Proper use of reason of bearing grease fat ring

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Under normal circumstances, the amount of the grease filled in the bearing, always exceeds directly involved in lubrication of the actual requirement of holding the rack and the bearing cover of the cavity, and a contou r is formed in the periphery of the rolling body. In this process, since the excess grease resistance, the bearing temperature rise very fast. Although most of the excess grease is squeezed out at the beginning of the operation, and squeeze the grease in the raceway attachments may still be turning rolling element into the raceway between. These early stages of the bearing, most grease quickly (less than one minute) to be extruded raceway accumulate in Paul grease With the rotation of the bearing body while circulating successively small amount to be discharged. This time bearing Timor degree continues to rise, and until excess grease discharge can be called to the grease go together stage, based on the quality of the grease in the bearing structure, filling amount and other factors, the time may last ten minutes , or even a few hours.
Remaining grease is completely discharged, and the remaining small amount of grease in the rolling element raceway, a mutual contact sur face of the cage, Ji wedge effect to form a thin layer of grease film, thereby entering the normal bearing He stage . Then the temperature was gradually decreased and reached the equilibrium state. In other words, the long-term role in lubrication mainly rely on the layer of grease film to bear. In addition, the process of long-term operation of the bearing, the contours of the rolling element and raceway near cage grease atrophy and ceded part of the base oil flowing into the raceway between lubrication supplement .angular ball bearings
Oil or grease varieties selected not (fit will achieve good results)
Bearing mixed with water, acids, dirt or paint, play a corrosive effect
Bearing seat hole folder flat (housing bore roundness is not good, or housing bore distortions are not straight)
The underside of the imported bearing horn uneven (resulting in deformation of the seat hole even bearing seat cracks)
Bearing hole debris (chips, dust particles and other residues)
The bearing clearance is too small, tight rotation (adapter sleeve tightened too overdone)
Insufficient lubrication (oil level is too low, oil or grease leakage by sealing)
Bearing clearance is too small (with ppropriately)
Seals eccentric (encountered adjacent parts and friction)
The bearings subject to an additional load (subjected to axial limp tight bearing or shaft and two fixed end bearing)
Too loose with bearing and shaft (shaft diameter is too small or tight sets not tighten)
Bearing mixed with sand or carbon particles and other impurities play abrasives role
The smaller the diameter of the housing bore (bearing temperature)
Bearing hole diameter is too large, the actual fit is too loose (bearing temperature - the outer ring slip)
Becomes large bearing hole (ferrous metals bearing hole stretch, or due to thermal expansion becomes large)
Bearing noise (the end face of roller or ball skidding caused)
The shaft s thermal elongation is too large (bearing by the the axial additional load statically indetermte)
The shaft shoulder too large (encountered bearing seals and friction)
Block hole big shoulder block (bearing seals hair badly distort)
Labyrinth seals the gap is too small (friction with the shaft)
Lockwasher teeth bent (encounter bearings and friction)
The dumped oil ring position does not fit (encounter flange cover and friction)
Bearing heat discoloration and deformation (the gun heating demolition bearing caused)bearing catalogue
Shaft is too coarse practical with tight (causing the bearing temperature is too high or the occurrence of noise)
Bearing noise (bearing micro-abrasion)
Indentation (steel ball or roller bearings installed with a hammer caused)
Bearing noise (interference from ou tside the local oscillator)
Comparison for the above reasons, you can generally analyze the specific reason the bearings rattling.