Exclusive North American distributor for Gamet Bearing.Koyo Technical InformationThis information is provided courtesy and permission of Koyo. All rights are reserved.Types of rolling bearings and characteristicsAngular contact ball bearingsOutline of bearing selectionBearing arrangementsArrangement in which fixed and free sides are distinguishedArrangement in which fixed and free sides are not distinguishedApplication to vertical shaftsGear transmission two-point-support systemBearing service life and selectionBasic dynamic load ratingSelection based on service lifeBasic static load rating and safety coefficientTolerances for bearingsTolerancesLimiting speedLimiting speed of bearingsCorrection of limiting speedConsideration for high speedFriction coefficient of bearingsPassing vibration frequencyFitsPurpose and selectionLoad characteristicsLoad magnitudeSurface roughnessTemperatureMaximum stress of bearingInternal clearanceInternal clearance of bearingOperating clearanceClearance specificationsRecommended internal clearancePreloadPurpose and method of preloadAmount of preload — Matched pair angular contact ball bearingsb.1. S: slight preloadb.2. L: light preloadb.3. M: medium preloadb.4. H: heavy preloadLubricationGrease lubricationOil lubricationb.1. Lubricating oilb.2. Kinematic viscosityb.3. Lubrication methodsMaterialsOuter/Inner ring and rolling element materialsa.1. High carbon chromium bearing steela.2. Case hardened steela.3. Other materialsMaterials used for cagesHandling of bearingsGeneral instructionsa.1. Mounting methodsa.2. Press fit of bearings with cylindrical bore bearingsa.3. Shrink fit of bearings with cylindrical bore bearingsTest runMaintenance and checkingChecking of bearingsBearing failures and countermeasuresFlakingCracking, ChippingBrinelling, NicksPear skin, DiscolorationScratch, ScuffingSmearingRust, CorrosionElectric pittingWearFrettingCreepingDamage to RetainerSeizure