THK’s LMK SERIES flanged-type Square Flange Model LMK Linear Bushings represent a significant advancement in linear motion technology, engineered to deliver exceptional precision, durability, and load-bearing capacity in demanding industrial environments. These compact, high-performance components are designed with a square flange configuration that simplifies mounting and enhances structural rigidity, making them ideal for applications where space constraints and alignment accuracy are critical. The LMK SERIES incorporates THK’s proprietary Guide Ball Bushing technology, which features a unique ball circulation system that minimizes friction and ensures smooth, consistent motion even under high loads and rapid cycling conditions.
Key technical features of the LMK Linear Bushings include their optimized contact angle design, which distributes loads evenly across the ball grooves to maximize rigidity and minimize deformation under stress. The flanged construction provides secure attachment points, reducing the need for additional mounting hardware and streamlining integration into machine designs. Manufactured from high-grade chromium steel and subjected to THK’s rigorous heat treatment processes, these bushings offer superior wear resistance and extended service life. The inclusion of seals and wipers effectively prevents contamination from dust, chips, and other particulates, maintaining lubrication integrity and operational reliability in harsh environments.
Performance advantages of the LMK SERIES are evident in their ability to support high moment loads while maintaining precise linear guidance with minimal maintenance requirements. The low coefficient of friction inherent in the Guide Ball Bushing design translates to reduced energy consumption and heat generation, contributing to overall system efficiency. Their compact dimensions allow for space-saving installations without compromising on load capacity or accuracy, making them particularly suitable for modern machinery designs that prioritize footprint reduction.
Typical applications for the LMK flanged-type Linear Bushings span across multiple industries, including industrial automation where they are deployed in CNC machining centers, robotic positioning systems, and material handling equipment. In automotive manufacturing, these components are integral to assembly line robots, precision welding fixtures, and testing apparatus that demand repeatable accuracy under continuous operation. The precision equipment sector utilizes LMK bushings in semiconductor fabrication tools, optical alignment systems, and medical device manufacturing where sub-micron level precision is non-negotiable. Their robust construction and contamination resistance also make them well-suited for food processing machinery, packaging systems, and other applications requiring frequent washdowns or exposure to corrosive agents.
| Model No. | Main dimensions | Basic load rating | ||||||||
| Inscribed bore diameter | Outer diameter | Length | Flange diameter | Dynamic rating C |
Static rating C0 |
|||||
dr |
Tolerance | D |
Tolerance | L | Tolerance | D1 | Tolerance | |||
| mm | mm | mm | mm | mm | mm | mm | mm | N | N | |
6 |
0–0.009 |
12 |
0–0.011 |
19 |
0–0.2 |
28 |
0–0.2 |
22 |
206 |
|
8 |
0–0.009 |
15 |
0–0.011 |
17 |
0–0.2 |
32 |
0–0.2 |
25 |
176 |
|
8 |
0–0.009 |
15 |
0–0.011 |
24 |
0–0.2 |
32 |
0–0.2 |
25 |
265 |
|
10 |
0–0.009 |
19 |
0–0.013 |
29 |
0–0.2 |
39 |
0–0.2 |
30 |
373 |
|
12 |
0–0.009 |
21 |
0–0.013 |
30 |
0–0.2 |
42 |
0–0.2 |
32 |
412 |
|
13 |
0–0.009 |
23 |
0–0.013 |
32 |
0–0.2 |
43 |
0–0.2 |
34 |
510 |
|
16 |
0–0.009 |
28 |
0–0.013 |
37 |
0–0.2 |
48 |
0–0.2 |
37 |
775 |
|
20 |
0–0.010 |
32 |
0–0.016 |
42 |
0–0.2 |
54 |
0–0.2 |
42 |
863 |
|
25 |
0–0.010 |
40 |
0–0.016 |
59 |
0–0.3 |
62 |
0–0.2 |
50 |
980 |
|
30 |
0–0.010 |
45 |
0–0.016 |
64 |
0–0.3 |
74 |
0–0.2 |
58 |
1570 |
|
35 |
0–0.012 |
52 |
0–0.019 |
70 |
0–0.3 |
82 |
0–0.2 |
64 |
1670 |
|
40 |
0–0.012 |
60 |
0–0.019 |
80 |
0–0.3 |
96 |
0–0.3 |
75 |
2160 |
|
50 |
0–0.012 |
80 |
0–0.019 |
100 |
0–0.3 |
116 |
0–0.3 |
92 |
3820 |
|
60 |
0–0.015 |
90 |
0–0.022 |
110 |
0–0.3 |
134 |
0–0.3 |
106 |
4710 |
|