On Friday 15 May 2015 10:13:46 Gene Heskett wrote: > On Friday 15 May 2015 10:03:49 andy pugh wrote: > > On 15 May 2015 at 14:54, Gene Heskett <[email protected]> wrote: > > > When the belt starts slipping cogs, the drivers PID cranks up the > > > power, and the pulley, being plastic, the teeth melt from the > > > friction and smear the grooves shut > > > > The very concept of a plastic pulley had not occurred to me. > > > > Yick! > > You need speeling lessons Andy, around these parts thats a > yyeeeuuuuuccchh. Or something like that. ;-) > > Cheers, Gene Heskett
To continue this nearly sterile thread, I have now spent about 3 hours looking for an HTD belt/pulley setup that might replace this. LMS is out of the plastic, 9mm bore pulley till the end of June. But the instant I mention a metric bore, I am getting crickets. What I need is a 9mm or 10mm wide, 10mm bore + keyway, steel or alu HTD pulley, flangeless, with a maximum OD with its belt mounted, of about 47.5mm. And a flanged pulley for the other end on my jackshaft, to fit the 9.08mm wide belt, with a 9mm bore & key slot, max OD as the belt is mounted 30mm. Anything between 27 and 33mm pitch OD would be fine. The existing belt, with its very low profile cogs, 1.37mm thick in the web, and 2.07 mm thick at the top of the cog, to be replaced by the HTD profiled belt that would be perhaps as much as 10mm longer than the 1.5X70 used now if the lower, flanged pulley was expanded to 30mm, it is 27mm with this poor, damn near no cogs belt mounted. Is there such a beast/kit that isn't $500? That is one of the reasons I am thinking polygroove, its 10% of the cost of the timeing pulleys, belts are comparable and I can make the pulleys's if I can rescue one of these but that is doubtfull. Except I may have extended the working life a bit. I chucked the best one of the three I've burned up in the chuck on my rotary table, divided 360 by 17 (the number of cogs, and laid a 1/16th" dremel grout rotary file in to it to remove tha majority of the smeared plastic from the grooves. At 500 revs, no load my ir thermometer says the pulley is heating about 10F, and the belt is takibg a hammering because it doesn't fit exactly correct. A combination of 1/2" alu scrap and a .090" thick lexan has now been driven in to wedge the countershaft frame solidly. It might last long enough to finish the polygroove pulleys for the mill. Maybe. Cheers, Gene Heskett -- "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> ------------------------------------------------------------------------------ One dashboard for servers and applications across Physical-Virtual-Cloud Widest out-of-the-box monitoring support with 50+ applications Performance metrics, stats and reports that give you Actionable Insights Deep dive visibility with transaction tracing using APM Insight. http://ad.doubleclick.net/ddm/clk/290420510;117567292;y _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
