685 ZZ Minature Deep Groove Ball Bearing 5*11*3mm Chrome Steel SUNBEARING

685 ZZ Minature Deep Groove Ball Bearing 5*11*3mm Chrome Steel SUNBEARING Product Specification Bore diameter:  5 mm Basic dynamic load rating 0,715 kN Outside diameter: 11 mm Basic static load rating 0,281 kN Overall width:  3 mm (Grease) Lubrication Speed 45 000 r/min Rows of Balls Single (Oil) Lubrication Speed  53 000 r/min Outer ring type: Unsplit Load Direction Radial Radial clearance class CN (Standard) Mass 0,0012 Kg Closure type: ZZ Precision Grade 0 Material Chrome Steel r min 0,15 mm Cage Material Sheet Steel da min 6,2 mm Type of lubrication: Grease Lubrication Da max 9,8 mm 685 Bearing Short Description Miniature ball bearing with smallest dimensions Suitable for high radial loads and light axial loads in both directions Suitable for high running accuracy, quiet running, and very high speeds Seal: contact lip cover on both sides made of metal (ZZ) for high sealing effect 685 bearing has good fixed bearing property, but can also be used as a floating bearing, each in both directions Reasons for The Failure of Miniature Bearings About 40% of the failures of ball miniature bearings are caused by dust, dirt, debris contamination, and corrosion. Pollution is usually caused by incorrect use and poor use environment. Therefore, it can also cause torque and noise problems. However, miniature bearing failure caused by environment and pollution can be prevented. And the cause of such failure can be determined through simple visual observation. As long as the use and installation are reasonable, the erosion of miniature bearings is easy to avoid. Therefore, the feature of erosion is that there are indentations on the raceway of the miniature bearing ring caused by impact load or incorrect installation. Erosion usually occurs when the load exceeds the yield limit of the material. If the installation is not correct so that a certain load traverses the miniature bearing ring, corrosion will also occur.