What series and grades of high speed bearings from SKF bearings are suitable for electrical workers

I don't know how much is the SKF you bought, usually the bearings are Z1Z2Z3 group, iron dustproof and glue dustproof, the speed is different at different levels, I sell bearings, and a repair power tool delivery, like you said this SKF or NSK if it is really imported estimates you will not use. Either their own things with a good one, domestic and imported a lot worse, is **, I sold him is the people-oriented z2 of he said that the installation is not bad, do not come to repair, in a bearing z1z2z3 this level is on the certificate, the bearings are the same, for example, is 6201rz, ordinary z2 is the same letter prefix you can't distinguish, I buy the goods very clearly** is also different, for example, ordinary 6201rz is 1 fast, Then 6201RZ Z3 will have different levels and different speeds, ** different, it is recommended to use iron seal Z2 group bearings, the sealing of the rubber cover will be better, the noise is low, and you can ask me if you don't understand anything.

These bearings need to be professionally customized! Standard bearings on the market are not necessarily suitable. The doctor's product was also designed for him individually. Grease, curvature, retainer are all different.

Bearings are inherently wearing parts and are generally replaced regularly. Fact deep groove ball bearings are very good for Sweden's SKF and Japan's NSK. The 608-2RS1 you use is glue-sealed, but if you change it in two days as you said, there must be a problem.

It may be that the bearing you bought is not of good quality. It's also possible that you're installing or using an environment. For specific questions, you can contact Shijiazhuang Timken Bearing for consultation.

There are professionals to analyze and answer for you. Bearing** reasonable, package mailed.

Among rolling bearings, the highest ultimate speed is a single row radial ball bearing.

The ultimate speed of rolling bearings is the maximum allowable speed under certain load and lubrication conditions, which is related to many factors such as bearing type, size, load size and direction, lubricant type and lubrication method, clearance, cage structure and cooling conditions. The factors that affect the ultimate speed are: the size of the load, the type and direction of the load, the lubricant and the lubrication method, and the empirical proof

Improving the manufacturing accuracy of the bearing, appropriately increasing the clearance of the bearing, and using special materials and structures of the cage can also increase the ultimate speed of the bearing.

Answer]: B national standard stipulates that the basic code of rolling bearings consists of five digits, and the first person from the left is the type code, which is represented by numbers or Lu early letters. Item A, N307 is a cylindrical roller bearing.

Item B, 30207 is a tapered roller bearing, usually this type of bearing needs to be used in pairs, symmetrical installation. C, 51307 is a ball bearing. Item D, 6207 is a deep groove ball bearing.

Under the action of cyclic load, SKF bearings are prone to fatigue failure, i.e. cracking and spalling, which is the main form of bearing damage. Therefore, in order to improve the service life of the bearing, the bearing steel must have a high contact fatigue strength.

2. Abrasion resistance.

When SKF bearings are operating, not only rolling friction occurs between the rings, rolling elements and cages, but also sliding friction, which causes constant wear and tear on the bearing parts. In order to reduce the wear of bearing parts, maintain the accuracy and stability of the bearing, and prolong the service life, the bearing steel should have good wear resistance. 3. Hardness.

Hardness is one of the most important qualities of SKF bearing quality, which has a direct impact on contact fatigue strength, wear resistance and elastic limit. The hardness of the bearing steel in the use state should generally reach HRC61 65, so that the bearing can obtain high contact fatigue strength and wear resistance.

Fourth, anti-rust performance.

In order to prevent bearing parts and finished products from being corroded and rusted during processing, storage and use, it is required that the bearing steel should have good anti-rust performance.

5. Processing performance.

In order to meet the requirements of large quantities, high efficiency and high quality, bearing steel should have good processing performance. For example, cold and hot forming properties, machinability, hardenability, etc.

In addition to the above basic requirements, bearing steel should also meet the requirements of appropriate chemical composition, uniform internal structure, less non-metallic inclusions, internal surface defects in line with the standard, and the surface decarburization layer does not exceed the specified concentration, which are clearly specified in the raw material standards.

The common materials used in SKF imported bearing parts mainly include: high carbon chromium bearing steel, carburized steel (such as 20Cr2Ni4A, 15Mn, 20Cr2MnMoA), high temperature bearing steel (such as Cr4Mo4V, Cr14Mo4, Cr15Mo4V, W18Cr4V), stainless bearing steel (9Cr18, 9Cr18Mo, 1Cr18Ni9Ti), vacuum degassed steel, antimagnetic bearing steel, etc., among which the most commonly used is high carbon chromium bearing steel.

When selecting the accuracy grade of rolling bearings, it is mainly based on ().

a.Rotation accuracy and rotation speed of the bearing.

b.The type of radial load to which the bearing is subjected and the magnitude of the load.

c.Easy to install and disassemble.

d.Longevity.

Correct Collapse Answer: The bearing refers to the rotational accuracy and rotation speed of the defeated beat.