1. The equipment technical file is an important asset of the company. It is an essential condition for production and construction and technological innovation. Therefore, the technical file of the equipment is established by the technical department, and the technical files of the equipment of each workshop are uniformly registered and filed by the technical department.
2. The random files of the equipment must be archived and must not be used by anyone. However, according to the usage and needs of the data, two copies of the random copy can be used for daily borrowing. If lost, the borrower is responsible for compensation.
3. Equipment installation technical information should also be archived. When the equipment is installed, the installation unit fills in the records. After the equipment is installed and commissioned, it should be archived in time. The installation of the equipment that is not filed is not completed.
4. The signing of the equipment technical files shall be handled by the person in charge of the technical management. Each department shall periodically review the period of storage of the technical files of the equipment and the equipment inventory, and serve as the guiding documents for the equipment files.
5. For the borrowing of equipment technical files and documents, the loan approval form must be filled in, and the leadership of the technical department agrees. Equipment technical documents with a high degree of confidentiality must be read by the company's supervisor.
6. Equipment drawings and documents designed, manufactured or technologically modified by the company shall be filed by the technical department for identification. Documents related to major innovation achievements and scientific research results must be verified by the superior technical department before being listed as historical data of the company. The file is kept for a long time.
7. Technical data management, technical data and reference materials related to equipment of each unit must be uniformly subscribed by the technical department, approved by the company's leaders, and stored in the data room for borrowing. Loss and damage are doubled.
8. The drawings and documents issued by the technical department to all units shall be promptly returned to the technical department after use. If there is alteration, loss or damage, the penalty will be imposed. The standard is a fine of 1,000 yuan for each drawing and a fine of 500 for each piece of information. yuan.
9. All kinds of materials purchased by the company must be stamped with the seal of the data room, and can be borrowed after registration.
10. When the data borrower changes the work unit, he must return the borrowed drawings and materials, otherwise the formalities will not be processed.
A Spherical bearing is composed by an inner ring with a double raceway and an outer ring with spherical surface, the outer raceway center is in accord with shaft center; all having self-aligning function, which can compensate the mounting error between the shaft and bearing seat and the outer ring inclination caused by shaft deflection. They can carry large radial load and could also support any directional axial load but not pure axial load. In particular, they are suitable for the applications with heavy load or vibration.
Structures
20000Ctype is adopting spherical symmetrical rollers, no fixed ribs on the inner ring; there are also two rows of independent solid cages. This type of bearings is especially suitable for the applications with high speed rotation.
20000CA are symmetric spherical rollers, there are fixed ribs on the center of inner ring, the solid cage is integrated. This type of bearings is widely applied and especially for applications with heavy load.
Cage material
Machined brass cage or pressed cage of steel sheet.
Permissible tilt angle
See Table 1.
Tolerance and clearance
The tolerance of spherical roller bearings is class 0 and class 6. The tolerance value is available in section Rolling Bearing Tolerance.
Radial clearance of Spherical Roller Bearing is listed in Table 2 and 3.
