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NN3056KR

Double-Row Cylindrical Roller Bearings
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Parts Number
NN3056KRCC9P4 Double-Row Cylindrical Roller Bearings
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Parts Number

NN3056KRCC9P4

Boundary Dimensions

NN: Inner ring rib type Bearing Type
d 280 mm Bore diameter
D 420 mm Outside diameter
B 106 mm Width
r(min.) 4 mm Chamfer Dimension

Basic Load Ratings

Cr 1080 kN Basic Dynamic Load Rating
C0r 2080 kN Basic Static Load Rating

Speeds

Grease 1900 min-1 Limiting Speed
Oil (Oil-air) 2300 min-1 Limiting Speed

Dimensions

Ew 384 mm Roller Circumscribed Circle Diameters
s 3.5 mm Axial Displacement

Abutment and Fillet Dimensions

da(min.) 296 mm Diameter of Shaft Abutment
d1a(min.) 298 mm Diameter of Shaft Abutment
Da(min.) 388 mm Diameter of Housing Abutment
Da(max.) 404 mm Diameter of Housing Abutment
ra(max.) 3 mm Radius of Shaft or Housing Fillet

Additional information

CC1(max.) 55 μm Clearance in Bearings with Cylindrical Bores
CC1(min.) 20 μm Clearance in Bearings with Cylindrical Bores
CC1(max.) 110 μm Clearance in Bearings with Tapered Bores
CC1(min.) 55 μm Clearance in Bearings with Tapered Bores
CC0(max.) 70 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. 55 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
157 g/brg Recommended Grease Quantities

Holes Dimensions

dh 6 mm Hole Diameter
W 12 mm Oil Groove Width
m 4 Number of Holes

Mass

47.7 kg Mass(approx.)
CAD
More Information
NSK Product Type2 SP_CRB_DR_NN30
NSK Product Type Super Precision Bearing
Designations NN3056KR

© NSK Ltd.

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