NSK Deep Groove Ball Bearings 6040M ,Single Row D=200 Rainbow Ball Hex Key Set Reference Mechanical Grease Oil NJ330M Plasma Shield Cup Reference Mechanical Grease Oil NJ330M 150 320 65 4 4 193 760 920 2200 1800 2200 27 Cr C0r Grease Oil 6014 70 110 20 1 1 207 226 1900 2200 15 due to contact seal Speed capability Good Good Limited by contact seals Grease sealing effectiveness Good Better than ZZ type Slightly better than VV type Dust resistance Good Better than ZZ type (usable in moderately dusty environments) Best (usable even in very dusty environments) Water resistance Not suitable Not suitable Good (usable even if fluid is splashed on bearing) Operating temperature –10 to +110 °C –10 to +110 °C –10 to +110 °C Note (1) The above temperature range applies to standard bearings