hardness range

Automatic machine tool for turning double end face of the piston pin The hardness range and difference of hardness and grit of the two grinding wheels for unequal double end griding of bearing sealing seat.

车活塞销双端面自动机床通过对砂轮性能的实际检测、质量跟踪及磨削试验，得出轴承密封座双端面不等面磨削所使用砂轮的硬度范围、两侧砂轮的硬度差及砂轮粒度等数据。

The HRC hardness range is from 48.5 to 51. Secondly, according to the drawing of scroll cover, the external permanent-mold is designed to be used to centrifugal casting.

硬度HRC在48.5~51之间。其次，根据螺旋套零件图纸，设计出了适合离心铸造的外层金属型模具，通过添加螺旋套金属型内衬和树脂砂型内衬，用于制造螺旋套。