Sometime before summer hits the Pacific Northwest (and thus clear skies), I'm planning on doing a teardown and rebuild of my EQ-5 mount. After studying many guides and forum entries from lots of astronomy related sites, I'm scratching my head at what grease to use. For the worm gears, I'm almost certainly using a white lithium grease, but I'm unsure about what to use for the actual bearing surfaces. I've read that some people say use white lithium grease for all surfaces, but others say that is too thin and you need something thicker (but not as thick as the
glue grease the manufacturers use).
Also, this may be a stupid question, but how does the worm gear turn each axis of a GEM? I like to think that I'm at least competent at using these sorts of mounts, yet I've never really gotten how the rotation worm assembly affects the axis. I get that a worm gear is an inherently one directional system and that the worm gear can never turn the worm, but is there just enough friction that the worm turns the axis, but the axis doesn't catch too much on the worm?