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Key Design Features
1. Extended Structure for Higher Load Capacity
The LM4L series uses an elongated body to increase the effective support length along the guide shaft. Compared with standard-length linear bearings, this design provides a larger load-bearing contact area, making it more suitable for heavy radial loads and long-stroke linear motion systems.
2. Precision Steel Ball System for Smooth Linear Movement
Internally precision-graded steel balls circulate through the bearing with controlled clearance and minimal friction. This rolling motion helps maintain smooth linear travel, reduce running resistance, and support consistent positioning performance in automation equipment.
3. Bilateral Sealing for Improved Environmental Protection
Each end of the bearing is fitted with a rubber dust seal. These seals block external contaminants from entering the ball track while limiting lubricant loss, contributing to longer service life and reduced maintenance in industrial environments.
4. Rigorous Dimensional Control and Process Consistency
The series is manufactured with controlled tolerances for bore diameter, outer diameter, and overall length. This engineering control helps ensure assembly compatibility, motion stability, and repeatable performance across batches.
5. Wide Model Coverage for Flexible Selection
The LM4L series covers a broad range of bore sizes from 4 mm to 60 mm, enabling engineers to select an appropriate model based on shaft size, load requirements, and installation envelope.
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Nominal Shaft Diameter (mm)
Model
Number of Steel Ball Rows
dr (mm)
dr Tolerance (μm)
D (mm)
D Tolerance (μm)
L (mm)
L Tolerance (μm)
B (mm)
4
LM4L
4
4
0 / -9
8
0 / -11
23
0 / -200
20.4
5
LM5LUU
4
5
0 / -9
10
0 / -11
28
0 / -200
20.4
6
LM6LUU
4
6
0 / -10
12
0 / -13
35
0 / -300
27
8
LM8LUU
4
8
0 / -10
15
0 / -13
45
0 / -300
35
10
LM10LUU
4
10
0 / -10
19
0 / -16
55
0 / -300
44
12
LM12LUU
4
12
0 / -10
21
0 / -16
57
0 / -300
46
13
LM13LUU
4
13
0 / -10
23
0 / -16
61
0 / -300
46
16
LM16LUU
5
16
0 / -10
28
0 / -16
70
0 / -300
53
20
LM20LUU
5
20
0 / -12
32
0 / -19
80
0 / -300
61
25
LM25LUU
6
25
0 / -12
40
0 / -19
112
0 / -400
82
30
LM30LUU
6
30
0 / -12
45
0 / -19
123
0 / -400
89
35
LM35LUU
6
35
0 / -15
52
0 / -22
135
0 / -400
99
40
LM40LUU
6
40
0 / -15
60
0 / -22
151
0 / -400
121
50
LM50LUU
6
50
0 / -15
80
0 / -22
192
0 / -400
148
60
LM60LUU
6
60
0 / -20
90
0 / -25
209
0 / -400
170
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Application Areas
The LM4L series is suitable for linear motion systems that demand extended load support and reliable operation:
- CNC machine tools and industrial machinery
- Automated handling and assembly lines
- Food processing and packaging equipment
- Electronic manufacturing and testing systems
- 3D printers and robotic linear axes
- Special-purpose machinery with long-stroke requirements
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About YIDI MOTION
YIDI MOTION is a supplier of linear motion components, focusing on the development and production of linear bearings, extended linear bearings, linear guides, ball screws, and related accessories. The company serves industrial customers with an emphasis on quality control, dimensional consistency, and customized motion solutions.
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