Yes, the housing could be changed. About grease, the producers of beaings give as option to fill the bearing with custom grease. So it is possible...
I will give here more details. You guess right - ball bearing. Bearing is nested in aluminium body and here is the problem. Expansion coeficient...
Can you advice me , please, for bearings working normaly (easy) in extremly low temperatures as -50 C ?
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