NNU4972 KOYO Double-row cylindrical roller bearings

Brand Name: KOYO
Model Number: NNU4972
Series: 18000
Cone Part Number: 18204X
Cup Part Number: 18335X
Design Units: Imperial
Bearing Weight: 0.4 Kg
Cage Type: Stamped Steel
d: 51.999 mm
D: 85.001 mm
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Product Details

Series 18000
Cone Part Number 18204X
Cup Part Number 18335X
Design Units Imperial
Bearing Weight 0.4 Kg
Cage Type Stamped Steel
d 51.999 mm
D 85.001 mm
B - Cone Width 18.263 mm
C - Cup Width 12.499 mm
B 19.050 mm
R - Cone Backface To Clear Radius1 2.030 mm
r - Cup Backface To Clear Radius2 1.52 mm
da - Cone Frontface Backing Diameter 56.90 mm
db - Cone Backface Backing Diameter 59.94 mm
Da - Cup Frontface Backing Diameter 82.00 mm
Db - Cup Backface Backing Diameter 75.95 mm
Ab - Cage-Cone Frontface Clearance 2.3 mm
Aa - Cage-Cone Backface Clearance 1.8 mm
a - Effective Center Location3 2 mm
C90 - Dynamic Radial Rating (90 million revolutions)4 3010 lbf
C1 - Dynamic Radial Rating (1 million revolutions)5 11600 lbf
C0 - Static Radial Rating 14400 lbf
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 2920 lbf
K - Factor7 1.03
e - ISO Factor8 0.57
Y - ISO Factor9 1.06
G1 - Heat Generation Factor (Roller-Raceway) 26.1
G2 - Heat Generation Factor (Rib-Roller End) 20.3
Cg - Geometry Factor 0.0852
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