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钟表零件承受最大的峰荷并不是在使用过程中,而是在制造过程中。例如,轴颈、联轴齿轮和小轴的最大变形危险,是在自动机床上加工时在切削工具压力作用下产生的。在钟表生产中,高的生产率必须与高的制造密度相结合:极重要零件的表面粗糙度Ra≥0.16～0.20微米。此外,按照钟表的工作条件,钟表零件在热处理后应具有高的耐磨性,且几何尺寸不应发生变化。因此,钟表零件必须选用不仅有足够的强度,而且容易加工的材料来制造。制造钟表时,广泛应用具有良好的表面精加工质量的易切削碳素钢和不锈钢棒材。
Watch parts to withstand the peak load is not in use, but in the manufacturing process. For example, the maximum deformation risk of journals, coupling gears and small shafts is created by the pressure of the cutting tool when machining on an automatic machine. In watchmaking, high productivity must be combined with a high manufacturing density: Very important parts have a surface roughness of Ra ≧ 0.16-0.20 μm. In addition, watch parts in accordance with the working conditions, watch parts after heat treatment should have high wear resistance, and geometric dimensions should not change. Therefore, watch parts must be selected not only have sufficient strength, but also easy to process materials to manufacture. When making watches, there is a wide range of free-cutting carbon steel and stainless steel bars with good finish quality.