Double row ball slewing bearing has three seat ring, the steel ball and the spacing block can bedirectly arrange into the upper and lower races, two rows of upper and lower steel balls with differentdiameter are fitted according to the stress condition.
This kind of open assembly is very convenient, for the upper and lower bear raceway arc angles is90°,which can bear large axial forces and tilting moment. When the radial force is greater than 0.1 times the axial force need to be specially designed the raceway.
Double row different ball slewing bearing’s axial and radial size are relatively large and solid instructure, so it is specially suitable for the medium diameter tower cranes, truck mounted cranes etc.loading and unloading machinery.
Note:
1.n1 is the number of lubricating holes.Oil cup M10x 1JB/T7940.1~JB/T7940.2.The Oil nipple's locationcan be changed according to the user's application.
2.n-Φ can be changed to tapped hole,the diameter of tapped hole is M,depth is 2M.
3.The tangential tooth force in the form is the maximum tooth force,the nominal tangential tooth force is1/2 of the max one.
4. "K" is addendum reduction coefficient.
