| 摘要 |
PROBLEM TO BE SOLVED: To give high wear resistance and good lubrication to the sliding surfaces of sliding parts of a sawing machine, to avoid abrasion, sticking or the like of the sliding surfaces without feeding a lubricating oil to the sliding areas of the parts and to enable a high-speed sawing machine to which it is unnecessary to feed oil. SOLUTION: A composite film consisting of a CrN ceramic layer and, on top of it, a WC/C layer is formed on the surface of a feeding-needle driving link-pin 60, which is one part of sliding parts consisting of the needle driving link-pin 60 and a needle driving link 61, to give high wear resistance and lubrication to a sliding surface of a sliding part.
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