gear wheel & worm question !

[Astrobob1973]

Hi guys I got a gear wheel and worm Just counted the teeth and there is 260 teeth 

do you think this would be OK as far as the number of teeth for making a  wide field astrophotography mount the gear wheel is 144.8 mm Circumference and its nicely made.

I would  use a stepper motor to drive the Assembly if this worm is OK

Thanks for any input as this would be most helpful.

[RAC]

It should be perfect.