Assessment for Measurement Uncertainty of Helix Master Helix Angle

The measurement methods and the computing formulas of standard gear helix master helix angle are analyzed,on these basis the source and assessing method of uncertainty in measurement helix angle are particularly dissertated.By the means of experimental data,assessing method of uncertainty in measurement of standard gear helix master helix angle is analyzed.Researching conclusion indicates that the assessing method is of maneuverability in practice.