Dynamic equivalent radial load
when Fa/Fr≤e Pr=Fr+Y1Fa
when Fa/Fr>e Pr=0.67Fr+Y2Fa
e, Y1,Y2 factors can be found in the table of bearing dimension
Dynamic equivalent radial load
P0r=Fr+Y0Fa
Y0 factors can be found in the table of bearing dimension
Table 1 The permissible angular misalignment
|
Bearing series |
30 |
40 |
31 |
41 |
22 |
32 |
13 |
23 |
|
The permissible angular misalignment ≤ |
1.5° |
2° |
1.5° |
2.5° |
1.5° |
2.5° |
1° |
2° |
Table 2 Radial clearance of spherical roller bearing with cylindrical bore
μm
|
Nominal bore diameter d mm |
C2 clearance |
Standard clearance |
C3 clearance |
C4 clearance |
C5 clearance |
||||||
|
Over |
To |
Min |
Max |
Min |
Max |
Over |
To |
Min |
Max |
Min |
Max |
|
14 18 24
30 40 50
65 80 100
120 140 160
180 200 225
250 280 315
355 400 450
500 560 630
710 800 900 |
18 24 30
40 50 65
80 100 120
140 160 180
200 225 250
280 315 355
400 450 500
560 630 710
800 900 1000 |
10 10 15
15 20 20
30 35 40
50 60 65
70 80 90
100 110 120
130 140 140
150 170 190
210 230 260 |
20 20 25
30 35 40
50 60 75
95 110 120
130 140 150 170 190 200
220 240
280 310 350
390 430 480 |
20 20 25
30 35 40
50 60 75
95 110 120
130 140 150
170 190 200
220 240 260
280 310 350
390 430 480 |
35 35 40 45 55 65
80 100 120
145 170 180
200 220 240
260 280 310
340 370 410
440 480 530
580 650 710 |
35 35 40
45 55 65
80 100 120
145 170 180
200 220 240
260 280 310
370 410
440 480 530
580 650 710 |
45 45 55
60 75 90
110 135 160
190 220 240
260 290 320
350 370 410
450 500 550
600 650 700
770 860 930 |
45 45 55
60 75 90
110 135 160
190 220 240
260 290 320
350 370 410
450 500 550
600 650 700
770 860 930 |
60 60 75
80 100 120
145 180 210
240 280 310
340 380 420
460 500 550
600 660 720
780 850 920
1010 1120 1220 |
60 60 75
80 100 120
145 180 210
240 280 310
340 380 420
460 500 550
600 660 720
780 850 920
1010 1120 1220 |
75 75 95
100 125 150
180 225 260
300 350 390
430 470 520
570 630 690
750 820 900
1000 1100 1190
1300 1440 1570 |
Table 3 Radial clearance of spherical roller bearing with tapered bore
μm
|
Nominal bore diameter d mm |
C2 clearance |
Standard clearance |
C3 clearance |
C4 clearance |
C5 clearance |
||||||
|
Over |
To |
Min |
Max |
Min |
Max |
Over |
To |
Min |
Max |
Min |
Max |
|
18 24 30 40
50 65 80
100 120 140
160 180 200
225 250 280
315 355 400
450 500 560
630 710 800 900 |
24 30 40 50
65 80 100
120 140 160
180 200 225
250 280 315
355 400 450
500 560 630
710 800 900 1000 |
15 20 25 30
40 50 55
65 80 90
100 110 120
140 150 170
190 210 230
260 290 320
350 390 440 490 |
25 30 35 45
55 70 80
100 120 130
140 160 180
200 220 240
270 300 330
410 460
510 570 640 710 |
25 30 35 45
55 70 80
100 120 130
140 160 180
200 220 240
270 300 330
370 410 460 510 570 640 710 |
35 40 50 60
75 95 110
135 160 180
200 220 250
270 300 330
360 440
490 540 600
670 750 840 930 |
35 40 50 60
75 95 110
135 160 180
200 220 250
270 300 330
360 400 440
490 540 600
670 750 840 930 |
45 55 65 80
95 120 140
170 200 230
260 290 320
350 390 430
470 520 570
630 680 760
850 960 1070 1190 |
45 55 65 80
95 120 140
170 200 230
260 290 320
350 390 430
470 520 570
630 680 760
850 960 1070 1190 |
60 75 85 100
120 150 180
220 260 300
340 370 410
450 490 540
590 650 720
790 870 980
1090 1220 1370 1520 |
60 75 85 100
120 150 180
220 260 300
340 370 410
450 490 540
590 650 720
790 870 980
1090 1220 1370 1520 |
75 95 105 130
160 200 230
280 330 380
430 470 520
570 620 680
740 820 910
1000 1100 1230
1360 1500 1690 1860 |
Spherical Roller Bearing
Spherical Roller Bearing,One Row Spherical Roller Bearing,Two Row Spherical Roller Bearing
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