Single row four-point contact ball type selection calculation：

Single row four-point contact ball slewing bearing type selection calculation according to the bearing Angle 45 ° and 60 ° respectively two kinds of situation.

Select type according to static condition.：

Ⅰα=60°                 Ⅱα=45°

Fa’=（Fa+5.046Fr）fs     Fa’=(1.225Fa+2.676Fr)fs

M’=Mfs                   M’=1.225Mfs

According to dynamic condition check life.：

Ⅰα=60°                 Ⅱα=45°

Fa’=（Fa+5.046Fr）fd    Fa’=(1.225Fa+2.676Fr)fd

M’=Mfd                   M’=1.225Mfd

Then find the above two points on the load-bearing curve, one of which is below the curve.

The calculation of double displacement ball type selection.：

Select type according to static condition：

Fa’=Fafs

M’=Mfs

According to dynamic condition check life：

Fa’=Fafd

M’=Mfd

Single row cross roller type selection calculation：

Select type according to static condition：

Fa’=(Fa+2.05Fr)fs

M’=Mfs

According to dynamic condition check life：

Fa’=(Fa+2.05Fr)fd

M’=Mfd

Three row roller type selection calculation：

In the calculation of three row roller type rotary support, the radial force Fr is assumed to be borne by the radial roller, and only the effect of the axial rolling load and the overturning moment is calculated

Select type according to static condition：

Fa’=Fafs

M’=Mfs

According to dynamic condition check life：

Fa’=Fafd

M’=Mfd