1. Product Overview NJ220 EM1 C3 is single row cylindrical roller bearing of NJ type structure. NJ means inner ring with single rib, outer ring without ribs; EM1 represents robust solid machined brass cage. C3 stands for increased radial internal clearance. This bearing can withstand heavy radial load and limited one-way axial load. The roller assembly can be separated from inner ring for convenient installation, inspection and maintenance. Widely used for heavy-duty