The amount of lubricating oil (grease) in the bearing is insufficient or excessive, the quality is poor, and there are debris, iron pins and other debris: The sliding bearing sometimes does not rotate due to the damage of the oil, and the bearing cannot be brought into the oil to cause the bearing to heat up.
Inani lamafutha okugcoba (igrisi) ekuphakameni alanele noma ngokweqile, ikhwalithi ayiyinhle, futhi kukhona imfucumfucu, izikhonkwane zensimbi nezinye izinsalela: Ukuthwala okushelelayo kwesinye isikhathi akuphenduki ngenxa yomonakalo kawoyela, futhi ukuthwala akukwazi ukulethwa emafutheni ukwenza ukushisa kushise.