The traditional clamping method for thin step pin grinding is shown in Figure 1. The ring collet is in the clamping, because the pin-shaped circular contact surface is small (3.5mm), the screw is inconveniently fastened; the tilt is easy, and the pin After grinding one end of the outer diameter of the shaft, the other end of the shaft and the shoulder must be ground by the head clamp. As a result, the phenomenon of turning the grinding head and the production efficiency are low. To this end, I made a slight improvement on the basis of the ring collet, and made a pinch collet suitable for grinding the thin step pin. The structure is shown in Figure 2.
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