to cog top either way. Measuring across 2 cogs of the larger pulley which except for the wallered out keyway is not that badly worn, I get a reading in the 7.09mm to 7.14mm range with the tips squeezing the root of two adjacent cogs. Measuring the valley between cogs, I get a pretty consistent 1.57mm to 1.58mm. But those measurements don't even come close to what I see in the catalogs. As you can imagine, confusion reigns supreme here.. > But, if you wrap the wrong belt around a larger pulley, the > mismatch > eventually accumulates so the teeth won't line up all the > way around. They align perfectly when wrapped about 3/4 of the way around on the larger pulley, which carries no markings at all, it has a 10mm bore and a 4mm key broaching, which is odd (std is a 3mm keyway) and raised the price of a metal pulley about $40 because of the tooling change. That pretty much kicked any interest in metal pulleys out the door because I can buy both of the pulleys and the belt about 10 times by the time I'd had a set of metal ones made for around $170. > That could account for the belt being just a bit short. > I've run into this. > > Otherwise, you will probably have to count all the teeth. > > Jon > Thanks Jon. > > ------------------------------------------------------------------------ > ------ 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 > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
