Many times arm bearing problems are due to the relaxation of the metals of the given pillars, over time.
The metal relaxing will either tighten, or loosen the bearings.
This is so pervasive, that with Dual turntables, the bearing tightening or adjusting procedure is plainly spelled out in the service manuals. ALL dual turntables need this. When done, and it is fairly simple to do..when done, they go back to being superb budget turntables.
Not all arms suffer from it, but some have a little bit.
Other than that, they can be fairly robust, but one can flat spot the bearings, if not careful.
But, yes, indeed, in most cases they are fairly tough.
The metal relaxing will either tighten, or loosen the bearings.
This is so pervasive, that with Dual turntables, the bearing tightening or adjusting procedure is plainly spelled out in the service manuals. ALL dual turntables need this. When done, and it is fairly simple to do..when done, they go back to being superb budget turntables.
Not all arms suffer from it, but some have a little bit.
Other than that, they can be fairly robust, but one can flat spot the bearings, if not careful.
But, yes, indeed, in most cases they are fairly tough.