Slewing rings
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Slewing rings

For many years, Schaeffler has made a decisive contribution to the development and current level of rolling bearing technology, particularly through Its compact needle roller bearings, high load capacity cylindrical roller bearings and its diverse range of track rollers for rotary INA slewing rings are also known worldwide as premium products in the field of rolling bearing technology. These machine elements have proved themselves many times over; they have high load carrying capacity, a versatile range of applications and are highly cost-effective. Due to their design, a single bearing can...

Product range Overview/selection scheme Slewing rings Rolling element pitch circle axial on both sides 1> Special design with Schaeffler special plating Corrotect®. 2> For further designs see dimension table. 3> Values for slewing rings with standard clearance. 4> The values relate to the smallest and largest rolling element pitch circle diameter DM per series. Schaeffler Technologies

Schaeffler Technologies

Product range Overview/selection scheme Product index Ordering designation Ordering example, ordering designation Technical principles 12 Load carrying capacity and life 12 Static load carrying capacity 12 Definition of static load carrying capacity 12 Checking the static load carrying capacity 16 Dynamic load carrying capacity 16 Definition of dynamic load carrying capacity 16 Definition of basic rating life 16 Determining the basic rating life 18 Influences on the operating life of slewing rings 20 Static and dynamic load carrying capacity 20 Conditions for checking load carrying capacity...

Design of bearing arrangements Sealing of the bearing position Fixing screws Dimensioning of the flange thickness Permissible flatness and perpendicularity deviation of the adjacent construction Delivered condition of slewing rings Hardness gap on slewing rings General safety and operating guidelines Fitting of slewing rings Location of slewing rings Checking and adjustment of tooth flank backlash Measuring the tilting clearance Tightening torques and fitting preload forces for fixing screws Product range Four point contact bearings Dimension tables Crossed roller bearings Dimension tables...

Product index sorted alphanumerically Features Tables Page from page Type Four point contact bearing, external teeth, sealed, selectable Internal clearance, lubrication nipple on circumference of untoothed ring Four point contact bearing, internal teeth, sealed, selectable Internal clearance, lubrication nipple on circumference of untoothed ring Four point contact bearing, without teeth, sealed, selectable Internal clearance, lubrication nipple on outer ring circumference Four point contact bearing, light series 20, external gear teeth, selectable Internal clearance, sealed, lubrication...

Sorting criteria: Suffix Description H Hardened gear teeth on bearing ring N Normalised gear teeth on bearing ring V Quenched and tempered gear teeth on bearing ring VSP Bearing with preload ZT Centring on Inner and outer rings RR Corrosion-resistant design with INA special plating Corrotect® RLO, 1,2,3 Restricted internal clearance Schaeffler Technologies

Ordering designation The ordering designation gives a short description of the - for special bearing features only. The designation Is given In the dimension tables and describes the standard design of the bearing. The designation consists of several parts. - four point contact bearing (V), crossed roller bearing (X) ■ the type of gear teeth - external teeth (A), Internal teeth (I), without teeth (U) - rolling element diameter (Dw) - rolling element pitch circle diameter (DM). Suffixes are placed after the dimension-specific part. They indicate: ■ the heat treatment applied to the gear...

Ordering example, ordering designation Four point contact bearing V External gear teeth A Rolling element diameter 20 mm Rolling element pitch circle diameter 1 094 mm Normalised gear teeth N Restricted Internal clearance RL2 Ordering designation: AThe correct sequence of characters must be observed when ordering! Figure 3 • Ordering example, ordering designation ■ four point contact bearing VLA 20 Schaeffler Technologies

Unless stated otherwise, the values used In the text have the following symbols, units of measurement and definition. Ca kN Basic axial dynamic load dating Cr kN Basic radial dynamic load rating Coa kN Basic axial static load rating Cor kN Basic radial static load rating divi mm Mean bearing diameter Dy mm Rolling element pitch circle diameter Dw mm Rolling element diameter fs - Factor for additional safety Fa kN Dynamic axial bearing load Fr kN Dynamic radial bearing load Fz max kN Maximum permissible tooth force (fracture strength) Fz norm kN Permissible tooth force (fatigue strength) for...

n min-1 Operating speed of slewing ring P kN Equivalent dynamic bearing load Paxial kN Equivalent dynamic axial bearing load Pradial kN Equivalent dynamic radial bearing load Qspec kN/mm Specific load WR kN/m Special frictlonal force due to seals, cages, etc. X - Profile displacement factor a/\ - Screw tightening factor o¿o ° Transverse pressure angle of gear teeth 7 ° Half of swivel angle 8B mm Maximum permissible flatness deviation 8w mm Maximum permissible perpendicularity deviation 83 tilt riim Maximum permissible increase In tilting clearance € - Load eccentricity parameter (X -...

Load carrying capacity and life Static load carrying capacity The size of the slewing ring required is dependent on the ■ static and dynamic load carrying capacity [Dynamic load carrying capacity see page 16) I life (see Dynamic load carrying capacity and life, page 16) Definition of static load carrying capacity Slewing rings that undergo rotary motion only infrequently, undergo slow swivel motion, rotate only slowly or are subjected to load while stationary are dimensioned on the basis of their static load carrying capacity since the permissible load in these cases Is determined not by...