NNU4921K NSK Double row cylindrical roller bearings

Brand Name: NSK
Model Number: NNU4921K
Series: 8500
Cone Part Number: 8575
Cup Part Number: 8522
Design Units: Imperial
Bearing Weight: 12.5 Kg
Cage Type: Stamped Steel
d: 234.95 mm
D: 328.625 mm
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Product Details

Series 8500
Cone Part Number 8575
Cup Part Number 8522
Design Units Imperial
Bearing Weight 12.5 Kg
Cage Type Stamped Steel
d 234.95 mm
D 328.625 mm
B - Cone Width 52.388 mm
C - Cup Width 36.513 mm
B 52.388 mm
R - Cone Backface To Clear Radius1 6.35 mm
r - Cup Backface To Clear Radius2 3.30 mm
da - Cone Frontface Backing Diameter 247.90 mm
db - Cone Backface Backing Diameter 259.08 mm
Da - Cup Frontface Backing Diameter 314.96 mm
Db - Cup Backface Backing Diameter 306.07 mm
Ab - Cage-Cone Frontface Clearance 3.3 mm
Aa - Cage-Cone Backface Clearance 6.1 mm
a - Effective Center Location3 7.6 mm
C90 - Dynamic Radial Rating (90 million revolutions)4 32500 lbf
C1 - Dynamic Radial Rating (1 million revolutions)5 126000 lbf
C0 - Static Radial Rating 240000 lbf
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 22700 lbf
K - Factor7 1.44
e - ISO Factor8 0.41
Y - ISO Factor9 1.48
G1 - Heat Generation Factor (Roller-Raceway) 1050.5
G2 - Heat Generation Factor (Rib-Roller End) 172.4
Cg - Geometry Factor 0.14
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