Just make sure the ones you buy are rated for the torque you need. The level of transmittable torque is the weakest link in a HD.
Fwiw J. Johnson ----- Original Message ----- From: Peter Blodow <p.blo...@dreki.de> Date: Thursday, December 30, 2010 5:48 am Subject: Re: [Emc-users] synchronous belt supply > Hello Viesturs, > have a look at www.*harmonicdrive*.de/. > They make gear boxes with a very high reduction rate in one stage, > absolutely backlash free. The principle is the rotation of a so > called > flexible spline (having (n) teeth around its outside) which is > steadily > deformed by the rotating elliptical (really!) ball bearing inside. > The > spline, in turn, rotates engaged inside the gear box having (n+2) > teeth > inside. So, one rotation of the ellipse makes the spline wander by > only > 2 teeth giving a high reduction rate, typically 100:1. Those > "gear" > boxes are relatively small, too. There is no momentum on the > driven > axis, all force is exerted at the circumference causing high > stiffness. > They are used for large telescopes, for instance, where these > properties > - together with a lot of torque - are essential. They have their > price, > though, I believe. By the way: I don't get paid by the company, > just > considered using those drives for my telescope mount some time ago. > There is another (Bavarian!) company near us that was taken over > by the > Japanese recently. They use the cycloid principle for reduction, > rather > similar. Look at www.sumitomodriveeurope.com. > > Greetings and best wishes for the New Year from > Peter Blodow > > > Viesturs La-cis schrieb: > > 2010/12/29 Bill Hribar <billhri...@yahoo.com>: > > > >> Hi All! > >> > >> Happy New Year! > >> > >> Anyway, dues anyone have a good source for synchronous belts > and pulleys, with > >> reasonable prices? > >> > >> > > > > Can anyone suggest a good source for worm-gearbox? Or whatever > > reductors they use in robot arms - I have to build one. Thanks! > > > > Viesturs > > > > ----------------------------------------------------------------- > ------------- > > Learn how Oracle Real Application Clusters (RAC) One Node allows > customers> to consolidate database storage, standardize their > database environment, and, > > should the need arise, upgrade to a full multi-node Oracle RAC > database > > without downtime or disruption > > http://p.sf.net/sfu/oracle-sfdevnl > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > > > > ------------------------------------------------------------------- > ----------- > Learn how Oracle Real Application Clusters (RAC) One Node allows > customersto consolidate database storage, standardize their > database environment, and, > should the need arise, upgrade to a full multi-node Oracle RAC > database > without downtime or disruption > http://p.sf.net/sfu/oracle-sfdevnl > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Learn how Oracle Real Application Clusters (RAC) One Node allows customers to consolidate database storage, standardize their database environment, and, should the need arise, upgrade to a full multi-node Oracle RAC database without downtime or disruption http://p.sf.net/sfu/oracle-sfdevnl _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
