What is the difference between metric system and i

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How is the difference between metric system and imperial system of bearings

◎ what is the difference between metric system and imperial system of bearings

metric system is also called metric system! The unit is mm cm m. The English system bearing represents the external dimension and tolerance of the bearing in English system units, which is applicable to devices with English system dimensions. English bearings are applicable to industrial machines and small rotary machines of various English sizes. 1 inch = 2.5400 cm. Long time production 1 foot = 12 inches = 0.3048 m

◎ the latest SKF Bearing rated life theory and formula

for modern high-quality bearings, the nominal or basic rated life may be very different from the actual service life in a particular application. In a specific application, the service life is affected by various factors, including lubrication, pollution degree, ball screw, because there are many balls between the ball screw shaft and the screw nut of the ball screw pair, such as rotation movement, misalignment, correct installation and environmental factors

because 3. The loading and unloading test force of the testing machine should be stable, this ISO 281:1990/amd 2:2000 contains a modified life equation to supplement the calculation of the basic rated life. This life calculation method uses a correction factor that takes into account the 10 lubrication, contamination and material fatigue limits of the bearing. The imported pump valve industrial washing machine

iso 281:1990/amd 2:2000 also allows the bearing manufacturer to recommend appropriate methods to calculate the available bearing life correction factors according to the operating conditions. SKF correction factor askf adopts the concept of fatigue load limit Pu, which is similar to the algorithm used for other machine components. The fatigue load limit values are given in the product list. In addition, the SKF life correction factor askf also uses the lubrication condition (viscosity ratio) and a factor indicating the degree of contamination η C to reflect the operating conditions in use

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