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Double row cylindrical roller bearing types--Outer ring without flange NN0000 type and inner ring without flange NNU0000 type, they all have oil hole, and oil sump on bearing outer ring. It has greater radial load capability. Such bearings use on rolling mill (bearing inner hole and the roll neck clearance fit, bearing diameter and bearing seat inner hole clearance fit , and the radial clearance selection),it is same to four-row cylindrical roller bearings
Dimensions (mm) Basic load rating (KN) Speed ratings (rpm) Weight (kg) Number d D B Dynamic Staitc Grease Oil 240 360 92 870 1650 1050 1500 33 NN3048K 260 400 104 1040 1950 950 1300 47 NN3052K 400 104 1040 1950 950 1300 49 NN3052K 280 420 106 1100 2100 850 1100 49 NN3056K 420 106 1100 2100 850 1100 50 NN3056K 300 460 118 1270 2430 800 1000 71 NN3060 460 118 1270 2430 800 1000 70 NN3060K 320 480 121 1350 2650 750 950 75 NN3064K 340 520 133 1680 3260 700 900 104 NN3068K 360 540 134 1760 3500 670 850 106 NN3072 380 560 135 1720 3500 630 800 110 NN3076K 560 135 1720 3500 630 800 114 NN3076K 620 194 2910 6260 500 700 221 NN3176V 400 540 108 1340 2590 780 980 71 NN3980K 600 148 2140 3950 700 880 143 NN3080K 600 148 2140 3950 700 880 147 NN3080K 460 680 168 2670 5470 450 560 204 NN3092 560 750 140 2560 5250 470 590 188 NN39/560 780 180 2590 6910 450 560 266 NN6/560 820 195 2660 7080 340 430 341 NN30/560K 670 980 280 4990 10100 200 300 597 NN30/670K
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