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Old 13-04-2017, 02:45 PM
glend (Glen)
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glend is offline
 
Join Date: Jun 2013
Location: Lake Macquarie
Posts: 7,121
Watch for Rust

Just a 'heads up' on possible rust developing on parts of the CGX. The long Alt and Az adjustment bolts are mild steel not stainless. I had the beginnings of rust on mine near the handles on non-threaded section where the knob shaft sticks out from the mount. This is probably due to condensation cycles. My mount is on a pier in my observatory, so is always somewhat exposed to humidity variations, unlike one kept inside in a box until setup on a tripod. It would have been nice for Celestron to use Stainless Steel for these parts, especially since they advertise it as an observatory mount, i suppose they saved a couple of bucks by using mild steel.
So how do you prevent the rust if pier mounted? The best way is probably to shield it by painting the shafts with a rust preventative epoxy enamel. Burnish off any rust with emery paper and put on a couple of coats of satin black, which matches the mount.
I have added this to my CGX Mods, Fixes, and Adjustment thread on Cloudy Nights, photos are there as well.
This applies to CGX Ls as well.
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