XSU Crossed Roller Bearings

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XSU Crossed Roller Bearings

XSU Crossed Roller Bearings (Integrated Inner and Outer Rings)

XSU crossed roller bearings have mounting holes machined integrally on both the inner and outer rings, eliminating the need for additional mounting flanges and support seats. Their integrated inner and outer ring structure ensures that installation has virtually no impact on bearing performance, providing stable rotational accuracy and torque output. Suitable for applications where either the outer or inner ring rotates.

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Structural Features
·Utilizes a crossed roller structure, with cylindrical rollers arranged vertically on a 90° V-groove rolling surface separated by isolation blocks, allowing simultaneous bearing of radial, axial, and torque loads.
·Compact inner and outer ring dimensions, with an ultra-thin design approaching the limits of miniaturization, combining high rigidity with high precision grades of P5, P4, and P2.

Applications
Suitable for industrial robot joints and rotating parts, machining center rotary tables, precision rotary platforms, and high-end equipment in medical devices, military applications, and IC manufacturing plants.

Bearing NO. Basic Size
(mm)		 Mounting hole size
(mm)		 Basic load rating(Kn) Weight
Axial load Radial load
D d Di da La Li nB Ca dynamic load Coa static load Cr dynamic load Cor static load Kg
XSU080168 205  130  174  159  190  145  12  66  240  42  119  3.3 
XSU080188 225  150  194  179  210  165  16  71  275  46  133  3.7 
XSU080218 255  180  224  208  240  195  20  77  315  49  154  4.3 
XSU080258 295  220  264  249  280  235  24  84  375  54  182  5.1 
XSU080318 355  280  324  309  340  295  28  93  465  59  223  6.3 
XSU080398 435  360  404  389  420  375  36  106  590  68  285  7.8 

Bearing NO. Mounting hole size
(mm)		 Rotation accuracy Internal clearance Weight
Da d La nB Li Di da A B C D Preload Kg
XSU140414 484  344  460  24  368  415  413  0.04  0.04  0.06  0.06  0.01-0.03 28 
XSU140544 614  474  590  32  498  545  543  0.04  0.04  0.07  0.07  0.01-0.03 38 
XSU140644 714  574  690  36  598  645  643  0.05  0.05  0.08  0.08  0.01-0.04 44 
XSU140744 814  674  790  40  698  745  743  0.05  0.05  0.09  0.09  0.01-0.04 52 
XSU140844 914  774  890  40  798  845  843  0.06  0.06  0.09  0.09  0.01-0.04 60 
XSU140944 1014  874  990  44  898  945  943  0.06  0.06  0.11  0.11  0.01-0.05 67 
XSU141094 1164  1024  1140  48  1048  1095  1093  0.07  0.07  0.11  0.11  0.01-0.05 77 

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Engineering the Future of Motion
About UKL
Founded in 2020, UKL Bearing Manufacturing Co., Ltd. (Wuxi) is China XSU Crossed Roller Bearings suppliers and OEM/ODM XSU Crossed Roller Bearings company, an integrated industrial and trading enterprise that focuses on precision manufacturing, combining R&D, production, and sales.
The company specializes in high-performance bearing solutions, providing technical support for global industries with exceptionally high demands for precision and reliability.

With more than 200 skilled professionals and a fully modernized production base, UKL’s facilities cover the entire manufacturing process — forging, annealing, turning, heat treatment, grinding, and automated assembly.
Leveraging over 15 years of OEM/ODM export experience, UKL responds quickly to customer needs, offering flexible and customized services for clients across Europe, Asia, Africa, and the Middle East.

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