A solid bronze worm wheel with a stainless steel worm provides superior wear and longevity, The standard right ascension gear drive uses an aluminum worm wheel with a bronze worm.
The Mathis Instruments MI-500 12" Bronze Right Ascension Gear Upgrade was designed specifically for the Mathis Instruments MI-500 German Equatorial or Equatorial Fork Mount.
Generaly the right ascension drive tracks continuously, Therfore there is more wear on this axis. As an option, we suggest a bronze worm gear with a stainless steel worm for the RA axis. These materials are far superior to the more common aluminum worm gears one finds on nearly all other commercial mounts.
|Name||Mathis Instruments - Bronze right ascension gear for MI-500|