NNU4938 KOYO Double-row cylindrical roller bearings

Brand Name:KOYO
Model Number:NNU4938
Cone Part Number:LL382149
Cup Part Number:LL382110
Design Units:Imperial
Bearing Weight:54.8 Kg
Cage Type:Stamped Steel
d:698.500 mm
D:819.150 mm

Product Details

Cone Part NumberLL382149
Cup Part NumberLL382110
Design UnitsImperial
Bearing Weight54.8 Kg
Cage TypeStamped Steel
d698.500 mm
D819.150 mm
B - Cone Width63.5 mm
C - Cup Width50.800 mm
B63.5 mm
R - Cone Backface To Clear Radius13.300 mm
r - Cup Backface To Clear Radius23.30 mm
da - Cone Frontface Backing Diameter717.04 mm
db - Cone Backface Backing Diameter720.09 mm
Da - Cup Frontface Backing Diameter803.91 mm
Db - Cup Backface Backing Diameter791.97 mm
Ab - Cage-Cone Frontface Clearance0.8 mm
Aa - Cage-Cone Backface Clearance5.3 mm
a - Effective Center Location354.6 mm
C90 - Dynamic Radial Rating (90 million revolutions)461500 lbf
C1 - Dynamic Radial Rating (1 million revolutions)5237000 lbf
C0 - Static Radial Rating716000 lbf
Ca90 - Dynamic Thrust Rating (90 million revolutions)636800 lbf
K - Factor71.67
e - ISO Factor80.35
Y - ISO Factor91.72
G1 - Heat Generation Factor (Roller-Raceway)9940
G2 - Heat Generation Factor (Rib-Roller End)2090.8
Cg - Geometry Factor0.274
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