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 LocationHome >> Technology >> Type Selection Calculation
Type Selection Calculation 

匯、Calculation for single-row ball slewing ring
1、Capacity of slewing ring
 C0 = f ,D,d
 In EqualityCo !!Capacity of bearing kN
        f !!Capacity factor 0.108 kN / mm2
        D !!Diameter of track center mm
        d !!Diameter of ball mm
2、Loading calculation

 In EqualityCp !!Loading caculation kN
        M !!Toppling movement kN,m
        Fa !!Axial force kN
        Fr !!Radial force kN
3、Safety factor calculation
   fs = Co / Cp
   fs see the following table。
屈、 Calculation for 3-row-roller slewing ring bearing
1、Capacity of slewing ring
 C0 = f ,D,d
 In EqualityCo !!Capacity of bearing kN
        f !!Capacity factor 0.172 kN / mm2
        D !!Diameter of track centermm
        d !!Upper row roller diametermm
2、Loading caculation

 In EqualityCp !!Loading caculationkN
        M !!Toppling movement kN,m
        Fa !!Axial forcekN
3、Safety factor calculation
   fs = Co / Cp
   fs see the following table 。
   Slewing ring safety factor fs

Types

Characteres

Examples

fs

light duty

not often at full capacity ,Slewing Speedfast,  assault  small steadily

Pile the material fetching machine struck-cranenonuse for port  wheel-crane

1.00゛1.15

middle duty

not often at full capacitySlewing Speed fasterassault 

tower-craneuse for baot cranepedrail-crane

1.15゛1.30

heavy duty

Often at full capacity ,Slewing Speed faster, assault big quickly

grab-bucket-cranen port-cranesingle bucket excavator Container crane

1.30゛1.45

extremely heavy duty

At full capacity assault big quickly or the workplace condition is abominable

bucket wheel excavator tunnel borermetallurgy craneoffshore platform crane

1.45゛1.70

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