What Are Our Concerns About Bearings（23）

Q1: What is the meaning of bearings?  

According to the nominal contact Angle of bearings, they are divided into centripetal bearings;  Thrust bearing.  

Bearing Name Type Code:  

• Aligning ball bearing — 1;  
• Self-aligning roller bearing — 2;  
• Tapered roller bearing -3;  
• Thrust ball bearing -5  
• Deep groove ball bearing -6;  
• Angular contact ball bearing -7;  
• Cylindrical roller bearing -n;  
• Needle roller bearing -NA;  

The two digits on the right represent the nominal size of the bearing’s inner diameter. When the inner diameter is in the range of 20~480MM, the inner diameter multiplied by five is the inner diameter size of 10~17MM. Please refer to the bearing manual  

The third from the right is the diameter series code: the diameter series code has 7,8,9,0,1,2,3,4,5 and other diameter sizes increasing successively  

Fourth from the right is the width series code, with 8,0,1,2,3,4,5,6 indicating increasing width dimensions.  The same bearing with the same inner diameter has   large outer dimension (outer diameter, width) and strong bearing capacity  

The fifth from the right indicates the bearing type  

Q2: FU208 SF207 MF208 SFA205 MP205  See the bearing…  

These are outer spherical bearings  

Conventional bearings are equipped with UC  

• FU208 match UC208  
• SF207 match UC207  
• MF208 match UC208  
• SFA205 match UC205  
• MP205 match UC205  

The type is the type behind the outer spherical seat UC stands for bearing  

Q3: Where are bearings generally used?  

Miniature ball bearings have a wide range of applications.  Suitable for high-speed rotation, low friction torque, low vibration, low noise requirements of the product.  There are 18 kinds of miniature bearings with inner diameter of φ2mm or less in metric system 68, 69, 60 series, and 6 kinds in British system R series.  It can also be divided into ZZ steel plate bearing dust cover series, RS rubber bearing sealing ring series, Teflon bearing sealing ring series, flange series, stainless steel series,  ceramic ball series, etc.  

Miniature bearings are suitable for all kinds of industrial equipment, small rotary motors, etc.  

Recently, there has been an increase in demand for these devices to be miniaturized, lightweight and thin-walled.  Main uses office equipment micro motor soft drive pressure rotor dental drill hard disk motor stepper motor VIDEO recorder magnetic drum toy model computer fan encoder commonly used micro bearing model 682 682ZZ MR52 MR52ZZ 692 692ZZ 683 683ZZ  MR83 MR83ZZ 693 693ZZ 603 603ZZ 623 623ZZ MR74 MR74ZZ MR84 MR84ZZ 684 684ZZ MR104 MR104ZZ 694 694ZZ 604 604ZZ 624 624ZZ  MR85 MR85ZZ MR95 MR95ZZ MR105 MR105ZZ 685 685ZZ MR115ZZ 695ZZ 605ZZ 625ZZ MR106 MR106ZZ MR126 MR126ZZ 686 686ZZ 696ZZ   606ZZ 626ZZ MR117 MR117ZZ MR137 MR137ZZ 687 687ZZ 607ZZ 627ZZ MR128 MR128ZZ MR148 MR148ZZ 688 688ZZ 698ZZ 608ZZ MR149   MR149ZZ 689 689ZZ 609ZZ 629ZZ 639ZZ 6000ZZ 16001ZZ 6200ZZ

Q4: What type of bearing should be used for y160m2-2 and Y2-160M1-2 motors  

Use model Z1-6309.  

• 1, mechanical line standard JB/T 10391-2002 “Y series three-phase asynchronous motor” page 3 is so said: “S, M, L behind the number 1, 2 respectively represent the same frame number and speed of different power”.  In fact, the length of M2 core is larger than that of M1, so the motor capacity is larger.  
• 2. Y series motors with frame size of 160M have 6 specifications:  

Y160M1-2, 11 kW  

Y160M2-2, 15 kW  

Y160M – 4, 11 kW  

Y160M -,7.5 6 kW  

Y160M1-8, 4 kW  

“Y160M2-8 kW  

• 3. “Y160M-2” does not exist, at least not in the specification of the model.  

Q5: The bearing model is NU228EC, what does it mean?  Thank you ~ ~  

Cylindrical roller bearing (inner ring without flange, outer ring with double flange)  

Basic code name: NU228  

28: Inner diameter code.  Indicates the inner diameter of the bearing =28×5=140.00mm  

2: outer diameter code.  Indicates that the outer diameter of the bearing is “2” series.  

NU: indicates the type structure code.  Inner ring no flange, outer ring double flange, cylindrical roller bearings.  

N: Indicates the type number.  The rolling body representing this type of bearing is cylindrical.  

Post code:  

It is worth noting that EC, the code marking method, is common in SKF.  There should be a letter after EC.  

For example, ECP, ECJ, and ECM.  Cage code.  

E: Enhanced.  Optimize the internal design, increase the number of rollers, increase the diameter of rollers, roller guidance.  

P: Cage material code.  Resin cage.  

J: Stamped steel cage.  

M: Turning copper alloy cage  

Q6: What does bearing 6206RZ mean?  

Tlyaof you may be wrong. RZ: It’s a rubber seal, not a dust cap.  

Specific explanations are as follows:  

6206RZ: Deep groove ball bearing with non-contact skeleton rubber seal on one side.  

6: deep groove ball code, that is, deep groove ball bearings.  

2: Size series.  

06: Bearing diameter size, calculation method is: 06*5=30 mm.  That is to say, the bearing diameter is 30mm.  

RZ: Bearing side with non-contact skeleton rubber sealing ring.  

If you don’t understand, ask again.