685 ZZ Minature Deep Groove Ball Bearing 5*11*3mm Chrome Steel SUNBEARINGProduct SpecificationBore diameter:5 mmBasic dynamic load rating0,715 kNOutside diameter:11 mmBasic static load rating0,281 kNOverall width:3 mm(Grease) Lubrication Speed45 000 r/minRows of BallsSingle(Oil) Lubrication Speed53 000 r/minOuter ring type:UnsplitLoad DirectionRadialRadial clearance classCN (Standard)Mass0,0012 KgClosure type:ZZPrecisionGrade 0MaterialChrome Steelr min0,15 mmCage MaterialSheet Steelda min6,2 mmType of lubrication:Grease LubricationDa max9,8 mm685 Bearing Short DescriptionMiniature ball bearing with smallest dimensionsSuitable for high radial loads and light axial loads in both directionsSuitable for high running accuracy, quiet running, and very high speedsSeal: contact lip cover on both sides made of metal (ZZ) for high sealing effect685 bearing has good fixed bearing property, but can also be used as a floating bearing, each in both directionsReasons for The Failure of Miniature BearingsAbout 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. The pressure pits on the miniature bearing ring can also generate noise, vibration, and additional torque.685 Bearing ApplicationMiniature bearings are suitable for various industrial equipment, small rotary motors, and other high-speed and low-noise fields, such as:Office equipment, micro motors, instruments, laser engraving, small clocks, soft drives, pressure rotors, dental drills, hard disk motors, stepping motors, video recorder drums, toy models, computer cooling fans, currency counters, fax machines, and so on related fields.