Critical Speed Ball Screw and Lead Screws Formulas and Calculator: The critical speed is the lowest rational speed that a shaft is in resonance. nc= fc( dr/ Lc2) 107 Where: nc= critical speed (rpm) dr= root diameter of screw (mm) fc= factor based on end speed support bearings Lc= u...
Here is how to calculate critical speed, although there is no need to do it now. That is one of the steps in Selecting a Leadscrew: Part 2. You may also use the Critical Speed Calculator . The formula for Critical speed is given below. The value of N is given below or may be ...
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