In order to ensure the length dimension of the workpiece end face during the batch turning of the workpiece on the lathe, in addition to the use of the external retaining iron to limit the longitudinal position of the turning tool, it is necessary to use the inner retaining iron to define the axial direction of the workpiece. The following describes an internal retaining iron-combined adjustable retaining iron, which has reliable positioning, simple structure, convenient adjustment and large application range, especially suitable for fine workpiece positioning.
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