Cylindrical roller bearing single row – NU 2215 ECJ

Cylindrical roller bearing  single row – NU 2215 ECJ Results

• Bearing life : NU 2215 ECJ

   
  Input parameters

  Fr  Radial load	2.727 kN
  ni  Rotational speed of the inner ring	1500 r/min
  Operating temperature  Bearing outer ring	40 °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

  
  Result

   

  L10mh  SKF rating life	>1000000 hour
  aSKF  SKF life modification factor aSKF	50
  κ  Viscosity ratio	52.8
  P  Equivalent dynamic bearing load	2.73 kN
  ηc  Factor for contamination level	0.76
  ν1  Required kinematic viscosity for κ=1	9.47 mm2/s
  L10h  Basic rating life	>1000000 hour
  C/P  Load ratio	68.1

• Minimum load : NU 2215 ECJ

   
  Input parameters

  ni  Rotational speed of the inner ring

  1500 r/min

  Result
  
  

  Frm  Minimum radial load

  1.49 kN

• Frictional moment – power loss : NU 2215 ECJ

   
  Input parameters

  Fr  Radial load	2.727 kN
  ni  Rotational speed of the inner ring	1500 r/min
  Operating temperature  Bearing outer ring	40 °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 moment	367.1 Nmm
  Msl  Sliding frictional moment	8.39 Nmm
  Mseal  Frictional moment of the seals	0 Nmm
  Mdrag  Frictional moment of drag losses	0 Nmm
  M  Total frictional moment	375.4 Nmm
  Nr  Power loss	59 W
  ν  Lubricant viscosity at operating temperature	500 mm2/s
  Mstart  Starting torque at 20-30°C ambient and zero speed.	62.9 Nmm
  Krs  Replenishment/starvation constant	6.0E-8

• Bearing frequencies : NU 2215 ECJ

   
  Input parameters

  ni  Rotational speed of the inner ring	1500 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 ring	25 Hz
  fe  Rotational frequency of the outer ring	0 Hz
  fc  Rotational frequency of the rolling element and cage assembly	10.7 Hz
  fr  Rotational frequency of a rolling element about its own axis	84.4 Hz
  fip  Over-rolling frequency of one point on the inner ring	257.6 Hz
  fep  Over-rolling frequency of one point on the outer ring	192.4 Hz
  frp  Over-rolling frequency of one point on a rolling element	168.9 Hz

• Influence of load and lubricant viscosity on adjusted reference speed : NU 2215 ECJ

   
  Input parameters

  Fr  Radial load	2.727 kN
  Viscosity at 40 °C	500 mm2/s
  Lubrication	Grease

  Result
  
  

  fp  Adjustment factor for bearing load P	1
  fv  Adjustment factor for grease base oil viscosity	0.67
  ftot  fp fv with grease lubrication	0.67
  nar  Adjusted reference speed with grease lubrication	3730 r/min

• Relubrication intervals : NU 2215 ECJ

   
  Input parameters

  Locating arrangement	Constant axial load
  Fr  Radial load	2.727 kN
  ni  Rotational speed of the inner ring	1500 r/min
  Rotating ring	Inner ring rotation
  Shaft orientation	Horizontal shaft
  Operating temperature  Bearing outer ring	40 °C

  Result
  
  

  tf  Relubrication interval	23040 hours  1382400 km @60km/h
  Gp Grease quantity to be added when replenishing	20 g

• Viscosity : NU 2215 ECJ

   
  Input parameters

  ni  Rotational speed of the inner ring	1500 r/min
  Operating temperature  Bearing outer ring	40 °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 temperature	500 mm2/s
  ν1  Required viscosity at operating temperature for κ=1	9.47 mm2/s
  νref  Required viscosity at 40 °C for κ=1	9.47 mm2/s
  κ  Viscosity ratio	52.8

• Equivalent dynamic bearing load : NU 2215 ECJ

   
  Input parameters

  Fr  Radial load

  2.727 kN

  Result
  
  

  P  Equivalent dynamic bearing load

  2.73 kN

Unit system

Select unit system

SI 

 

Selected calculations

 

Bearing life, Minimum load, Frictional moment – power loss, Bearing frequencies, Influence of load and lubricant viscosity on adjusted reference speed, Relubrication intervals, Viscosity, Equivalent dynamic bearing load

 

Bearing data

 

Designation	NU 2215 ECJ *
d	75 mm
D	130 mm
C	186 kN
C0	208 kN
Type	Cylindrical roller bearing