We can provide free samples . Please contact Email for any inquiries

Fatigue life
NTN rolling bearing in operation, under some load, even if it is a static load, but the ball and raceway, stress is the move in circles, the material will produce rolling fatigue as a result of the NTN bearings to life. The phenomenon is a part of the rolling surface materials like fish scales fall off, this phenomenon is known as fatigue spalling (Flaking).
Noise in life
The household appliances NTN bearing, NTN bearing load is very small, NTN bearing life is very long. But the NTN bearings running after a period of time, will produce wear, vibration and noise increases, grease deterioration etc.. Due to the strict requirements for household electrical appliances NTN bearing noise, when the NTN bearing noise exceeds the allowable range, that NTN bearings has been unable to continue to use. The total time of NTN bearing low noise operation called NTN bearing noise life.
Lubrication life
Household appliances NTN bearings generally use grease lubrication maintenance free sealed bearings NTN. Although the NTN bearing lubrication only need to trace the lubricant, but run a long time due to deterioration of grease and leakage, NTN lubrication of bearings, so that the NTN bearing failure. The total running time of NTN bearing good lubrication condition called NTN bearing life.
For light load NTN bearings, NTN bearing noise life and lubrication life shorter than the fatigue life of NTN bearing. The use of electrical appliances such as home as long as the NTN bearing, NTN bearing selection and installation is correct, and can fully meet the requirements of the lifetime of the host matching.