What Are Our Concerns About Bearings（16）

Q1 :What do the letters and numbers on the bearing mean? Is it related to inner diameter, outer diameter and thickness?  

A:The letters and numbers on the bearings generally indicate the product model and manufacturer’s name.  You can check the standard inner and outer diameter and thickness according to the model, but some models are specified by customers, not necessarily the standard model.  

For example, 6203 2RS is the standard bearing model. You can refer to the standard to check the size and thickness of the inner and outer diameters. 

Q2:Which type of bearing seat with 32222 bearing ?

A:Open classification of bearings: rolling bearings with nominal contact Angle between ball and ring greater than 0° and less than 90°. 

 Outer spherical bearing: a centripetal rolling bearing having an outer sphere and a wide inner ring with a locking element.  Mainly used for simple enclosures.  

 Linear bearing: a rolling bearing in which two raceways have relative linear motion in the rolling direction.  

Ball bearing: The rolling body is the rolling bearing of the ball. 

Deep groove ball bearings: Centripetal ball bearings in which each ring has a continuous groove raceway with a cross section approximately one third of the circumference of the ball. 

Thrust ball bearing: The rolling body is the thrust rolling bearing of the ball. 

Roller bearing: A roller is a rolling bearing of rollers.  

Cylindrical roller bearing: The rolling body is a cylindrical roller bearing. 

Tapered roller bearing: the rolling body is a centripetal rolling bearing of tapered roller. 

 Needle roller bearing: The rolling body is a centripetal rolling bearing of needle roller.  

Spherical roller bearing: The rolling body is a self-aligning centripetal rolling bearing with convex spherical or concave rollers.  A bearing with convex spherical rollers having a spherical raceway on the outer ring;  A bearing with concave rollers having a spherical raceway in the inner ring.  

Thrust roller bearing: The roller is the thrust roller bearing of the roller. 

Thrust cylindrical roller bearing: The roller is the thrust roller bearing of cylindrical roller. 

 Thrust tapered roller bearing: The rolling body is the thrust rolling  bearing  of  tapered roller.  

Thrust needle roller bearing: The rolling body is a thrust rolling bearing for needle rolling.  

Thrust spherical roller bearing: the rolling body is a self-aligning thrust roller bearing with convex spherical or concave rollers.  The raceway of the bearing seat ring with convex spherical roller is spherical, and the raceway of the bearing shaft ring with concave spherical roller is spherical.  

Seat bearing: An assembly of a centripetal bearing and seat with a base plate for mounting screws on a supporting surface parallel to the bearing axis line. 

Joint bearing: spherical sliding contact surface, mainly suitable for swing motion, tilt motion and rotary motion spherical sliding bearing.  

Combined bearing: a rolling bearing in a set of bearings combined by two or more of the above bearing structures at the same time.  Such as needle roller and thrust cylindrical roller combined bearings, needle roller and thrust ball combined bearings, needle roller and angular contact ball combined bearings, etc.  

Plain bearing: plain bearing has no inner and outer rings and no rolling body. It is generally made of wear-resistant materials.  It is usually used for low speed, heavy load, lubricating oil filling and mechanical rotating parts which are difficult to maintain. 

