NNU4948 NSK Double row cylindrical roller bearings

Brand Name: NSK
Model Number: NNU4948
Series: 752000
Cone Part Number: EE752305
Design Units: Imperial
Cage Type: Pin-Type
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)1: 961000 lbf
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)2: 249000 lbf
d: 30.5000 in
B - Cone Width: 3.1875 in
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Product Details

Series 752000
Cone Part Number EE752305
Design Units Imperial
Cage Type Pin-Type
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)1 961000 lbf
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)2 249000 lbf
d 30.5000 in
B - Cone Width 3.1875 in
R - Cone Backface To Clear Radius3 0.25 in
da - Cone Frontface Backing Diameter 31.42 in
db - Cone Backface Backing Diameter 31.89 in
Ab - Cage-Cone Frontface Clearance 0.51 in
Aa - Cage-Cone Backface Clearance 0.47 in
a - Effective Center Location4 2.5 in
C90 - Dynamic Radial Rating (90 million revolutions)5 143000 lbf
C1 - Dynamic Radial Rating (1 million revolutions)6 552000 lbf
C0 - Static Radial Rating 1240000 lbf
Ca90 - Dynamic Thrust Rating (90 million revolutions)7 98400 lbf
K - Factor8 1.45
G1 - Heat Generation Factor (Roller-Raceway) 12500
G2 - Heat Generation Factor (Rib-Roller End) 1880.8
Cg - Geometry Factor 0.312
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