我厂生产的表型千分表,其读数的准确度是取决于其中的两个小模数齿轴(一个16齿和一个10齿的)的加工精度,特别是它的渐开线齿廓,必须完整无缺,始能保证齿轴与齿条的正确啮合。齿轴的主要数据如下: 模数 M= 0.199,压力角α=20°,分度圆齿距t=0.625公厘。 16齿齿轴向标准齿,外径D= The accuracy of the readings of the micrometer I produced in our factory depends on the machining precision of two small module gears (one 16 tooth and one 10 tooth), especially its involute tooth profile , Must be intact, to ensure the correct engagement of the pinion and rack. The main data of the pinion are as follows: Modulus M = 0.199, pressure angle α = 20 °, indexing pitch t = 0.625 mm. 16 tooth standard axial tooth, the outer diameter D =