Cracked Inner Bearing Race Defect

cracked inner bearing race defect


Cracked Inner Bearing Race Defect --





















































Cracked Inner Bearing Race Defect



9Misalignment Bent shafts, out-of-square shaft shoulders, out-of-square spacers, out-of-square clamping nuts and improper installation due to loose fits can cause misalignment, which may result in overheating and separator failureWhat to Look for For a tight fit, look for a heavy rolling-element wear path in the bottom of the raceway, overheating or an inner-ring axial crackEverything prior to that last instantaneous fault before crack failure would be deemed as predeterminant I assure you, toss a bearing into a concentrated hydrochloric acid bath and watch how long before it shatters from it's own internal stresses and you'll be convinced


They are usually made of mild steel, bronze, or brass, and can be easily damaged by improper handling or installationInadequate lubrication Inadequate lubrication is the major bearing killerThis would only occur if the bearing was heated for installation, as it would have been most difficult to drive or press the bearing with that much resisitanceAS mentioned elsewhere the fit of shaft to bearing (race) is very important.Fatigue (Spalling) Spalling is often the result of overloading, an excessive preload, tight inner-ring fits and using the bearing beyond its calculated fatigue lifeBut,if bearing is used in such corrosive environment then the shaft, key, rotor etc


Instead the load is concentrated on only some of the rollers or balls and races, potentially leading to fatigueThe surface finishes on races and rolling elements makes them susceptible to corrosion if not adequately protectedThey affect cylindrical, spherical, needle, tapered, and ball bearingsBut do check those things, and compare it to the bearing manufacturer's recommendationsI presume it may have been installed too "tight", but it is still under investigationWhat to Loo