1, according to the power transmitted by the shaft, using the formula T = 9550 * p / n to calculate the torque transmitted.
2, according to the torque, using the torsional shear stress formula to initially estimate the diameter of the shaft.
3, according to the size of the gears on the shaft, the assembly program adopted, selected bearings, and a good preliminary structural design.
4, now start to calibrate the shaft, if it is a general rotary shaft, use the bending and torsion synthesis formula for calibration. If it is a mandrel, use the bending formula to check, if it is a drive shaft, generally do not need to check.
5, the use of mechanical parts strength theory of the shaft for accurate calibration. Determine the various impact coefficients. Finally, if the strength to meet, generally do not modify, strength does not meet, redesign can be. Formula, you can refer to the mechanics of materials or mechanical design textbooks. Shaft material is generally selected 40CR.