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SX Crossed Roller Bearings

SX Crossed Roller Bearings high precision rotary table bearing product photo
SX crossed roller bearings feature a separable outer ring and integrated inner ring, offering high rotational accuracy for precision machinery. Their compact structure makes them ideal for indexing tables and high-precision rotary equipment. Compared with other types, SX bearings reduce deformation during installation, ensuring long-term performance and rigidity.
Total 13 Results
Part Number
Bore Dia
Outer Dia
Width
Height (H)
Internal Diameter On Outer Ring
Diameter Of Bearing Raceway
External Diameter On Inner Ring
Height Of Individual Ring(h)
Height Of Individual Ring Lower Tolerance
Rmin
S
Weight
SX011814-A
70 mm
90 mm
10 mm
10 mm
80.5 mm
80 mm
79.5 mm
10 mm
-0.01 mm
0.6 mm
1.2 mm
0.25 Kg
SX011818-A
90 mm
115 mm
13 mm
13 mm
102.5 mm
102 mm
101.5 mm
13 mm
-0.01 mm
1 mm
1.2 mm
0.354 Kg
SX011820-A
100 mm
125 mm
13 mm
13 mm
112.5 mm
112 mm
111.5 mm
13 mm
-0.01 mm
1 mm
1.2 mm
0.402 Kg
SX011824-A
120 mm
150 mm
16 mm
16 mm
135.6 mm
135 mm
134.4 mm
16 mm
-0.01 mm
1 mm
1.5 mm
0.698 Kg
SX011828-A
140 mm
175 mm
18 mm
18 mm
157.7 mm
157 mm
156.3 mm
18 mm
-0.01 mm
1 mm
1.5 mm
1.062 Kg
SX011832-A
160 mm
200 mm
20 mm
20 mm
180.8 mm
180 mm
179.2 mm
20 mm
-0.025 mm
1.1 mm
1.5 mm
1.581 Kg
SX011836-A
180 mm
225 mm
22 mm
22 mm
202.8 mm
202 mm
201.2 mm
22 mm
-0.025 mm
1.1 mm
2 mm
2.22 Kg
SX011840-A
200 mm
250 mm
24 mm
24 mm
225.8 mm
225 mm
224.2 mm
24 mm
-0.025 mm
1.5 mm
2 mm
2.957 Kg
SX011848-A
240 mm
300 mm
28 mm
28 mm
270.8 mm
270 mm
269.2 mm
28 mm
-0.025 mm
2 mm
2 mm
4.96 Kg
SX011860
300 mm
380 mm
38 mm
38 mm
340.8 mm
340 mm
339.2 mm
38 mm
-0.05 mm
2.1 mm
2.5 mm
11.6 Kg
SX011868
340 mm
420 mm
38 mm
38 mm
380.8 mm
380 mm
379.2 mm
38 mm
-0.05 mm
2.1 mm
2.5 mm
12.92 Kg
SX011880
400 mm
500 mm
46 mm
46 mm
451 mm
450 mm
449 mm
46 mm
-0.05 mm
2.1 mm
2.5 mm
23.221 Kg
SX0118/500
500 mm
620 mm
56 mm
56 mm
516.2 mm
560 mm
558.8 mm
560 mm
-0.05 mm
3 mm
2.5 mm
42.7 Kg
SX Crossed Roller Bearings applied in precision rotary indexing tables

High Rotation Accuracy for Precision Applications

SX Crossed Roller Bearings are designed for environments where precision and consistency in rotation are crucial. With a separable outer ring and a one-piece inner ring, they are specifically made for inner ring rotation. This design reduces internal stress and maintains alignment during installation, which is essential for achieving stable rotation accuracy over time.

In applications like rotary indexing tables, semiconductor production equipment, and precision inspection systems, even the smallest deviation in movement can lead to significant performance issues. SX bearings solve this challenge by ensuring that the inner ring remains concentric and rigid, even under dynamic loads and varying speeds. This makes them ideal for any situation where continuous and accurate inner ring rotation is necessary.

Another key advantage is their ability to maintain accuracy without requiring complex or high-tolerance mounting systems. Compared to other models like the RA or RB types, SX bearings offer more resistance to torque variation during operation. This is particularly important for automated equipment, CNC machines, and robotics, where every movement needs to be repeatable, predictable, and free from vibration.

Compact Design for Limited Space Installations

In modern engineering applications, saving space without compromising on performance is a constant challenge. SX Crossed Roller Bearings provide a solution with their ultra-compact, lightweight design, making them ideal for applications with strict space limitations. The inner ring is a single piece, while the outer ring consists of two half-rings, connected radially to ensure assembly integrity without increasing overall dimensions.

This makes SX bearings a key component in thin section bearing applications such as aerospace control systems, surgical robotic arms, and compact automation units, where even millimeters of saved space can significantly improve equipment layout and function. Despite their thin structure, SX bearings offer excellent rigidity and radial/axial load handling capacity, far exceeding conventional ball bearings in both load distribution and lifespan.

The precise raceway grinding and inclusion of spacers between rollers reduce friction, minimize torque, and extend service life even in high-speed or high-cycle environments. Compared to standard configurations, SX designs help engineers achieve a balance between compactness and structural integrity.

Various precision applications of SX Crossed Roller Bearings

Application Versatility of SX Crossed Roller Bearings

SX crossed roller bearings are used in a wide range of high-precision industrial applications. From indexing tables and medical equipment to optical machines, these bearings excel wherever precise inner ring rotation is critical.

Thanks to the radial connecting ring that holds the two outer ring halves together, installation is easy and performance is stable. This structure ensures minimal torque fluctuation and high rigidity under varying loads.

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FREQUENTLY ASKED QUESTIONS

What are the main advantages of SX Crossed Roller Bearings?

The main advantages of SX crossed roller bearings are their high precision, rigidity, and compact design. The unique structure, with a one-piece inner ring and a two-piece outer ring, allows for high rotational accuracy, especially for inner ring rotation applications. This design is also very space-efficient, which is critical for applications where size and weight are a concern. Additionally, these bearings can support heavy radial, axial, and moment loads simultaneously, making them highly versatile and robust for demanding applications like rotary table bearings and robot bearings.

How do SX Crossed Roller Bearings differ from RB Crossed Roller Bearings?

While both SX and RB types have separable outer rings and are used for inner ring rotation, there are subtle differences in their design and application. The RB series is often considered the basic type of crossed roller bearings and uses bolts or rivets to fix the outer ring halves. The SX series, on the other hand, uses a radial connecting ring for this purpose. The SX type is specifically designed with minimized dimensions for space-constrained applications. Both are excellent for high precision bearings applications on machine tool indexing tables, but the SX might be a better fit when the smallest possible footprint is required.

Can SX Crossed Roller Bearings be used for outer ring rotation?

No, SX crossed roller bearings are specifically designed for inner ring rotation. The structure with the separable outer ring and one-piece inner ring is optimized for this type of motion. For applications that require the outer ring to rotate, you would need to use a different type of crossed roller bearing, such as the XV series, which has a one-piece outer ring and a two-piece inner ring. Choosing the correct bearing type is crucial for ensuring the stability and longevity of the application.

What are some typical SX crossed roller bearing applications?

SX crossed roller bearing applications are typically found in machinery that requires exceptional rotational accuracy and rigidity. Their design makes them ideal for the indexing tables of machine tools, where they provide precise and stable rotation. They are also widely used in robot bearings, particularly in the joints and swivels of robotic arms, where they support complex loads and ensure smooth movement. Additionally, they are used in medical equipment, measuring instruments, and precision test equipment where high precision and compact size are paramount.
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