This Coal Pulverizing Hammer Mill application exposes the bearing to extreme dusty and vibratory conditions and the 22211 E1 KC3 spherical roller bearings in a standard SNK511 plummer block were lasting between 4 to 8 weeks.  The bearings were failing due to the ingress of coal dust in the bearings.

Our two CX2SN11-050 bearings ran perfectly from the 1st of October 2020 to 7th of June 2021.  The COC bearing lasted 8 months with easy installation and removal versus 1.5 months of operation with difficult installation and removal.