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CSF/CSG-type harmonic reducer bearing
- Commodity name： CSF/CSG-type harmonic reducer bearing
- Product Description
-
Product Introduction
The bearings for CSF/CSG-type harmonic reducers feature a split outer ring and an integral inner ring. The outer ring is divided into two segments, while the inner ring remains a single-piece design. During installation, no flange or bearing housing is required, making these bearings suitable for various reducers in the CSG (CSF) series.
Structural composition
The structural components of the CSF/CSG-type harmonic reducer bearing include a rigid gear, a flexible gear, and a wave generator.
1. The rigid wheel can be fixed to the housing of the harmonic reducer. It is a rigid, ring-shaped component with an internal gear ring, and its number of teeth is two more than that of the flexible wheel.
2. The flexspline is a component mounted at the output end of the harmonic reducer. It is a flexible, thin-walled elastomer part equipped with an external gear ring. The flexspline is made from alloy steel.
3. The flexible bearing, combined with an elliptical cam, forms the wave generator. It is typically mounted at the input end of the harmonic reducer. The inner ring of the flexible bearing, which is fixed to the cam, features an elliptical outer ring that undergoes elastic deformation thanks to the use of rolling elements.
Model and Specifications
Bearing model
Model Number
Basic Dimension Main Dimension (mm)
Inner ring mounting hole
Holes of Inner Ring
Outer ring mounting hole
Holes of Outer Ring
Rated load
Load Rating
(KN)
Weight
Weight
Internal Fixed Hole - X1
Inner ring bore - X2
Inner ring bore - X3
Outer ring hole - X4
Outer ring hole - Y4
Guangyang Model
Model
Exchange models
Interchange
Model
d
D
H
H1
H2
H3
B
B1
D1
D2
D3
Center diameter
d1
Hole size
X1
Center diameter
d2
Hole size
X2
Center diameter
d3
Hole size
X3
Center diameter
d4
Hole size
X4
Center diameter
d4
Hole size
Y4
C
Co
Kilogram
CSF(CSG)-14
CRB14-55
11
55
16.5
16
12
7
13.5
2.7
42.5
30
41.8
15
3-Φ2.5
17
6-M4
23
6-M4
49
8-Φ3.5
49
4-M3
4.74
6.07
0.15
CSF(CSG)-17
CRB17-62
10
62
16.5
16
12
7
13.5
2.5
49.5
36
49
15
3-Φ3
19
6-M5
27
6-M5
56
10-Φ3.5
56
5-M3
5.29
7.55
0.31
CSF(CSG)-20
CRB20-70
14
70
16.5
16
12.5
7
13.5
2.5
58
43
56.5
19
4-Φ3
24
8-M5
32
8-M6
64
12-Φ3.4
64
4-M3
5.78
9
0.39
CSF(CSG)-25
CRB25-85
20
85
18.5
18
14
7
16.5
2
73
53
67
26
4-Φ3
30
8-M6
42
8-M8
79
16-Φ3.4
79
4-M3
96
15.1
0.7
CSF(CSG)-32
CRB32-112
26
112
22.5
21.5
17
9.5
19
3
96
66
90
34
4-Φ5
40
8-M8
55
8-M10
104
16-Φ4.5
104
4-M4
15
25
1.4
CSF(CSG)-40
CRB40-126
24(32)
126
24
22.5
16.5
9.5
19.5
2.5
109
90
105
42
4-Φ5
50
8-M10
68
8-M10
117
20-Φ5
117
4-M4
21.3
36.5
1.8
CSF(CSG)-50
CRB50-157
32(40)
157
31
30
23
13
26
3
137
102
131.6
50
4-Φ5
60
8-M14
84
8-M14
147
16-Φ5.5
147
4-M5
34.8
60.2
3.7
CSF(CSG)-65
CRB65-210
44(52)
210
39
37
30.5
16.5
32
4
186
136
176
64
4-Φ6
80
8-M16
110
8-M16
198
20-Φ6.5
198
4-M6
55.6
103
8
Application areas
The CSF/CSG-type harmonic reducer bearing is a specialized bearing designed for use in various reducers of the CSG (CSF) series.
Factors Affecting the Function of Bearing Oil Seals in CSF/CSG-Type Harmonic Reducers
1. Surface linear velocity of the shaft: For oil seals made of different materials, under the same diameter conditions, the degree to which they can accommodate the rotational linear velocity of the shaft surface varies. Generally, the linear velocity range for oil seals should be less than 15 meters per second. At the same time, the seals must have good lubrication and heat dissipation conditions. For operating conditions with more severe requirements, the allowable linear velocity of the oil seal needs to be even lower.
2. Temperature: The rotating shaft surface of the bearing will experience friction with the sealing device of the oil seal; therefore, the temperature of the sealing device will be higher than that of the lubricating oil. During operation, the temperature difference between the oil seal and the working medium can reach as high as 50°C. The higher the bearing speed and the greater the pressure, the higher the temperature at the sealing edge will be. If the oil seal is equipped with a dust-proof function, its operating temperature will be about 20°C higher than that of a standard oil seal. Once the temperature exceeds the allowable limit, it will shorten the service life of the harmonic drive bearing’s oil seal, accelerate the permanent hardening of the sealing device, and increase the degree of wear on the oil seal.
3. Pressure: Under conditions with no pressure or low pressure, harmonic drive reducer bearing oil seals can perform more effectively. In such an environment, the operating pressure of the oil seal should be between 0.02 and 0.05 MPa. Once this pressure exceeds the specified range, the oil seal should be replaced with a more durable one.
4. Dust Prevention: Oil seals equipped with dust-proof devices can effectively prevent foreign objects, dust, and moisture from entering the cavity of the oil seal. If the oil seal becomes severely contaminated, two oil seals can be installed and used together.
Keywords:
CSF/CSG-type harmonic reducer bearing
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