Streng result of deformation

Hi

I tried to simulate turning of a crown wheel in a lath machine. I add 200 rpm in the rotation velocity and add a 1600 N as clamping force.

Do you know why the deformation result is not equal. In the graph you can see that the deformation increasing.

I really appreciate your answers.

In the figure  you can see the force with pink color and rotation with red and fixed point which represent the fixture is green

the result is

Regards

NJ

SolidworksSimulation