What is the formula for calculating the 2nd critical speed of a demo rotor like Jeffcott rotorFor example the 2nd critical speed of just a shaft of uniform diameter ... Learn More ball mill rotating speed …

formula for critical speed of rotation of a ball mill. PE Series Jaw Crusher; ... formula for critical speed of rotation of a ... crusher mass speed rpm . how to calculate the critical speed of rotating drum formula ... Get Price. how to determine the jaw crusher motor speed.