Indexable face groove holders are listed with a minimum face groove diameter (DAXN) and a maximum face groove diameter (DAXX). These two measurements indicate the diameter range for the initial plunge to keep the curved blade of the cutter from interfering with the edges of the groove when entering the workpiece. The blades of these face groove tools provide added support under the insert to give the holder the rigidity needed to eliminate chattering and vibrations from occurring. These blades are designed with a curved side to follow the initial groove into the workpiece without contacting the edges of the groove.
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With replaceable head face grooving systems, the blades are interchangeable with the holder allowing the operator to easily replace a damaged blade or switch out sizes without removing the holder from the machine. With these systems, the blade is what will determine the groove width, maximum depth, and diameter ranges that can be achieved.
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To view an example of this, the diagram on the right features a KGDFR-80-2A-C blade with a 2mm groove width (CW). This holder has a minimum listed face groove diameter (DAXN) of 80mm and a maximum face groove diameter (DAXX) of 100mm. A starting groove diameter larger than 100mm or smaller than 80mm will cause interference with the curvature of the blade inside the cut during the initial plunge. This interference can be catastrophic to the blade, insert, and workpiece.
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