NSK Deep Groove Ball Bearings 6015 ,Single Row D=75 Aviation Snips Set 250 Professional & Home use 343 8392 250 Professional & Home use Left handed A 280 Tamperproof Star Bit Socket 50mmL 9 : 19 Series 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