Moorefam

Thanks for replying. I have used PTFE tape on the thread to stiffen things up and make the knob less lighten to loosen. I will try that. I don't know why they didn't use a threaded rod touching the mount and at the other end us 2 lock nuts instead of the knob. I am asking the supplier if I can file down the excess on the post so that the rotating surface are flush and still send it back if everything doesn't work out.

I bought this pillar a week ago but the Az EQ6 mount keeps working loose with respect to the adaptor plate. It came with no instructions. I assume I have to tighten the knob underneath (which acts through a roller bearing) enough for rigidity, but not so tight that Az adjustment cannot be made. A complication is that the short post gripped by the 2 opposing Az adjusting knobs is too long and prevents the 2 rotating surfaces from mating flush with each other. I could always file it down 0.5mm. How do other users prevent the mount working loose on the pillar? The 3 retaining screws hold the adaptor piece in place well enough though and otherwise the pillar is very sturdy. This is my first post here by the way.