Alan_Cheatham
Member
Alan_Cheatham : So being all that said which bearing number has been replaced by the old MRC 5206CZZ
SKF owns MRC but the MRC brand is still used.
Look for SKF 5206E2RS
Look for MRC 5206MZZ
These are the preferable MAX bearings (they have a few extra balls) and rubber seals on each side. Max bearings have an extra margin of safety in my opinion but in order to put the bearing together there is a loading slot cut on one side of the bearing, this slot must go DOWN (face toward the ground) in the rotor head or there could be premature bearing failure.
Download this file: http://www.skf.com/files/519959.pdf
It will help you to identify where the loading slot is.
If you can not find MAX bearings:
Look for SKF 5206A2RS
Look for MRC 5206CZZ
These are the non MAX bearings (called Conrad), there is not a loading slot to worry about so the bearing can go into the head either way. Load-wise both max and non max bearings are fine but I believe a bearing with extra balls is safer if the cage should somehow suffer a failure and the balls congregate to one side of the bearing.
If you have a RFD head I would think one seal could be removed from the bearing.
The 3206 bearing number also appears to interchange with 5206 and some use this bearing in their heads as well, you can search the forum for info.
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