1200  7   1303 12.5   2208 24.2

1200K 7.8  1303K 13.2  2208K 30

1201 7.5   1304  14.2  2208-2RS 27.5

1201K 8.3  1304K  15   2209 29.5

1202 8     1305  15.8  2209K 32.7

1202K 8.4  1305K 16.7   2210 34.4

 1203 9    1306 18.5   2210K 39.2

1203K 9.4  1306K 20    2211 41

1204  10    1307 22.7  2211K 47.8

1204K  10.5  1307K 24  2212 50.4

1205  10.5   1308 29   2212K 54.6

1205K 10.8   1308K 30.5  2213 57.4

1206 13     1309 38.2   2213K 61.4

1206K 13.4  1309K 40    2214 64.5

1207 15     1310 46.3   2214K 21

1207K 15.5  1310K 48.6   2304 22

1208 18     1311 53.4   2304K 22.3

1208K 18.5  1311K 56.1   2305 23.4

1209 20.8    1312 63    2305K 24.5

1209K 21.6  1312K 66.1   2306 25.7

 1210 23.2   1313 71.2   2306K 30.7

1210K 24.4  1313K 74.8   2307 32.3

1211  30   1314 88     2307K 40

1211K 31   1314K 92.5   2308 42

1212 36    2204 13.2    2308K 51.5

1212K 37  2204K 13.8    2309 54

1213 42  2204-2RS 17.2  2309K 64

1213K 44.1  2205 14.3    2310 67

1214  48   2205K 15.5   2310K 11.8

1214K 50.4  2205-2RS 18.6  2202 15.3

1215  55.2  2206 15     2202-2RS 12.5

1215K 58    2206K 16    2203 16.3

1216  61.8  2206-2RS 19.5   2203-2RS

1216K 64.9   2207 20

Q3:Code 60013754 Bearing type? What is the inside and outside diameter?

A:Bearing model, the bearing size can be judged from the intuitive model.  

Type code, intuitive structural bearing can be judged from the bearing (main classification according to the shape of the rolling body).  

From the model outside diameter code can only judge a series of effects, but what series what size. ISO and the main production of bearings have standards, countries basically follow ISO standards.  For details, refer to the manual.  code  

The width and serial code outer diameter are basically the same case, but also need to check the manual.  

Diameter code:  

The basic bearing code is: three digit, four digit, five digit, with a slash.  

• 1. Three numbers: the number from right to left, one number indicating the size of the internal meridian, and several numbers indicating the internal diameter are several millimeters.  For example: the diameter of 608 bearing is 8mm.  

• 2,4, and 5 digits: numbers from right to left, the first two digits being internal codes.  

Among them:  

00 indicates that the inner diameter of the bearing is 10mm,  

01 means that the inner diameter of the bearing is 12mm,  

The inner diameter of the bearing 02 is 15mm, BR /> 03, indicating that the bearing diameter is less than 17mm.  

The dimensions above 04 are equal to the number of 5 times the first two numbers from right to left.  

For example: 6201 inside diameter: 12 mm.  

6204 is the bearing diameter: 20mm.  

Third, in the bearing type diagonal, the diagonal number to the right is the size of the inner diameter.  

For example, the diameter of NK20/16 is 16mm.  

The inner diameter of the two hundred and three percent bearing is 500mm.  

Measuring the rolling diameter code and calculating the inner diameter of the method are basically correct.  

Inch bearings, as well as some individual factory representatives, there are other methods.  

Outside diameter code parsing:  

For example: 6205  

05 is the inner diameter code.  Outer diameter size (mm) = 05 times 5 is equal to 25mm  

2 stands for diameter series code.  (The diameter of the bearing series is the same code, and the size of the diameter of the bearing series code is the outer diameter).  Same diameter, diameter 4> 3> 2> 0> 9> 8> 7 (some manufacturers have 7 series, some don’t)  

These 6405,6305,6205,6005,6905 (61905), 6805 (61,805), 6705, these bearings are the same cylinder diameter, successively diameter smaller size of deep groove ball bearings.  

Width code:  

The fourth bearing type from right to left is the width of the code.  For example: 21315 is the width of the “1” series.  6205 is the “0” series width (actually 6 (0) the “0” width of 205 is omitted.  

“0” “1”, “2”, “3” “4” 5 “to” 6 “.  .  In the same diameter, in the same outer diameter, the width dimensions become wider in reverse.  

Type code number from left to right the sum of the first or second and second digits  

“6” represents deep groove ball bearings  

“4” represents a double row deep groove ball bearing  

“2” or “1” means self-aligning ball bearings (basic type four numbers 0: double row self-aligning ball bearings  

Case: 2205 1204  

The standard model should be 0220,0  

The standard model can be omitted. It should be 01204,0 can be omitted.) “21”, “22”, “23” and “24” denote spherical roller bearings.  

“N” denotes cylindrical roller bearing (including short cylindrical roller and slender needle part)  

“7” represents angular contact ball bearing  

“3” means tapered roller bearing (metric)  

“51”, “52” and “53” indicate thrust heart ball bearings (five number basic types)  

“81” stands for short cylindrical roller thrust bearing.