What Are Our Concerns About Bearings（22）

Q1: Linear bearings that do not rotate with shafts  

There is.  It is called “linear bearing”.  

Type the keyword “linear bearing” search on Baidu, or add your city name search, you can find all kinds of selling linear bearing information.  

Buy the kind of axial size and radial size ratio is greater than 10 above, look fine  long try.  When I was in the lab, I saw one of those slender shafts that can only  rotate 1 or 2 degrees. I wonder if it will meet your requirements?  

If you require no rotation at all, it is recommended that you use a slider + track,  or a roller + slide.  

Search for sellers on Taobao using the keyword “extended linear bearings”.  

Ps: What is the maximum allowable depth of your shaft into the bearing when    working?  What is the minimum size allowed to remain in the bearing?  If the shaft and bearing with part of the size is too small, it can not ensure that the shaft    does not rotate, should be appropriate to increase the length of the shaft, or      change the slider + slide or roller + slide.  

Q2: What are the specific types of gearbox, reducer, mining machinery and conveyor idlers? And what type of bearings are they  

• 1, gearbox and reducer are the same principle, if the straight gear is used, just use deep groove ball bearings in general.  If it is helical gear, bevel gear should be used tapered roller bearings, angular contact ball bearings and other bearings that can withstand axial force.  
• 2. There are many kinds of mining machinery, such as the transmission of the mill  is generally used with self-alsetting roller bearings, flotation and agitation are used with tapered roller bearings, classification and ore washing are used with self-alsetting roller bearings, deep groove ball bearings and thrust bearings, screening is also used with self-alsetting roller bearings, etc., others are not one to list.  
• 3. If the idler makes its own bearing seat, it will use deep groove ball bearings,   but it can also choose UCP bearings with seats.  

Q3: How does SolidWorks generate bearings of a particular size?  

In fact, bearings in SW are also processed by parts. According to your specific     bearing type, a standard bearing is generated from TOOLBOX and saved, and then  its sketch is modified. You can modify the equation, or delete the equation for    your specific bearing and directly change it to the specific size you want.

Q4: Bearing model 22226C/130×230×64, please explain  

The expert answers!  

22226 c / 130 x 230 x 64  

The explanation is as follows:  

2– Self-aligning roller bearing  

2– Width series code  

2– Diameter series code  

26 – inner diameter 130 mm  

C– Clamp type iron retainer  

130– Bearing inner diameter  

230– Bearing outer diameter  

64– Bearing thickness  

It’s all in millimeters  

Q5: Bearings above 17*42*10 (inner diameter, outer diameter, thickness), if you know the type, please tell me.  

6303 x3-1:17 * 42 * 13;  6303 x3 – even * 42 * 12  

The inside and outside diameters are the same except for different heights.  May   be non-standard bearings.  

Q6: Front wheel outer bearing dimensions outer ring 80, h 25, inner ring 40, H   30. What model is it?  

According to your description, it should be tapered roller bearing, od 80, OD 25,   OD 40, OD 32. The bearing model is 33208.  

Please refer to the above answer, thank you!  

Q7: What is the difference between imported bearings and domestic bearings?  

With the advent of the tide of internationalization, domestic bearing codes are     gradually in line with imported bearing codes. The latest published national         standards show that domestic codes are basically consistent with international ISO  standards.  For the advantages and disadvantages of the two, please see the        comparison of domestic bearings and imported bearings:  

• 1. The difference between models  

With the advent of the tide of internationalization, domestic bearing codes are     gradually in line with imported bearing codes. The latest published national standards show that domestic codes are basically consistent with international ISO standards.  Bearing signs, such as domestic famous bearings are generally known as Luoyang  shaft code (LUO) and Harbin bearing code is (HA) is basically the case, each      bearing out of the digital code bearing model has pinyin symbol on behalf of origin, if you are from the machinery industry should know.  

• 2. Other aspects  

Compared with domestic bearings, imported bearings are generally better than     domestic materials, heat treatment process is more advanced than domestic, high  manufacturing accuracy, manufacturing and assembly process is more reasonable,   and the service life is long, of course, the price is higher.  And imported bearings   are generally genuine, the most important is……  Imported bearings are made      abroad.  Ha ha, this point does not say everybody also can understand.  

For life, although the service life of imported bearings is longer than that of domestic bearings, but if ordinary machines are not required to be very precise, domestic bearings can be made entirely.  Now domestic bearings such as HRB,ZWZ and other big manufacturers are very good quality.  The price is reasonable and it can be lived in.  But it is better to import when the precision is required.  

Q8: Bearing models and specific dimensions with outer diameter of about 190, inner diameter of 100 and width of about 45?  

100*18*46 self-aligning roller bearing  

N 318 90* 190* 43 tapered roller bearing  

Q9: There is the size of the shaft, how to calculate the size of the bearing?  

The number obtained by dividing the inner diameter of a normal bearing by 5 is   the mantissa of a particular bearing type.  If the inner diameter is 30mm, 30÷5 = 6, then the bearing model is 206 or 306.  That’s all I know.