SL SERIES

The THK SC SL SERIES Linear Bushing (Standard) represents a fundamental advancement in linear motion technology, designed to deliver exceptional precision, reliability, and durability in a wide array of industrial applications. As part of the esteemed THK Guide Ball Bushing lineup, this series incorporates meticulously engineered components that facilitate smooth, low-friction linear movement, making it an indispensable solution for machinery requiring high accuracy and repeatability.

Constructed with a high-carbon chromium bearing steel (SUJ2) for both the outer ring and balls, the SC SL SERIES ensures superior hardness and wear resistance, which significantly extends service life even under demanding operational conditions. The bushings feature a retainer that maintains precise ball spacing, minimizing friction and preventing skewing during motion. This design not only enhances operational smoothness but also reduces noise and vibration, contributing to a quieter and more stable machine environment. The inclusion of a seal plate or seal ring on both ends effectively prevents the ingress of contaminants such as dust, chips, and moisture, while retaining lubrication to maintain optimal performance over time. Available in both open-type (SC) and closed-type (SL) variants, the series offers flexibility in mounting and application; open-types allow for slight adjustments in alignment, while closed-types provide higher rigidity and load capacity.

Performance advantages of the SC SL SERIES are evident in its ability to handle moderate to high loads with minimal maintenance requirements. The optimized ball groove geometry ensures even load distribution, reducing stress concentrations and enhancing longevity. With low starting and running friction, these linear bushings contribute to energy efficiency and enable high-speed operations without compromising precision. Their compact design allows for space-saving installations, which is critical in modern machinery where real estate is at a premium. Additionally, the series is designed for easy integration with standard shafts, simplifying assembly and reducing overall system costs.

Typical applications span across diverse sectors, including industrial automation where they are employed in sliding tables, pick-and-place units, and assembly robots to ensure precise positioning and smooth motion. In automotive systems, the SC SL SERIES is utilized in welding equipment, material handling devices, and testing machinery, where reliability under cyclic loads is paramount. For precision equipment, such as medical devices, semiconductor manufacturing tools, and optical instruments, these linear bushings provide the necessary accuracy and stability to maintain tight tolerances. Their versatility also extends to packaging machinery, printing presses, and textile equipment, underscoring their role in enhancing productivity and reducing downtime across industries. By combining robust construction with advanced engineering, the THK SC SL SERIES Linear Bushing sets a benchmark for performance in linear motion systems.

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Model No. Outer dimensions Basic load rating
Height
M
Width
W
Length
L
Dynamic rating
C
Static rating
C0
mm mm mm N N
SL 6UU Linear Bushing
18
30
48
324
529
SL 8UU Linear Bushing
22
34
58
431
784
SL 10UU Linear Bushing
26
40
68
588
1100
SL 12UU Linear Bushing
29
42
70
657
1200
SL 13UU Linear Bushing
30
44
75
814
1570
SL 16UU Linear Bushing
38.5
50
85
1230
2350
SL 20UU Linear Bushing
42
54
96
1400
2750
SL 25UU Linear Bushing
51.5
76
130
1560
3140
SL 30UU Linear Bushing
59.5
78
140
2490
5490