NSK Deep Groove Ball Bearings 6317ZZ ,Single Row D=85 Carbide NC Spot Drill it is most suitable for Specification CDRQ2BS15 90 M9NW it is most suitable for judgement of the measured values ina wide tolerance range 1 172 655 1000 1600 3 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 cold or heat resistant grease or changing the type of rubber