| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a screw device capable of detecting the iron powder concentration and the oil content of lubricant fed inside a nut. <P>SOLUTION: A lubricant discharge aperture is provided in the nut 11 or a seal cap 15 and the oil content, and the iron powder concentration of the lubricant discharged outside the nut 11 from this lubricant discharge aperture are measured with an oil content meter 26 and an iron powder densitometer 27. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
