... speed, high precision Characteristic of deep groove ball bearing:1. Seal form: open style, Z, ZZ, RS, 2RS, 2RZ2. Bearing ... steel, PTFE, nylon9. Bearing ferrule and ball hardness: 59 - 63HRCSeals:Seals, seals, oil seals, seal, shaft seal, hole seals, dust seal, guide ring, fixed seal, rotary ... design.6)The seals way of the bearing: RS: contact seal on one side of the bearing2RS: coontact seals on both ...