Originally Posted by
paskinn
I found this thread interesting...not because I have a Jelco, but because the problem with inadequate support around the collar seems all too common. Even highly costly arms such as the Triplanar and Graham are fixed with just a screw forcing the superstructure of the arm against the column. Potential azimuth issues are only one problem with these designs. It just is not a decent engineering solution to 'lock' the arm with only a screw, the surface area is too small.
This is one of the areas where SME show their design superiority. Their arms include a properly engineered clamp so that the whole column is firmly grasped.