PROBLEM TO BE SOLVED: To provide a grinding apparatus which superfinishes a workpiece without restricting its length or size.;SOLUTION: In the grinding apparatus for superfinishing a rail ball rolling groove, a first rod is connected to a drive rod, a follower rod, and a grinding tool holder turnably around a first shaft 43a, a second shaft 43b, and a third shaft 54a, respectively, and a second rod is connected to the drive rod, the follower rod, and the grinding tool holder rotatably around a fourth shaft 44, a fifth shaft 44b, and a sixth shaft 54b, respectively. The drive rod oscillates together with an oscillation transmission shaft 23, and the follower rod oscillates together with a follower rod support shaft 33. The distance between an axis C11 of the oscillation transmission shaft and an axis C12 of the first shaft and the distance between the axis of the oscillation transmission shaft and an axis C13 of the fourth shaft are equal to the distance between an axis C21 of the follower rod support shaft and an axis C22 of the second shaft and the distance between the axis of the follower rod support shaft and an axis C23 of the fifth axis, respectively. The distance between the axis of the oscillation transmission shaft and the axis of the follower rod support shaft is equal to the distance between the first shaft and the second shaft.;COPYRIGHT: (C)2010,JPO&INPIT
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