I have recently received my MA-550 with MARB rotator base from UST. All
arrived in fine condition.
Included with the base bearing is a collar with setscrew. Collar is machined
with an eccentric 'rabbet' (for lack of a better word) in one of the two flat
The bearing has a mating eccentric machined on it. The shaft of the mast is
not large enough to enable the collar's setscrew to fix it in position.
The OD of the shaft is 1 1/2", the ID of the bearing is 1 3/4". Not exactly a
sliding fit. Can anyone tell me what's going on here. Do I just discard the
collar and drop the shaft through the bearing and go? Or is there a bushing or
something I'm missing. I received everything on the Bill of Lading.
Thanks in advance
Naturally it's Saturday. Can't call UST 'til Monday.
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