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Lubrication for INA Bearing, in particular the fatigue life of the rolling bearing and friction, wear, temperature, vibration, etc. have a major impact. No normal lubrication, the bearing will not work. INA bearings causes of damage showed that about 40% of the bearing damage are related with poor lubrication. Therefore, INA bearings well lubricated bearing is to reduce friction and wear of effective measures.
In addition, INA bearing lubrication and cooling, rust, sealing, ease the impact and other effects.
INA bearing lubrication effects can be briefly described as follows
a. the two rolling surface contact with each other or form a film between the sliding surfaces of the second surface spaced from the contact surface to reduce friction and wear.
b. using oil lubrication, especially the use of circulating oil lubrication, oil mist lubrication and injection lubrication, the lubricant inside the bearing can take away most of frictional heat, serve as an effective heat sink.
c. lubricated with grease, you can prevent external dust and other foreign matter into the bearing and sealing effect.
d. lubricant has to prevent metal corrosion effect.
e. extend INA bearing fatigue life.
1, on the mounting surface and installation site requirements
If there is iron bearing, burrs, dust and other foreign matter entering the bearing will generate noise and vibration during operation, and may even damage the raceway and rolling elements. So, before installing the bearing, you must ensure that the mounting surface and installation environment clean.
2, the bearing must be cleaned before installation
Bearing surface is coated with anti-rust oil, you must use clean gasoline or kerosene carefully cleaned, and then coated with a clean high-quality or high-temperature grease before installation. Cleanliness for INA Bearing life and vibration noise is very large. But we want to remind you is: do not be fully enclosed bearing cleaning refueling.
3, the choice of grease
INA bearings lubricated for life of the operation and there is a very important influence, here to brief you choose the general principles of grease. Grease from the base oil, thickener and additives made of different types and different brands of the same type of grease performance varied widely, allowing different rotation limit, the choice is important to note. The performance of the grease base oil, typically in a low viscosity base oil for low temperature, high speed, high viscosity suitable for high temperature, high load. Between the lubrication performance thickeners, grease thickeners water determines the water resistance. In principle, you can not mix greases of different brands, and even the same kind of grease thickener, also due to the different additives adversely affect each other.
4, add oil
Lubricated bearings, oil coated the better, this is a common misconception. INA bearings and bearing interior too much oil will cause excessive oil mixing, resulting in extremely high temperatures. Filling amount of lubricant to the bearing within the bearing space filled with 1/2 to 1/3 is appropriate, high-speed should be reduced to 1/3.
5, the bearing mounting and dismounting
When installed directly face hammer INA bearings and non-stress surface should be compact, sleeve or other installation tool so that the bearing force evenly, do not pass through the rolling power installation. If the mounting surface is coated with oil, will make the installation more smoothly. Such as interference with the larger bearing into the mineral oil should be heated to 80 ~ 90 ℃ soon as possible after installation, and strictly control the oil temperature does not exceed 100 ℃, in order to prevent tempering effect of reducing the hardness and impact dimensions recovery. When removing the difficulties, it is recommended that you use the removal tool pull the inner ring carefully poured hot oil, heat causes the bearing inner ring expansion, making it easier to fall off.
6, the choice of the bearing radial clearance
Not all INA bearings require minimal clearance work, you must choose the appropriate clearance conditions. GB 4604-93, the bearing radial clearance is divided into five groups Group 2, 0, group 3, group 4 and group 5, clearance value of the order from small to big, where 0 is the standard clearance group. Basic radial clearance group for general operating conditions, temperature, and commonly used conventional interference fit; in high temperature, high speed, low noise, low friction work under special conditions such as shaft Chengze Yi large selection of radial clearance; right precision spindle, machine tool spindle bearings INA should use a smaller radial clearance; roller bearings can be maintained for a small amount of clearance work. In addition, separate bearings are indifferent clearance; Finally, the bearing clearance work after installation, pre-installation of the original than the clearance is small, because the bearings to withstand a certain load rotation, as well as load bearing fits and the resulting elastic deformation.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7909CDB NSK | 45 | 68 | 12 |
| 7909A5DB NSK | 45 | 68 | 12 |