R-ZZ系列：双面防尘盖径向滚珠球轴承

典型型号：R-515ZZ；R-615ZZ；R-620ZZ；R-620ZZY52；R-720ZZ(R-720ZZY03)；R-726ZZ;R-825ZZ;R-830ZZ;R-930ZZ(R-930ZZYO4);R-1030ZZ;R-1140ZZ;R-1240KK1;R-1340KK;R-1350ZZ;R-1450ZZ;R-156OX13KK;R-1640HHR-165OHH;R-1760X2ZZ;R-1950ZZ;R-1960ZZ;R-1970ZZ;R-1980KK;R-2270HH;R-2280HH;R-2210HH;R-2480KK;R-2412X3KK