LM-GA-OP SERIES

THK’s LM LM GA OP SERIES Linear Bushing Cylindrical (Standard) represents a fundamental advancement in linear motion technology, designed to deliver exceptional precision, reliability, and durability in demanding industrial environments. This series features a cylindrical housing with a standardized design, incorporating high-grade steel construction and precision-engineered ball bearings that facilitate smooth, low-friction linear movement along shafts. Key technical features include an open-type structure, allowing for easy maintenance and lubrication, and a compact, lightweight profile that simplifies integration into space-constrained applications. The bushing’s optimized ball circulation system ensures consistent load distribution, minimizing wear and extending service life even under high-speed or heavy-load conditions.

Performance advantages of the LM LM GA OP SERIES are substantial, contributing to enhanced operational efficiency across various sectors. Its low coefficient of friction reduces energy consumption and heat generation, while the high rigidity and accuracy support precise positioning and repeatability in automated systems. The bushing’s corrosion-resistant materials and sealed design options provide robust performance in harsh environments, such as those with dust, moisture, or chemical exposure. Additionally, the open-type configuration allows for straightforward cleaning and re-lubrication, reducing downtime and maintenance costs. These attributes make it an ideal choice for applications requiring smooth, uninterrupted motion with minimal vibration and noise.

In industrial machinery, the LM LM GA OP SERIES is widely employed in CNC machine tools, robotic arms, and material handling equipment, where it ensures precise linear guidance for cutting, assembly, and transfer operations. Its ability to handle multidirectional loads makes it suitable for sliding tables and linear actuators that demand high positional accuracy. Within automotive systems, this bushing series finds use in production line automation, including welding robots, painting systems, and engine component testing fixtures, contributing to improved manufacturing speed and product quality. In precision equipment, it supports applications such as semiconductor manufacturing devices, medical imaging systems, and optical instruments, where its stability and low friction are critical for achieving micron-level tolerances and reliable performance over extended periods. By combining rugged construction with advanced engineering, THK’s LM LM GA OP SERIES delivers a versatile solution that enhances productivity and longevity in diverse mechanical systems.

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Model No. Main dimensions Basic load rating
Inscribed bore diameter Outer diameter Length Dynamic rating
C
Static rating
C0

dr
Tolerance
D
Tolerance
Precision/High
L Tolerance
Precision High
mm mm mm mm mm mm mm N N
LM 100GA-OP Linear Bushing
100
0–0.010
0–0.020
150
0–0.025
175
0–0.4
14100
34800
LM 120A-OP Linear Bushing
120
0–0.010
0–0.020
180
0–0.025
200
0–0.4
16400
40000
LM 12GA-OP Linear Bushing
12
0–0.006
0–0.009
21
0–0.013
30
0–0.2
412
598
LM 13GA-OP Linear Bushing
13
0–0.006
0–0.009
23
0–0.013
32
0–0.2
510
775
LM 16GA-OP Linear Bushing
16
0–0.006
0–0.009
28
0–0.013
37
0–0.2
775
1180
LM 20GA-OP Linear Bushing
20
0–0.007
0–0.010
32
0–0.016
42
0–0.2
863
1370
LM 25GA-OP Linear Bushing
25
0–0.007
0–0.010
40
0–0.016
59
0–0.3
980
1570
LM 30GA-OP Linear Bushing
30
0–0.007
0–0.010
45
0–0.016
64
0–0.3
1570
2750
LM 35GA-OP Linear Bushing
35
0–0.008
0–0.012
52
0–0.019
70
0–0.3
1670
3140
LM 38GA-OP Linear Bushing
38
0–0.008
0–0.012
57
0–0.019
76
0–0.3
2160
4020
LM 40GA-OP Linear Bushing
40
0–0.008
0–0.012
60
0–0.019
80
0–0.3
2160
4020
LM 50GA-OP Linear Bushing
50
0–0.008
0–0.012
80
0–0.022
100
0–0.3
3820
7940
LM 60GA-OP Linear Bushing
60
0–0.009
0–0.015
90
0–0.022
110
0–0.3
4710
10000
LM 80GA-OP Linear Bushing
80
0–0.009
0–0.015
120
0–0.022
140
0–0.4
7350
16000