NNU4992 KOYO Double-row cylindrical roller bearings
Brand Name:KOYO
Model Number:NNU4992
Series:542000
Cone Part Number:EE542220
Design Units:Imperial
Cage Type:Stamped Steel
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)1:548000 lbf
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)2:142000 lbf
d:22.0000 in
B - Cone Width:3.0000 in
PDF NNU4992

Product Details

Series542000
Cone Part NumberEE542220
Design UnitsImperial
Cage TypeStamped Steel
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)1548000 lbf
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)2142000 lbf
d22.0000 in
B - Cone Width3.0000 in
R - Cone Backface To Clear Radius30.25 in
da - Cone Frontface Backing Diameter23.03 in
db - Cone Backface Backing Diameter23.39 in
Ab - Cage-Cone Frontface Clearance0.15 in
Aa - Cage-Cone Backface Clearance0.59 in
a - Effective Center Location42.55 in
C90 - Dynamic Radial Rating (90 million revolutions)581600 lbf
C1 - Dynamic Radial Rating (1 million revolutions)6315000 lbf
C0 - Static Radial Rating728000 lbf
Ca90 - Dynamic Thrust Rating (90 million revolutions)771000 lbf
K - Factor81.15
G1 - Heat Generation Factor (Roller-Raceway)5730
G2 - Heat Generation Factor (Rib-Roller End)782
Cg - Geometry Factor0.26
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Company Profile

TIMKEN BEARING MFG.CORP
Phone 409-782-6227
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