The machine vice is a very adaptable way of holding items for milling and drilling on the milling machine table, but to be at its most useful, the vice must be accurately in alignment with the table. I am frequently reluctant to disturb my vice in order to use a rotary table or clamps, due to the necessity of replacing it accurately. Yet another workshop gadget was obviously called for to make vice alignment virtually automatic. Why align a vice in the first place? Beginners in engineering may wonder why it is so important that the milling machine vice is attached to the table exactly in line with the table movement. There are various advantages to having the vice aligned to the table ways. If you wish to chamfer or to rebate the edge of a workpiece that is held in the vice, then if it is not in line with the table ways, the chamfer or rebate will vary in size from one end to the other due to the workpiece travelling at an angle to the edge of the workpiece.
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