Высокоточный двухрядный цилиндрический роликоподшипник NSK NN4948MBKRCC0P4

Описание

Boundary Dimensions NN: Inner ring rib type Bearing Type d 240 mm Bore diameter D 320 mm Outside diameter B 80 mm Width r(min.) 2.1 mm Chamfer Dimension Basic Load Ratings C r 720 kN Basic Dynamic Load Rating C 0r 1450 kN Basic Static Load Rating Speeds Grease 2400 min -1 Limiting Speed Oil (Oil-air) 2900 min -1 Limiting Speed Dimensions Ew 300 mm Roller Circumscribed Circle Diameters s 1.8 mm Axial Displacement Abutment and Fillet Dimensions da(min.) 251 mm Diameter of Shaft Abutment d1a(min.) 254 mm Diameter of Shaft Abutment Da(min.) 302 mm Diameter of Housing Abutment Da(max.) 309 mm Diameter of Housing Abutment ra(max.) 2 mm Radius of Shaft or Housing Fillet Additional information CC1(max.) 50 μm Clearance in Bearings with Cylindrical Bores CC1(min.) 15 μm Clearance in Bearings with Cylindrical Bores CC1(max.) 100 μm Clearance in Bearings with Tapered Bores CC1(min.) 50 μm Clearance in Bearings with Tapered Bores CC0(max.) 65 μm Clearance in Bearings with Tapered Bores CC0(min.) 40 μm Clearance in Bearings with Tapered Bores CC9(max.) Clearance CC9 applicale to cylindrical roller bearings with tapered bores in ISO Tolerance Classes 5 and 4. 50 μm Clearance in Bearings with Tapered Bores CC9(min.) Clearance CC9 applicale to cylindrical roller bearings with tapered bores in ISO Tolerance Classes 5 and 4. 25 μm Clearance in Bearings with Tapered Bores 52 g/brg Recommended Grease Quantities Holes Dimensions dh 5 mm Hole Diameter W 9 mm Oil Groove Width m 4 Number of Holes Mass 17.8 kg Mass(approx.)