To provide a rolling tool capable of accurately and economically manufacturing a screw thread in a shape of capable of exhibiting a locking function.
A rolling die 1 is provided with a second die 20 having a plurality of fitting part working teeth 22 and a slit working tooth 23 arranged between the plurality of the fitting part working teeth 22, and a first die 10 having a start end coincident with a rolling direction terminal end of the second die 20 and having a screw thread working tooth 12. The one slit working tooth 23 (a head part 52 side of a locking bolt 51) of the slit working teeth 23 adjacent to the fitting part working tooth 22 is disposed nearer to the fitting part working tooth 22 than the other slit working tooth 23. Accordingly, a rolled material 61 is rolled by the second die 20, and then, is rolled by the first die 10, and thereby, the locking bolt 51 having a slit groove 57 on a flank surface can be rolled.
WATANABE YOSHITAKA
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