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Determination of the viscosity of the bearing components in a standard method GB / T 265, the time of a calibrated glass capillary by gravity, a certain volume of liquid flow. The time and temperature of the capillary viscometer constant flow of the kinematic viscosity of the liquid. The corresponding standard method of determination of kinematic viscosity on foreign oil is the United States, ASTM D445, DIN 51562, Germany and Japan JIS K2283.
The friction material within the flow measurement is the so-called viscosity, in order to prevent contact between the moving parts wear, the bearing must have a sufficient viscosity of the lubricant, the viscosity decreases with increasing temperature. Bearing oil viscosity is an important physical and chemical properties of the assessment of the quality of a production, transport and use, has a very important significance.
The main technical indicators of bearing lubricant viscosity, but the viscosity of the bearing lubricant shall not exceed the degree of influence of the engine is started, the vast majority of oil is based on its viscosity sub-brand bearings, viscosity selection of species is mainly based on oil equipment. The absolute viscosity measuring method is divided into both the viscosity and relative viscosity of the two classes. Absolute viscosity divided into two kinds of dynamic viscosity, kinematic viscosity; the Engler viscosity relative viscosity, Saybolt viscosity and viscosity mine representation. Viscosity is too large, use bearings will increase the oil mechanical wear, in practical applications, select an appropriate viscosity oil products, machinery and equipment, can be guaranteed to work reliably. Typically, the viscosity of the low-speed high-load applications, the use of oil, to ensure adequate oil film thickness and normal lubrication; high-speed, low-load applications, the use of smaller viscosity of the oil, in order to ensure the normal machinery and equipment up and running torque, engine oil viscosity is too large, slow-moving, slow, although the pressure of high oil prices, but by a small amount of oil, does not increase the friction surface, resulting in continuous operation with minimal friction. Bearing oil circulation is slow, the number of oil-bearing small, it is difficult to outlast time, scrap metal, carbon particles, dust and filter cleaned from the surface of the friction. Operation due to the viscosity of the oil, the friction between the surfaces of the mechanical friction is increased, to overcome the frictions, more fuel is consumed, and also reduces the engine power output. Bearing lubricant viscosity, oil circulation rate will slow down the cooling and heat dissipation backward, easy to make the engine overheating.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 32064XU NTN | 320 | 480 | 100 |
| 32964E1 NTN | 320 | 440 | 72 |