The Physikalisch-Technische Bundesanstalt (PTB) has developed new large involute gear measurement artifacts up to 2 m in diameter and corresponding calibration techniques. These can be used to quantify the quality of large gear manufacturing processes for the first time. This fulfills the essential demands from industry which can be traced back to the tremendous growth of wind energy systems during the last few years. The gear measurement artifacts represent different internal and external gears usually used in wind mill gear boxes. Their workpiece-like design allows convenient handling on conventional gear measurement instruments or coordinate measuring machines with or without rotary tables.
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