What Are Our Concerns About Bearings（61）

Q1:Bearing 6212, what is the diameter?

A:Deep groove ball bearing 6212

inner diameter 60 outer diameter 110 thickness 22

Cr (KN) 47.8 Cor (KN) 32.8  

Oil lubrication speed (r/min) 5600 Oil lubrication speed (r/min)7000 Weight 0.789  

Q2:What is the model of domestic 24134 bearing?

A:Spherical roller bearing  

But you don’t have all the models  

There’s supposed to be a suffix  

CA or MB or CC stands for structure  

They are all the same size if no structure is required  

Also note that the inner diameter is not tapered  

Q3:Inner diameter 60 and outer diameter 100. What type of bearing is it?

A:33112/Q Single row tapered roller bearing inner diameter 60 outer diameter 100 thick 30

Q4:What is the outer diameter tolerance of 603ZZ bearing?

A:Outer diameter tolerance of 603ZZ bearing:  

P0 precision product inner diameter, outer diameter size tolerance is: 0mm to -0.008mm  

Bearing series size: miniature deep groove ball bearings  

Cr Rated dynamic load (N) : 570  

Cor static load rating (N) : 187  

Cr rated dynamic load (Kg) : 58  

Cor rated static load (Kg) : 19  

Q5:Why is domestic bearing not as good as imported bearings?

A:The main difference is material.

First, the deviation between actual and theoretical content of metal elements is small, and the deviation tends to be zero.  

Second, the content of harmful substances is low, and the pursuit of zero as far as possible.  

Third, the process controls the number, size and distribution of non-metallic inclusions and carbides, because the number, size and distribution of non-metallic inclusions and carbides have a great impact on the service life of bearing steel, and often the failure of bearings is caused by the expansion of micro-cracks around large inclusion or carbides. 

 The content of inclusions is closely related to the oxygen content in steel, the higher the oxygen content, the more inclusions, the shorter the life.  The larger the particle size of inclusions and carbides, the more uneven the distribution, the shorter the service life.  

Q6:20204T bearing and domestic bearing which model is the same?

A:First of all, this model is INA model, which has been the old code name. The new code name is 20204-TVP, that is to say, 20204T is 20204-TVP.  

20204 is a single row self-aligning roller bearing.  

TVP is the bearing cage material, which means that the bearing uses glass fiber reinforced window cage and steel ball.  

Specific dimensions are as follows:  

Inside diameter: 20 mm  

Outer diameter: 47 mm  

Height: 14 mm  

Weight: 0.114 KG  

In addition, you do not need to convert to the domestic model, you can just say this model, but must be careful, tell others the material of the cage.  

Q7:What is model 220RU30 bearing domestic？

A:This bearing is TIMKEN non-standard bearing, and there is no corresponding model in China  

Bearing type: 220RU30  

The inner diameter of 220  

Diameter of 340  

The width of 90  

Brand: TIMKEN  

Cylindrical roller bearing  

Q8:Is there any difference between imported bearing models and domestic bearing models?

A:The quality of imported bearings is obviously better than that of domestic bearings  

The price is 10 times more expensive than domestic  

Q9:what meaning E behind with domestic bearing ?

A:E usually means to keep the material of the steel sheet stamping type  

Taper roller bearing old type suffix will also bring E 

Q10:Imported NSK bearing model 30TAC62B, what is the domestic mode？which category belongs to? 

A：The domestic model is 30TAC62B, which belongs to P4(C) class

Q11:Can we see from the bearing model 352936 whether it is imported or domestic?

A:Should be the majority of domestic, type: double row cone roller.  

There should be a brand on the top of the bearing  

Q12:Is it better for thrust ball bearings to use imported bearings or domestic bearings?  

A:Imported bearings are recommended for important parts and troublesome parts to be replaced.  It is recommended to choose flat bearing (roller thrust bearing) for heavy load.  It is recommended to use a new type of composite bearing for side mounted flat bearing grease lubrication.  

Q13:What is the difference between domestic bearing and imported bearing?

A:There are signs on bearings, such as domestic bearings famous general that is, Luoyang shaft code is (LUO) and Harbin bearing code is (HA) is basically the case, each bearing out of the digital code bearing model has a pinyin symbol on behalf of origin  

Q14:Is the bearing type 5206 or 3206?

A:It should be the same, different brands have different names, Japanese are generally 5206, domestic is 3206 things are the same, Japanese NSK was also called 5206 before, but later improved, there is a rolling body bead inside, but the size is the same.  

Q15:What is the domestic model of one-way thrust ball bearing，Inner diameter 9 outer diameter 24 thickness 7？

A:”One-way thrust bearing”, commonly known as “flat bearing”, is composed of 3 pieces, each side of a flat disc, a ball in the middle (including the clip), if your bearing is like this, then it may be a non-standard bearing, because you can not find this specification.  

I guess you wrote wrong the type of the bearing.  May be “angular contact ball bearing”, “angular contact ball bearing” also has the role of one-way thrust, if it is “angular contact ball bearing” then the new model is: 709C, the old model is: 36019  

Q16:What is the domestic model of imported bearing 222318?

A:Imported bearings have never seen such a model as 222318, is it 22318?  If so, the domestic old code is 53618, self-aligning roller bearing 90*190*64  

Q17:what is domestic Guangzhou Wuyang Honda 125-A front wheel bearing model ?

A:6302, be sure to choose the one with rubber seals on both sides, called 180 series.  Now the one with rubber seal on both sides is called 63022RS. Here, 6302 is the bearing model, 2RS stands for double-sided rubber seal.  

Q18:What is the price of the bearing model 153516?

A:Domestic and imported prices are different, domestic about <200, imported about <400, the price is for reference only.

Q19:What is bearing check?

A:According to bearing stress, installation size, select the suitable bearing; At the same time, according to the size and type of bearing force, it is converted into equivalent load, and then compared with its rated load, its service life is calculated to see whether it meets the requirements of the question.

Q20:NSK bearing RLM 1710 size 17*22*10, what is this bearing? What are the parameters?

A:This is a needle roller bearing

【 RLM1710 bearing 】

Series: Solid needle roller bearings

Model: RLM1710

Inside diameter: 17

Outer diameter: 22

Thickness: 10

Overall dimension R min: 0.3

Basic load rating (N) : 5850

Basic load rating (N) : 7950

Ultimate load (kg) : 595

Ultimate load (kg) : 810

The speed limit is 13 000

Limit speed Oil lubrication: 20 000

Inner ring outer dimension D Inner diameter: 12

Inner ring dimensions B Thickness: 10.2

Installation dimension DA min: 14

Installation size Da Max: 20

Mounting dimension RA Max: 0.3

Reference weight without inner ring: 0.008

Reference weight has inner ring: 0.017