One point is (pun intended) is the arm a unipivot?
Or a standard dual bearing on the sides.
Unipivot arms are pivoting on a single pinpoint bearing, and can easily wobble around if they are not set up well.
Unipivot arms can be lifted right off the pivot. And if not set properly on the pivot, may display a lot of bad behavior, like not working well ar all.
So, you can tell (anyone can tell) if they have a unipivot arm by lifting up on the arm. A unipivot will just lift right off the base. Any arm with standard bearings will not lift off the base.
If you DO lift a unipivot off the bearing. care is needed to set it down so the spike is correctly in the cup of the arm.
Or a standard dual bearing on the sides.
Unipivot arms are pivoting on a single pinpoint bearing, and can easily wobble around if they are not set up well.
Unipivot arms can be lifted right off the pivot. And if not set properly on the pivot, may display a lot of bad behavior, like not working well ar all.
So, you can tell (anyone can tell) if they have a unipivot arm by lifting up on the arm. A unipivot will just lift right off the base. Any arm with standard bearings will not lift off the base.
If you DO lift a unipivot off the bearing. care is needed to set it down so the spike is correctly in the cup of the arm.

