Y-bearings and Y-bearing units are normally
treated with a rust preventive compound and
can be stored in their original unopened package
for a number of years. However, they should be
kept in a vibration-free, dry environment where
the relative humidity does not exceed 60% and
the temperature is reasonably constant.
When Y-bearings and Y-bearing units are
stored for long periods, they may have a higher
initial starting torque than Y-bearings or units
recently delivered from the factory. Also, the
lubricating properties of the grease may have
deteriorated after long periods of storage.