Recent content by B.delong

The switch temperature will very on a daily basis by about 30C. I have calculated under worst case conditions that the ball’s vibration energy may exert a force of 52 N on the wall during impact at a 4.5e-6 m penetration depth calculated from the Hertzian contact model. This may disrupt the...

Yes the part is very similar to these parts you list. Unfortunately the part is not sealed from atmospheric oxygen. Both the tube and ball are brass but the ball has a nickel plate with a gold flash. The ball rarely hits the contacts so this is not the wear problem area. In the attached...

Fretting Corrosion I am researching a fretting corrosion problem and I am looking for resources on the relative resistance of materials to this phenomenon as the material on this subject seems very limited. The application is a rolling ball switch, which impacts the tube sidewall due to...