Measurement of the center diameter of the circular arc groove in the hole

When processing the circular arc groove d in the outer ring of the slewing ring as shown in Fig. 1, since the annular oil groove is extremely difficult to measure in the middle of the circular arc groove d, the dimension D_0 is difficult to ensure during the turning process, and the workpiece repair rate and scrap rate are high. Both are very high. Through work practice, we have explored a set of more scientific measurement methods, which is time-saving and convenient, and is very popular among operators. When turning, first strictly control the size of the hole diameter D_1, and then put it into a standard steel ball with a diameter of 20mm during the measurement.

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