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TIMKEN bearings both friction and sliding friction. The sliding friction is caused due to deviation TIMKEN bearings surface curve and load bearings deformation. For example, between the body and the ring, due to the ball and the ring is not absolutely rigid body, their contact area is always to produce elastic deformation, in theory, for the point contact or line contact surface contact, and in fact always load working conditions to become point of contact with different diameters with different line speeds resulting in sliding friction. Similarly, a variety of reasons also make the body and keep and maintain sliding friction and between the inner and outer ring. Sliding friction increases with the increase in speed and load, in order to reduce friction, wear, lowering the temperature, noise, to prevent the rusting of the bearings components, the correct selection of lubricants and lubrication, suitable to control the quantity of lubricant TIMKEN bearings life.
1, TIMKEN bearings oil or fat based on:
TIMKEN bearings lubricating advantages:
1) In certain practices, the use of a small lubricant than grease lubrication starting torque and friction losses significantly.
2) play a role in cooling lubricant to take the heat in a loop, so make the bearings to achieve a relatively high rotation speed.
3) to ensure that achieve relatively high operating temperature.
4) change the fat, you must remove the relevant connected components, lubricated with oil, it is no such trouble.
5) TIMKEN bearings in the gear box in the lubricating oil is very appropriate, because the splashing oil at the same time achieve the purpose, while lubricating gears and bearings.
6) the product of TIMKEN bearings, grease gradually product wear, abrasive, from the outside through the seals penetrate the contamination and the product itself aging, if not replaced, then cause the bearings to accelerate wear, the application of liquid lubricant. can be filtered to ensure its proper functioning.
TIMKEN bearings with grease lubrication of advantages:
1) individual TIMKEN bearings point shall be by hand often fuel, such as for fat is not only save trouble and avoid the accident due to lack of oil.
2) fat there is a seal, This allows the sealing institutions to simplify the design.
3) Experience has shown that in a certain speed range (n <20000r/min or dn <20000mm.r/min) lithium base grease lower temperature rise and longer bearings life than to use the drip method.
2, TIMKEN bearings lubrication theory: the bearings lubrication mechanism belongs to the elastohydrodynamic lubrication theory.
3, TIMKEN bearings failure type and lubrication: most failure causes damage to the assembly defective, bad seal. The small number of failures because the wear and tear caused by the lubricant to a lack of or excessive or substandard quality, bonding, corrosion and overheating.
4, the basic characteristics of the grease and the general standard of the choice of grease:
Grease is selected, you must select and use conditions (temperature, speed, load, and the environment, etc.) compatible grease, these are the basic characteristics of the grease, but the basic characteristics depend on the grease thickener and base oil types.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 6311 NSK | 55 | 120 | 29 |
| 6211 NSK | 55 | 100 | 21 |