By way of improving the superfinishing process,the appearance quality and surface roughness of steel balls,together with the productivity,were increased.

通过改进超工工艺及工过程,提高了钢球的外观质量和表面粗糙度及生产效,使该类轴承的性能和寿命有了进一步的提高。

Taking the superfinishing of thin-wall hole machining as an example, the design and application of combined carbide core drill and reamer are introduced.

以本厂簿壁孔工，绍了硬质合金扩铰复合刀具的设计、结构参数、使用情况及应用效果。