What Are Our Concerns About Bearings（25）

Q1: Wuyang motorcycle bearing rear wheel bearing model is how many?  

Scooters and straddles are different and you can take them off and look at the rubber ring of the bearing that’s labeled on it  

Q2: How to find the bearing type if you know the aperture?  

The general answer is the aperture divided by 5  
Such as hole 20  
20 divided by 5 is 4, so it is 04, such as 6204.  5 divided by hole 25 is 05.  Such as 6205  
But also some can not be calculated in this way, such as below 03, the Imperial bore  

Q3: 32006 bearing axial direction bearing than the general bearing?  

If by “general bearings” you mean “deep groove ball bearings”, then, yes.  
32006 is tapered roller bearing, deeper groove ball bearing, it is better at dealing with the axial force, but it should be noted that it is a single row tapered roller bearing, can only bear the axial force in one direction, if both sides, then you need to install two 32006 bearings.  
32006 Bearing (old model 2007106E),  
Inner diameter D 30mm, outer diameter D 55mm, thickness B 17mm  
Category: tapered roller bearings  

Q4: What is the meaning of ZZ in rolling bearing model 6006ZZ?  

Bearing suffix is Z for the form of bearing with dust cover, bearing code with a Z on behalf of the bearing with a dust cover, bearing code with ZZ on behalf of both sides of the dust cover.  
Z: Bearing side with dust cover  
2Z: Bearing with dust cover on both sides  
RS: Bearing side with skeleton rubber sealing ring (contact)  
2RS: Bearing rubber seal ring with frame on both sides (contact)  

Q5: How are the grades of motor bearings divided?  

Chinese bearing former code precision grade code  
The standards developed by various countries are based on ISO standards, which are generally consistent with ISO and strictly stricter than ISO standards.  
Accuracy is divided into dimensional accuracy and rotation accuracy.  It is divided into grade 0, 6X, 6, 5, 4 and 2.  
Chinese bearing old code standard is :G (class 0), E (class 6), D (class 5), C (class 4), B (class 2).  
The current code generally uses the German DIN standard.  
P0 (class 0), P6 (class 6), P5 (class 5), P4 (class 4), AND P2 (class 2).  
General standard grade P0, reflected in the bearing model is omitted, only P6 or above, grade code appears in the bearing model.  
For example: 6205 and 6205/P5, where 6205 has an accuracy level of P0 but is omitted.  This creates the impression that class P0 is a non-precision grade bearing.  
In addition, a variety of precision bearings in addition to the difference in processing technology, but also the difference in value.  For example, the value of domestic HRB bearings, P6 precision bearings are 1.5 times of P0, P5 precision bearings are 2 times of P0, P4 precision is 2.5 times of P5 precision.  

Q6: How are bearing types divided?  

The last two of the bearing model represents the inner diameter size, the inner diameter of the bearing above 03 is the last two times 5, such as 6306 inner diameter of 30mm, 7210 inner diameter of 50mm, 03 below does not meet the above rules, 00 inner diameter of 10mm, 01 inner diameter of 12mm, 02 inner diameter of 15mm, 03 inner diameter of 17mm.  The third from the bottom of the model represents the bearing series. In the case of the same inner diameter, the third from the bottom increases successively from 1,2,3 and 4. The outer diameter and thickness of the bearing increase accordingly, for example, the inner diameter of 106,206,306,406 is 30mm, and the outer diameter and thickness are increasing.  

Q7: What type of bearing is inside the SN212 bearing seat?  

You can carry 1212 or 2212  

Q8: What is the bearing model with an inner diameter of 270?  

Symbol bearing inner diameter 270 bearings have deep groove ball bearings, thrust roller bearings, tapered roller bearings, cylindrical roller bearings, self-alting ball bearings, angular contact ball bearings, etc., I do not know what kind of bearings you need?  

Q9: Find bearing type with outer diameter less than or equal to 60mm and inner diameter greater than or equal to 45mm

Deep groove ball bearing 61809 bearing inner diameter 45 outer diameter 58 thick 7  

Q10: What bearing type is inner diameter 12 and outer diameter 30 and
high 9?  

Non-standard bearings.  
Standard deep groove ball bearing: 6001– DIAMETER 12, diameter 28, width 8  
Inside diameter 12, outside diameter 32, width 10  

Q11: Eccentric bearing type  

Model: 500752307  
Type: integral eccentric bearing (planetary cycloid reducer arm bearing)  
Inside diameter: 35 mm  
Outer diameter: 86.5 mm  
Thickness: 50 mm  

Q12:Bearing bore 32  

Bearing type Domestic new model Domestic old model inner diameter (mm) outer diameter (mm) width  
Tapered roller bearing 15123/15243 15123/15243 32 62 18.2  

Q13: 6210 bearing type Inner diameter accuracy bearing load type  

Deep groove ball bearing  
= standard GB/T276-1994  
Bearing code =6210  
Basic size \d(mm)=50  
Basic size \D(mm)=90  
Basic size \B(mm)=20  
Mounting size \ DAMin (mm)=57  
Mounting dimension \Damax(mm)=83  
Mounting dimension \rasmax(mm)=1  
Basic rated load \Cr(kN)=35  
Basic rated load \Cor(kN)=23.2  
Limit speed \ fat (r/min)=6700  
Limit speed \ oil (r/min)=8500  
Weight (kg) = 0.463  
Accuracy: P0 ordinary  

Q14: How to distinguish single row centripetal ball bearings and double row centripetal ball bearings in the model?  

A double row centripetal thrust bearing has at least two more letters (at least) after it than a single row centripetal thrust bearing, and those two letters are used to describe the pair mode of the double row centripetal thrust bearing.  
For example, for NSK models, there are more DB,DF or DT after the single column, indicating whether they are back-to-back, face to face or in parallel pairs.  Different use requirements, the choice of pairs are not the same.  

Q15: Do you have bearings with outer diameter 36 and inner diameter 15?  

In the national standard for centripetal ball bearings (GB276-64), the inner hole sizes are 6, 7, 8, 9, 10, 12, 15, 17, 20, 25, etc., and the outer diameter sizes are 11, 13, 14, 16, 17, 19, 22, 24, 26, 28, 30, 32, 35, 40, 42, 47, etc.  The inner diameter is 15, and the outer diameter is only 24, 32, 35, etc.  There’s no 36!  

Q16: Bearing 6004RS model meaning  

6: indicates deep groove ball bearing  
0: width series code  
04: Inner diameter size code, indicating that the inner diameter is 4×5 = 20mm  
RS: stands for bearing side with skeleton rubber sealing ring (non-contact)