| 摘要 |
PROBLEM TO BE SOLVED: To provide a long life rolling unit that is hard to wear even under the insufficient lubrication environment. SOLUTION: In a thrust needle bearing that provides an inner ring 1, an outer ring 2 and a plurality of rolling bodies 3 arranged between both rings 1, 2 to rolling free, 50 or more particles of the diameter less than 1μm and the hardness more than 8 GPa adhere firmly to every 1 mm<SP>2</SP>of a rolling faces of the rolling bodies 3. COPYRIGHT: (C)2004,JPO&NCIPI |
