| 摘要 |
PROBLEM TO BE SOLVED: To provide a dimension measuring device for a cylindrical workpiece capable of acquiring quickly and accurately at suppressed cost, each external diameter dimension of a large diameter part and a small diameter part of the cylindrical workpiece having the large diameter part on one end and the small diameter part on the other end.SOLUTION: This dimension measuring device 100 for the cylindrical workpiece W having the large diameter part 2 on one end and the small diameter part 3 on the other end is provided with: a pair of positioning bars 51, 51 provided so as to abut on the outer circumferential surface of the large diameter part 2 of the cylindrical workpiece W, and extending along tangent lines 1, 1 of the outer circumferential surface of the large diameter part 2 respectively; a first measuring part for measuring a distance from a reference axis P to the outer circumferential surface of the large diameter part 2, by using as the reference axis P, an axis parallel to a center axis O of the cylindrical workpiece W passing an intersection of the tangent lines 1, 1; and a second measuring part for measuring a diatance from the P reference axis to the outer circumferential surface of the small diameter part 3. |
