| 摘要 |
PROBLEM TO BE SOLVED: To provide a bearing device superior in load capacity and rigidity, thinner and lighter for improved installing efficiency, and suitable, for example, in use for a turning part of a robot arm. SOLUTION: A pair of deep groove ball bearings 11 arranged side by side are each set so that the bearing size is bearing thickness/bearing outer diameter≤0.15, ball diameter/bearing thickness≥0.5, bearing thickness/bearing width>0.5, and (ball diameter×ball number)/(3.14×PCD)≥0.5, where the bearing thickness is (outer diameter-inner diameter)/2. The bearings 11 are filled with such grease that urea as thickener is mixed in base oil consisting of synthetic hydrocarbon oil. COPYRIGHT: (C)2010,JPO&INPIT
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