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Slewing Rings
Symbols and units
Function
Selection criteria
Static load capacity of raceway
Mounting bolts
Friction torque
Gear
Lubrication
Design of mounting structure
A few simple steps for selecting a Slewing Ring
The correct Slewing Ring in 5 steps
<!--TYPO3SEARCH_begin--><a name="409"></a><table class="contenttable"><tbody><tr><td valign="top"><p class="bodytext">C<sub>ax</sub></p></td><td valign="top"><p class="bodytext">kN</p></td><td valign="top"><p class="bodytext">Basic axial dynamic load rating</p></td></tr><tr><td valign="top"><p class="bodytext">C<sub>axT</sub></p></td><td valign="top"><p class="bodytext">kN</p></td><td valign="top"><p class="bodytext">Basic axial dynamic load rating, supporting raceway</p></td></tr><tr><td valign="top"><p class="bodytext">C<sub>axH</sub></p></td><td valign="top"><p class="bodytext">kN</p></td><td valign="top"><p class="bodytext">Basic axial dynamic load rating, retaining raceway</p></td></tr><tr><td valign="top"><p class="bodytext">C<sub>rad</sub></p></td><td valign="top"><p class="bodytext">kN</p></td><td valign="top"><p class="bodytext">Basic radial dynamic load rating</p></td></tr><tr><td valign="top"><p class="bodytext">C<sub>0ax</sub></p></td><td valign="top"><p class="bodytext">kN</p></td><td valign="top"><p class="bodytext">Basic axial static load rating</p></td></tr><tr><td valign="top"><p class="bodytext">C<sub>0axT</sub></p></td><td valign="top"><p class="bodytext">kN</p></td><td valign="top"><p class="bodytext">Basic axial static load rating, supporting raceway</p></td></tr><tr><td valign="top"><p class="bodytext">C<sub>0axH</sub></p></td><td valign="top"><p class="bodytext">kN</p></td><td valign="top"><p class="bodytext">Basic axial static load rating, retaining raceway</p></td></tr><tr><td valign="top"><p class="bodytext">C<sub>0rad</sub></p></td><td valign="top"><p class="bodytext">kN</p></td><td valign="top"><p class="bodytext">Basic radial static load rating</p></td></tr><tr><td valign="top"><p class="bodytext">D<sub>L</sub></p></td><td valign="top"><p class="bodytext">mm</p></td><td valign="top"><p class="bodytext">Raceway diameter of rolling elements</p></td></tr><tr><td valign="top"><p class="bodytext">D<sub>w</sub></p></td><td valign="top"><p class="bodytext">mm</p></td><td valign="top"><p class="bodytext">Diameter of rolling elements</p></td></tr><tr><td valign="top"><p class="bodytext">f<sub>a</sub></p></td><td valign="top"><p class="bodytext">—</p></td><td valign="top"><p class="bodytext">Application service factor</p></td></tr><tr><td valign="top"><p class="bodytext">F<sub>ax</sub></p></td><td valign="top"><p class="bodytext">kN</p></td><td valign="top"><p class="bodytext">Axial load including all occurring shock loads and required safety factors, calculated from all axial forces</p></td></tr><tr><td valign="top"><p class="bodytext">F<sub>axD</sub></p></td><td valign="top"><p class="bodytext">kN</p></td><td valign="top"><p class="bodytext">Equivalent axial load including application service factor for determining the load point in the limiting load diagram</p></td></tr><tr><td valign="top"><p class="bodytext">F<sub>rad</sub></p></td><td valign="top"><p class="bodytext">kN</p></td><td valign="top"><p class="bodytext">Radial load including all occurring shock loads and required safety factors, calculated from all radial forces</p></td></tr><tr><td valign="top"><p class="bodytext">F<sub>radD</sub></p></td><td valign="top"><p class="bodytext">kN</p></td><td valign="top"><p class="bodytext">Equivalent radial load including application service factor for determining the load point in the limiting load diagram</p></td></tr><tr><td valign="top"><p class="bodytext">F<sub>radZ</sub></p></td><td valign="top"><p class="bodytext">kN</p></td><td valign="top"><p class="bodytext">Radial load from gearing circumferential force</p></td></tr><tr><td nowrap="true" valign="top"><p class="bodytext">F<sub>rad max</sub></p></td><td valign="top"><p class="bodytext">kN</p></td><td valign="top"><p class="bodytext">Limit value for checking frictional contact</p></td></tr><tr><td valign="top"><p class="bodytext">F<sub>sp</sub></p></td><td valign="top"><p class="bodytext">kN</p></td><td valign="top"><p class="bodytext">Initial preload on bolt</p></td></tr><tr><td valign="top"><p class="bodytext">F<sub>z</sub></p></td><td valign="top"><p class="bodytext">kN</p></td><td valign="top"><p class="bodytext">Available tooth force</p></td></tr><tr><td valign="top"><p class="bodytext">f<sub>z norm</sub></p></td><td valign="top"><p class="bodytext">kN</p></td><td valign="top"><p class="bodytext">Permissible gearing circumferential force for tooth base fatigue strength</p></td></tr><tr><td valign="top"><p class="bodytext">f<sub>z max</sub></p></td><td valign="top"><p class="bodytext">kN</p></td><td valign="top"><p class="bodytext">Maximum permissible gearing circumferential force against overload fracture</p></td></tr><tr><td valign="top"><p class="bodytext">G</p></td><td valign="top"><p class="bodytext">kg</p></td><td valign="top"><p class="bodytext">Mass (weight)</p></td></tr><tr><td valign="top"><p