F 13 Bearing No. index Bearing series (series name) Description Page NAXK··Z Combined needle roller bearing, combination heavy-duty needle roller and thrust ball bearing, caged, without inner ring, with dust cap, metric series B363, B460 NAXR Combined needle roller bearing, combination heavy-duty needle roller and thrust cylindrical roller bearing, caged, without inner ring, metric series B363, B462 NAXR··.Z Combined needle roller bearing, combination heavy-duty needle roller and thrust cylindrical roller bearing, caged, without inner ring, with dust cap, metric series B363, B462 NF2 Single-row cylindrical roller bearing, outer ring without rib on single side, inner ring with ribs A7, A56, B139, B142 NF3 Single-row cylindrical roller bearing, outer ring without rib on single side, inner ring with ribs A7, A56, B139, B142 NF4 Single-row cylindrical roller bearing, outer ring without rib on single side, inner ring with ribs A7, A56, B139, B144 NJ2 Single-row cylindrical roller bearing, outer ring with ribs, inner ring without rib on single side A7, A56, B139, B142 NJ22 Single-row cylindrical roller bearing, outer ring with ribs, inner ring without rib on single side A7, A56, B139, B142 NJ23 Single-row cylindrical roller bearing, outer ring with ribs, inner ring without rib on single side A7, A56, B139, B142 NJ3 Single-row cylindrical roller bearing, outer ring with ribs, inner ring without rib on single side A7, A56, B139, B142 NJ4 Single-row cylindrical roller bearing, outer ring with ribs, inner ring without rib on single side A7, A56, B139, B144 NK Heavy-duty needle roller bearing, caged, with ribs (inserted or integral), without inner ring, metric series A8, A55, A56, A59, B363, B432 NKS Heavy-duty needle roller bearing, caged, with ribs (inserted or integral), without inner ring, one lubrication hole and lubrication groove in the outer ring, metric series A8, A55, A56, A59, B363, B433 NN30 Double-row cylindrical roller bearing, outer ring without ribs, inner ring with ribs A7, A55, A56, B139, B178 NN30··K Double-row cylindrical roller bearing, outer ring without ribs, inner ring with ribs, tapered bore A7, A56, B139, B178 NNU49 Double-row cylindrical roller bearing, outer ring with ribs, inner ring without ribs A7, A55, A56, B139, B178 NNU49··K Double-row cylindrical roller bearing, outer ring with ribs, inner ring without ribs, tapered bore A7, A56, B139, B178 NTA Thrust needle roller and cage assemblies, without races, two-piece cage, inch series A12, B363, B452 NU10 Single-row cylindrical roller bearing, outer ring with ribs, inner ring without ribs A7, A55, A56, B139, B142 NU2 Single-row cylindrical roller bearing, outer ring with ribs, inner ring without ribs A7, A55, A56, B139, B142 NU22 Single-row cylindrical roller bearing, outer ring with ribs, inner ring without ribs A7, A55, A56, B139, B142 NU23 Single-row cylindrical roller bearing, outer ring with ribs, inner ring without ribs A7, A55, A56, B139, B142 NU3 Single-row cylindrical roller bearing, outer ring with ribs, inner ring without ribs A7, A55, A56, B139, B142