More on fridge motors/compressors.

[metric_taper]

The other end of the shaft is extended and is tapered. It was a while ago when I extracted this motor from its case and I don't recall if that shaft and taper had any function.

I believe that taper, is an oil pump, it rotates in the sump of oil, and centrifugal forces of the oil in the hollow shaft brings the oil to the top of the hollow crank shaft, where it slings out to lube the con rod via an oil gallery, and the piston.