Rough surface with small deposit Scratches between the flanges of rings and the side surfaces of the rollers Possible reasons ·Poor lubrication ·Intrusion of foreign matter ·Skewing rollers caused by leaning ·Axial load too big leading to no lubricant on flange surface ·Roughness of the surface too big ·Big sliding of the rolling elements Solutions ·Re-consider lubricant and lubricating method ·Check application method ·Set proper pre-load ·Reinforce the sealing function ·Use bearings correctly
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