class="bodytext">H</p></td><td valign="top"><p class="bodytext">mm</p></td><td valign="top"><p class="bodytext">Overall height of Slewing Ring</p></td></tr><tr><td valign="top"><p class="bodytext">i</p></td><td valign="top"><p class="bodytext">—</p></td><td valign="top"><p class="bodytext">Gear ratio</p></td></tr><tr><td valign="top"><p class="bodytext">m</p></td><td valign="top"><p class="bodytext">mm</p></td><td valign="top"><p class="bodytext">Module</p></td></tr><tr><td valign="top"><p class="bodytext">M<sub>k</sub></p></td><td valign="top"><p class="bodytext">kNm</p></td><td valign="top"><p class="bodytext">Tilting moment, including all occurring impact loads and required safety factors, calculated from all axial and radial forces that cause the tilting effect</p></td></tr><tr><td valign="top"><p class="bodytext">M<sub>kD</sub></p></td><td valign="top"><p class="bodytext">kNm</p></td><td valign="top"><p class="bodytext">Equivalent tilting moment including application service factor for determining the load point in the limiting load diagram</p></td></tr><tr><td valign="top"><p class="bodytext">M<sub>W</sub></p></td><td valign="top"><p class="bodytext">Nm</p></td><td valign="top"><p class="bodytext">Friction torque of the Slewing Ring under operating load in the installed state</p></td></tr><tr><td valign="top"><p class="bodytext">M<sub>WA</sub></p></td><td valign="top"><p class="bodytext">Nm</p></td><td valign="top"><p class="bodytext">Friction torque of the Slewing Ring, unloaded</p></td></tr><tr><td valign="top"><p class="bodytext">n</p></td><td valign="top"><p class="bodytext">rpm</p></td><td valign="top"><p class="bodytext">Rotational speed of Slewing Ring</p></td></tr><tr><td valign="top"><p class="bodytext">n<sub>b</sub></p></td><td valign="top"><p class="bodytext">—</p></td><td valign="top"><p class="bodytext">Number of mounting holes per bearing ring</p></td></tr><tr><td valign="top"><p class="bodytext">n<sub>max</sub></p></td><td valign="top"><p class="bodytext">rpm</p></td><td valign="top"><p class="bodytext">Maximum rotational speed of Slewing Ring</p></td></tr><tr><td valign="top"><p class="bodytext">n<sub>perm</sub></p></td><td valign="top"><p class="bodytext">rpm</p></td><td valign="top"><p class="bodytext">Permissible rotational speed of Slewing Ring</p></td></tr><tr><td valign="top"><p class="bodytext">S<sub>0</sub></p></td><td valign="top"><p class="bodytext">—</p></td><td valign="top"><p class="bodytext">Required static raceway safety</p></td></tr><tr><td valign="top"><p class="bodytext">S<sub>0rad</sub></p></td><td valign="top"><p class="bodytext">—</p></td><td valign="top"><p class="bodytext">Existing static safety of radial raceway</p></td></tr><tr><td valign="top"><p class="bodytext">SF</p></td><td valign="top"><p class="bodytext">—</p></td><td valign="top"><p class="bodytext">Safety factor against tooth base fracture</p></td></tr><tr><td valign="top"><p class="bodytext">x<sub>1</sub></p></td><td valign="top"><p class="bodytext">—</p></td><td valign="top"><p class="bodytext">Pinion addendum modification coefficient</p></td></tr><tr><td valign="top"><p class="bodytext">x<sub>2</sub></p></td><td valign="top"><p class="bodytext">—</p></td><td valign="top"><p class="bodytext">Slewing Ring addendum modification coefficient</p></td></tr><tr><td valign="top"><p class="bodytext">z<sub>1</sub></p></td><td valign="top"><p class="bodytext">—</p></td><td valign="top"><p class="bodytext">Number of pinion teeth</p></td></tr><tr><td valign="top"><p class="bodytext">z<sub>2</sub></p></td><td valign="top"><p class="bodytext">—</p></td><td valign="top"><p class="bodytext">Number of Slewing Ring teeth (wheel)</p></td></tr><tr><td valign="top"><p class="bodytext">α<sub>A</sub></p></td><td valign="top"><p class="bodytext">—</p></td><td valign="top"><p class="bodytext">Bolt tightening factor</p></td></tr><tr><td valign="top"><p class="bodytext">δ<sub>f</sub></p></td><td valign="top"><p class="bodytext">mm</p></td><td valign="top"><p class="bodytext">Circumferential backlash of gearing</p></td></tr><tr><td valign="top"><p class="bodytext">δ<sub>k</sub></p></td><td valign="top"><p class="bodytext">mm</p></td><td valign="top"><p class="bodytext">Tilting clearance increase</p></td></tr><tr><td valign="top"><p class="bodytext">δ<sub>k perm</sub></p></td><td valign="top"><p class="bodytext">mm</p></td><td valign="top"><p class="bodytext">Maximum permissible tilting clearance increase</p></td></tr><tr><td valign="top"><p class="bodytext">δ<sub>p</sub></p></td><td valign="top"><p class="bodytext">mm</p></td><td valign="top"><p class="bodytext">Maximum permissible flatness deviation</p></td></tr><tr><td valign="top"><p class="bodytext">δ<sub>v</sub></p></td><td valign="top"><p class="bodytext">mm</p></td><td valign="top"><p class="bodytext">Maximum permissible deformation of mounting structure</p></td></tr><tr><td valign="top"><p class="bodytext">δ<sub>w</sub></p></td><td valign="top"><p class="bodytext">mm</p></td><td valign="top"><p class="bodytext">Maximum permissible perpendicularity deviation</p></td></tr></tbody></table><!--TYPO3SEARCH_end-->
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