Lead Screw Critical Speed Calculator

 This mechanical engineering calculator is used to calculate the critical speed of the lead or power screw to transmit the mechanical power.


Lead Screw Critical Speed Formula:

N = (4.76 × 106) dr CL2


N- speed in RPM

L - length between bearing supports in inches

dr -root or smallest diameter of lead screw in inches

Constant for Steel :

C = 0.36 for one end fixed & one end free

C = 1.00 for both ends simple

C = 1.47 for one end fixed & one end simple

C = 2.23 for both ends fixed