TIMKEN deep groove ball bearings use grease must attention to the problem of clearance

Bearing clearance namely bearing in the bearing box mounted on shafts or not, will it a fixed housing, then the party has not been fixed do radial or axial movement of the mobile. Therefore, the resulting measured values than real clearance ( Called the theory of clearance) Big, that is, to increase the measuring load produced by the elastic deformation. But for the roller bearings, deep groove ball bearings due to the elastic deformation is small, can be neglected. Before the installation of bearing internal clearance is generally expressed in the theory of clearance. Bearing lubrication is to use the rolling surface of relative movement between oil film will be separated from each other, not excessive wear and failure as a result of rough contacts. If users can attach great importance to the TIMKEN bearing lubrication technology, can guarantee during the working life of the to, still can maintain the stable performance and rotation accuracy. Rotate the outer ring and flush the cage carefully, the rolling element and raceway border, the need to thoroughly clean the oil residue any part of it that was previously hidden. The bearing should be attached to rinse friendly dry cleaning, dry clean lined with neutral table support, or in the far infrared drying oven is slow. If the dry cleaning friendly dry or drying, the process should not take bearing ring, adhere to any frame or roller. Oil bearing in practice can be removed prior to the delivery test of oil seal, and immersed in acid free 3% kerosene or gasoline to clean. The first is the viscosity of the grease TIMKEN bearing deep groove ball bearing grease is usually make a similar viscosity or apparent viscosity, said when, on the viscosity of grease must specify the temperature and shear rate. Similar viscosity index can be used to control the low temperature fluidity and pumping. Second, low temperature fluidity of the TIMKEN bearing grease measure of deep groove ball bearing grease performance at low temperature is one of the important index of low temperature torque, namely at low temperature ( - 20 ° c below) Grease block bearing rotational degree of low speed flows, the low temperature torque of the grease by the starting torque and rotation torque after 60 mm average said. The third is the evaporation of TIMKEN bearing grease the evaporative (deep groove ball bearing grease C) Said in the long-term use under condition of high temperature grease, grease oil volatilization, evaporative as small as possible. The evaporative mainly depends on the nature of the lubricating oil and fat fractions. The fourth is the TIMKEN bearing grease the oxidation stability of oxidation stability refers to the grease in long-term storage or long-term under high temperature when using the role of resistance to heat and oxygen, permanent changes in their ability to maintain its nature will not occur. Due to oxidation, are often free alkali content reduced or free organic acid content increases, drop point drop, dark appearance, appear different smell, consistency, ultimate strength, similar viscosity decreased, generated corrosive product and destroy the material of grease, soap oil separation. In long-term storage of grease, therefore, should be stored in dry and ventilated environment, prevent sun, and shall regularly check free base or free change of the project such as organic acid, corrosion resistance, to ensure its quality and performance. Fifth, TIMKEN bearing grease the thixotropy of deep groove ball bearing grease is the most basic features, is the thixotropy. When applying an external force, the flow of the grease in gradually become soft, the apparent viscosity decreased, but when at rest, after a period of time ( A very short) Again, the consistency ( Restore) This feature is called thixotropy. Decides the characteristics of grease, it can be at the site of the is not suitable for lubricating oil lubrication, and showed its excellent performance. Bearing inspection is immediately after the completion of delivery or rust counting process, seize the completion of the inspection process should be as far as possible don't last long due to corrosion. Pay attention to the pure gasoline use clean oil, also can cause corrosion. Deep groove ball bearing lubrication is divided into grease lubrication and oil lubrication, grease lubrication facilities of the method is simple, the grease is not easy to leak, have certain waterproof, gas and other impurities into the bearing ability, therefore usually grease lubrication is widely used. Such as overloading, high speed, high temperature working condition of oil lubrication.