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- Name:Bearing internal clearance
- Type:B010
The internal clearance of ball bearings in operation greatly influences on bearing performance including fatigue life, vibration, noise, heat generation etc.
Consequently, it is necessary to select the proper clearance considering the bearing fit, load, speed, temperature during operation etc. There are three types of bearings internal clearance.
INTERNAL RADIAL CLEARANCE
Radial clearance may be considered to be the possible displacement of one ring relative to the other in the radial plane.
AXIAL CLEARANCE
Axial clearance may be considered to be the possible displacement of one ring relative to be other in the axial plane.
ANGULAR CLEARANCE
Angular clearance is the angle of misalignment. The misalignment of a bearing is the degree to which both rings can be displaced diagonally opposite each other.
The degree of axial clearance and the angle of misalignment depends on radial clearance, the raceway curvature of both rings and internal geometry.
The radial clearances of E&B deep groove ball bearings are according with GB/T4604 which is adopted from IS05753 equivalent, divided into five groups as shown in table 4.1.
Table 4.1 Radial internal clearance μm
E&B extra small and miniature ball, bearings also provide radial clearances in six steps as shown in table 4.2.
Table4.2 Radial internal clearance for miniature bearings μm
To obtain accurate measurements, the clearance is generally measured by applying a specified measured by applying a specified measuring load on a bearing. Therefore, the measured clearance by the amount of elastic deformation caused by the measuring load.
Consequently, it is necessary to select the proper clearance considering the bearing fit, load, speed, temperature during operation etc. There are three types of bearings internal clearance.
INTERNAL RADIAL CLEARANCE
Radial clearance may be considered to be the possible displacement of one ring relative to the other in the radial plane.
AXIAL CLEARANCE
Axial clearance may be considered to be the possible displacement of one ring relative to be other in the axial plane.
ANGULAR CLEARANCE
Angular clearance is the angle of misalignment. The misalignment of a bearing is the degree to which both rings can be displaced diagonally opposite each other.
The degree of axial clearance and the angle of misalignment depends on radial clearance, the raceway curvature of both rings and internal geometry.
The radial clearances of E&B deep groove ball bearings are according with GB/T4604 which is adopted from IS05753 equivalent, divided into five groups as shown in table 4.1.
Table 4.1 Radial internal clearance μm
| inner diameter dmm | Radial internal clearance | ||||||||||
| C2 | C0 | C3 | C4 | C5 | |||||||
| over | to | min | max | min | max | min | max | min | max | min | max |
| 2.5 | 6 | 0 | 7 | 2 | 13 | 8 | 23 | - | - | - | - |
| 6 | 10 | 0 | 7 | 2 | 13 | 8 | 23 | 14 | 29 | 20 | 37 |
| 10 | 18 | 0 | 9 | 3 | 18 | 11 | 25 | 18 | 33 | 25 | 45 |
| 18 | 24 | 0 | 10 | 5 | 20 | 13 | 28 | 20 | 36 | 28 | 48 |
| 24 | 30 | 1 | 11 | 5 | 20 | 13 | 28 | 23 | 41 | 30 | 53 |
| 30 | 40 | 1 | 11 | 6 | 20 | 15 | 33 | 28 | 46 | 40 | 64 |
| 40 | 50 | 1 | 11 | 6 | 23 | 18 | 36 | 30 | 51 | 45 | 73 |
E&B extra small and miniature ball, bearings also provide radial clearances in six steps as shown in table 4.2.
Table4.2 Radial internal clearance for miniature bearings μm
| clearance symbol | MC1 | MC2 | MC3 | MC4 | MC5 | MC6 | ||||||
| clearance | min | max | min | max | min | max | min | max | min | max | min | max |
| 0 | 5 | 3 | 8 | 5 | 10 | 8 | 13 | 13 | 20 | 20 | 28 | |
To obtain accurate measurements, the clearance is generally measured by applying a specified measured by applying a specified measuring load on a bearing. Therefore, the measured clearance by the amount of elastic deformation caused by the measuring load.