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When detection of chromium steel and stainless steel as the virtues of the NSK bearing material and found that they not only have rust. NSK bearings chrome steel is the most common material. It is harder than stainless steel, so longer. At higher temperatures, however, its performance is not good.
120C high temperature, it will great deformation, load decreases. 150C high temperature it can endure, but moments 150C or higher temperatures will reduce bearing life. Heat treatment bearings are subjected to instantaneous 170C high temperature.
Bearing lubrication in order to reduce internal friction bearings and friction losses, preventing the burning stick, the lubrication effectiveness is as follows.
⑴. reduced friction and friction losses.
Forming the NSK bearing rings and rolling elements and cage of mutual contacts to prevent metal contact, reducing friction and wear.
⑵. extension of fatigue life.
Fatigue life of rolling bearings, rotating, rolling contact surfaces lubricated well, is extended. In contrast, low oil viscosity, oil film thickness is not good, is shortened.
⑶. draining friction heat, cooling
Circulating oil discharges can be used, such as the oil law by friction heat, or by an external heat coming from cooling. Prevent bearing overheating to prevent ageing of the oil itself.
⑷.
Also to prevent foreign bodies penetrated bearing, or prevent rust, corrosion effects.
Methods of lubrication:
Methods of lubrication of the bearing, divided into grease lubrication and oil lubrication. For NSK bearing play function very well, first of all, to select suitable for conditions of use, use of methods of lubrication. If only lubrication, oil lubrication of lubrication-dominated. However, grease lubrication can be simplified bearing structure like that around, compare the advantages and disadvantages of grease lubrication and oil lubrication.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7208BDF NSK | 40 | 80 | 18 |
| 7208ADF NSK | 40 | 80 | 18 |