Cylindrical roller bearing single row – NU 2215 ECJ Results
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Bearing life : NU 2215 ECJ
Input parameters
Fr
Radial load2.727 kN ni
Rotational speed of the inner ring1500 r/min Operating temperature
Bearing outer ring40 °C ηc specification method Cleanliness classification(recommended) Lubricant type and cleanliness Normal cleanliness (e.g. shielded bearing) Viscosity calculation input type Viscosity input at 40 °C and 100 °C Viscosity at 40 °C
500 mm2/s Viscosity at 100 °C
32 mm2/s
ResultL10mh
SKF rating life>1000000 hour aSKF
SKF life modification factor aSKF50 κ
Viscosity ratio52.8 P
Equivalent dynamic bearing load2.73 kN ηc
Factor for contamination level0.76 ν1
Required kinematic viscosity for κ=19.47 mm2/s L10h
Basic rating life>1000000 hour C/P
Load ratio68.1 -
Minimum load : NU 2215 ECJ
Input parameters
ni
Rotational speed of the inner ring1500 r/min Result
Frm
Minimum radial load1.49 kN -
Frictional moment – power loss : NU 2215 ECJ
Input parameters
Fr
Radial load2.727 kN ni
Rotational speed of the inner ring1500 r/min Operating temperature
Bearing outer ring40 °C Viscosity calculation input type Viscosity input at 40 °C and 100 °C Viscosity at 40 °C
500 mm2/s Viscosity at 100 °C
32 mm2/s Lubrication Grease Result
Mrr
Rolling frictional moment367.1 Nmm Msl
Sliding frictional moment8.39 Nmm Mseal
Frictional moment of the seals0 Nmm Mdrag
Frictional moment of drag losses0 Nmm M
Total frictional moment375.4 Nmm Nr
Power loss59 W ν
Lubricant viscosity at operating temperature500 mm2/s Mstart
Starting torque at 20-30°C ambient and zero speed.62.9 Nmm Krs
Replenishment/starvation constant6.0E-8 -
Bearing frequencies : NU 2215 ECJ
Input parameters
ni
Rotational speed of the inner ring1500 r/min ne
Rotational speed of the outer ring (only used to calculate the bearing frequencies)0 r/min Result
fi
Rotational frequency of the inner ring25 Hz fe
Rotational frequency of the outer ring0 Hz fc
Rotational frequency of the rolling element and cage assembly10.7 Hz fr
Rotational frequency of a rolling element about its own axis84.4 Hz fip
Over-rolling frequency of one point on the inner ring257.6 Hz fep
Over-rolling frequency of one point on the outer ring192.4 Hz frp
Over-rolling frequency of one point on a rolling element168.9 Hz -
Influence of load and lubricant viscosity on adjusted reference speed : NU 2215 ECJ
Input parameters
Fr
Radial load2.727 kN Viscosity at 40 °C
500 mm2/s Lubrication Grease Result
fp
Adjustment factor for bearing load P1 fv
Adjustment factor for grease base oil viscosity0.67 ftot
fp fv with grease lubrication0.67 nar
Adjusted reference speed with grease lubrication3730 r/min -
Relubrication intervals : NU 2215 ECJ
Input parameters
Locating arrangement Constant axial load Fr
Radial load2.727 kN ni
Rotational speed of the inner ring1500 r/min Rotating ring Inner ring rotation Shaft orientation Horizontal shaft Operating temperature
Bearing outer ring40 °C Result
tf
Relubrication interval23040 hours
1382400 km @60km/h
Gp
Grease quantity to be added when replenishing20 g -
Viscosity : NU 2215 ECJ
Input parameters
ni
Rotational speed of the inner ring1500 r/min Operating temperature
Bearing outer ring40 °C Viscosity calculation input type Viscosity input at 40 °C and 100 °C Viscosity at 40 °C
500 mm2/s Viscosity at 100 °C
32 mm2/s Result
ν
Lubricant viscosity at operating temperature500 mm2/s ν1
Required viscosity at operating temperature for κ=19.47 mm2/s νref
Required viscosity at 40 °C for κ=19.47 mm2/s κ
Viscosity ratio52.8 -
Equivalent dynamic bearing load : NU 2215 ECJ
Input parameters
Fr
Radial load2.727 kN Result
P
Equivalent dynamic bearing load2.73 kN