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Slewing Bearing Selection

XUZHOU XINDA SLEWING BEARING CO., LTD

Slewing Bearing Selection

                         Email: bearing@slewing-world.com
 Company: Add.:
 Title: Dept.:
 Tel: Fax:
Application:

 Axis of rotation

Mounting type

 

Horizontal □ Vertical □

 Horizontal□     Vertical □
Gear type:

Movement:

 No. of revolutions (RPM):
External □       

 positioning only□

 Normal:
Internal □   

intermittent rotation □

 Max:
Without □

continuous rotation  □

Load data
         Bearing load Loading type

A

B

C

  

max. working load  

max. test load

e.g. 25% overload

condition

Extreme load

e.g. shocks or

out of operation

  
Axial loadsparallel to axis of rotation  

 

  

KN
Radial loadsat right angle to axis of rotation (without gear loads)  

 

  

KN
Tilting moment  generated by axial load    

 

  

KN.m
Tilting moment generated by radial load  

 

  

KN.m
Final tilting moment  

 

  

KN.m
Tangential force per drive [kN]   Normal:                     Max:  No. of drives:
 Position:   ° apart

Slewing bearing type and dimension
Type: light type□   single row ball □     double row ball□     single row cross roller□     triple row cross roller□      
 
Dimension: OD :     mm □   ID:      mm  □   Height:   mm □
 For continuous rotation, variable and life requirements, please complete annex A.
 Annex A is enclosed:
 Remarks: (e.g. special working conditions / temperatures, required accuracies, bearing dimensions, inspection- or certification requirements, material tests etc.)

Appendix A

The percentage of working time and rotation speed under different load cases.

 

Slewing Ring Load Data

Load cases

axial
（KN）

radial
（KN）

Moment
（KN.m）

rotation speed
(rpm）

time
（%）
1          
2          
3          
4          
5          
6          
7          
8          
9          
10          
Continuous operation:
The service life(L10) :  at average speed:          rpm, service life is at least:           /hour
Intermittent operation:
Working life needed:  at angle+/-      °, the least recycle number:       

Appendix B

Gear data
External gear  □                        Internal gear □                 Involute gear □
Gear data
Definition  

Slewing ring

  pinion
Module m

 

 
Number of teeth  z

 

 
Pressure angle α

 

 
Helix angle β

 

 
Modification coefficient x

 

 
Coefficient of top clearance C

 

 
Gear width b

 

 
Precision grade

 

 
Gear center distance is adjustable    yes  □              no    □
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