844 d / 844 dk 德国马尔塞规

·                                用于快速测量孔的直径,圆度和锥度.

·                                尤其适合检测大批量公差登级要求较高的零件.

·                                无需在孔内摇动寻找回转点.

·                                特别适合与数显指示表连接,进行进一步数据处理.

·                                测头带淬硬镀铬导柱,硬质合金测砧.

·                                硬质合金移动针将径向动直接传递给指示表.

·                                内置弹簧提供恒定的测量力,消除人为误差.

·                                测头,夹持套,深度延长杆,直角附件和深度档块组成整个测量系统.

·                                精度：

·                                回程误差   ≤0.4um

·                                重复性误差 ≤1um

·                                线性误差   ≤1％

·                                线性误差844DKs＞16mm≤2％