| 摘要 |
PROBLEM TO BE SOLVED: To provide a device for manufacturing rolling elements without magnetizing the elements which are workpieces by a leak magnetic field. SOLUTION: This device for manufacturing rolling elements 10 comprises an electromagnetic drive unit 16 and an alternating current power supply 20 for supplying drive electric power to the unit 16. The power supply 20 is connected with the unit 16 via a TRIAC 22.
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