The Perfect Oilless SGO
Frictional heat Q generated per unit time and unit area is indicated as below.
Frictional heat is mainly affected by speed rather than contact pressure. Therefore, for simillar PV values, additional lubrication should be considered for a higher velocity application to prevent seizure to the bearing or the mating shaft.
|Type||Shaft material||Hardness||Shaft roughness|
|General purpose||General structural steel wiht SM35C or above||Higher strength material is recommended, when foreign substance flows in
Rockwell "C" 35 or above
|High temperature||Stainless steel or chrome plating|
|Corrosive environment||Chrome plating|
It is ideal to chamfer the both ends of the oil-less bearing in order to prevent stress concentration.
|80 ~ 200||1.0C|
Thickness of standard bearing is calculated using the formula below.