The purpose of this paper is to investigate the vibration suppression characteristics of ball bearing supplied with nano-copper oxide (CuO) mixed lubricant. CuO nanoparticles were synthesized by chemical method and characterized using XRD and TEM to study the crystallanity and ultrastructure. The synthesized CuO nanoparticles were of the size range 5-8 nm. 0.2%, 0.5%, and 1% (W/V) of CuO nanoparticles was added to the lubricant (ISO VG 68) and was used for further analysis. The test rig setup consists of a ball bearing and loading arrangement operated by a DC motor. The bearing (New, Ball defect and Outer defect) vibrations were measured using base lubricant and CuO lubricant mixture. Our results show a reduction of 41% vibration amplitude while using 0.2% (W/V) CuO nanoparticles in outer case defected compared to base lubricant.
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