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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Description
Specifications
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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
	Basic Size (mm)				Mounting hole size (mm)			Axial load		Radial load		Weight
	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
Bearing NO.	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

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.

More About Us Ukl Bearing Manufacturing Co.,Ltd

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