| 摘要 |
PURPOSE: A manufacturing method of a check valve for spraying cylinder oil is provided to maximize work efficiency by reducing manufacturing time and a number of procedures. CONSTITUTION: A manufacturing method of a check valve for spraying cylinder oil is as follows: a step of forming a groove in one end of a body; a step of forming a stepped pulley in the other end of the body with an end mill and a rimmer; a step of circumferentially caulking multiple caulking parts at a predetermined interval to surround a washer.
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