After turning the workpiece shown in Figure 1, we quenched and re-grinded the φ60js6 outer circle and the two φ42N7 bores, resulting in high reject rate. To this end, we designed a center-mounted grinding fixture on the M1432A cylindrical grinding machine (Fig. 2). The coaxiality pass rate is 100%. The specific usage is as follows: Fix the fixture to the machine and adjust the middle of the fixture hole and the headstock
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