Cross Roller Bearing

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High-Precision Cross Roller Bearings--CAGRI Bearings

Product Overview

CAGRI Bearings is a premier supplier of high‑performance Cross Roller Bearing solutions. Specifically, this compact, high‑precision bearing features rollers arranged orthogonally at 90° between the inner and outer rings, achieving true multi‑directional load bearing through optimized line contact.

To address diverse application demands, our core lineup is organized into nine major series:

XRA / XRA-C Series – Standard cross roller bearings
XRB / XRBC / XRBH Series – High‑rigidity configurations
XRC Series – Super‑slim designs for space‑constrained applications
XRE Series – Slim cross roller bearings
XRT Series – Cross tapered roller bearings
XRU / XRUS Series – Units with integrated mounting holes
RB Series – Robot‑specific cross roller bearings
RU Series – Robot‑specific high‑precision bearings

Consequently, these cross roller bearing series collectively cover the full spectrum of requirements—from ultra‑high rigidity and space‑saving slim profiles to robot‑dedicated adaptations—ensuring an optimal match for your most demanding positioning and motion control tasks.

What is EMQ bearings?

The Cross Roller Bearing is a precision transmission component capable of simultaneously withstanding radial loads, axial loads, and overturning moments. Specifically, its line‑contact design between rollers and raceways minimizes load‑induced elastic deformation, making it the “industrial heart” of high‑end equipment.

As a result, this bearing type is widely integrated into equipment demanding both high rigidity and precision. Core applications include industrial robot joint rotation parts, CNC machine tool turntables, semiconductor wafer processing equipment, and medical imaging instruments.

In terms of specific product adaptation:

XRE Series cross roller bearings match UAV gimbals and small testing instruments.
XRBH Series cross roller bearings fit 5‑axis machining center spindles.
XRA Series—with its built‑in mounting‑hole design—simplifies the assembly of precision rotary tables.
RB Series robot bearings are specially designed for collaborative robot shoulder joints.
RU Series robot bearings are adapted for industrial robot wrist and elbow joints, optimizing both low‑speed stability and impact‑load resistance for high‑frequency start‑stop and complex attitude adjustments.

Furthermore, with digital twin technology, select high‑end models—such as the XRT series cross tapered roller bearings and advanced RU variants—can integrate condition‑monitoring functions to provide real‑time feedback on operating parameters like temperature and vibration.

CAGRI EMQ Ball Bearing Advantages

CAGRI Cross Roller Bearing products build five core competitive advantages through advanced manufacturing technology. All series—including XRA/XRA‑C, XRB/XRBC/XRBH, RB/RU, and others—benefit from the following features.

Ultimate Rigidity and Load Capacity

The cross‑arranged roller design increases rigidity by over 50% compared to ordinary bearings, enabling simultaneous bearing of multi‑directional composite loads. Specifically, the XRBH Series excels in heavy‑load scenarios such as wind turbine main shafts. Additionally, RB/RU series robot bearings feature an optimized roller contact angle tailored to joint load characteristics, increasing impact load resistance by 40%.

Ultra‑Precision Rotation Performance

The entire series adopts a precision grinding process and integrated ring design, achieving P2‑grade accuracy. For example, XRC series crossed roller bearings meet the sub‑micron positioning requirements of semiconductor lithography machines. Meanwhile, RB/RU series robot bearings deliver repeat positioning accuracy within 0.002 mm through ultra‑precision machining, adapting to high‑precision robotic operations.

Compact and Lightweight Structure

As a representative of super‑slim designs, the XRE Series cross roller bearing features a section height of only 5.5 mm, making it 38% lighter than traditional models. Furthermore, the RB/RU series robot bearings adopt integrated stamping cages, which are 25% lighter than comparable products—helping to improve robot payload capacity and reduce energy consumption.

Long‑Term Durability

The entire series is manufactured from high‑quality GCR15SiMn steel with specialized heat treatment, complemented by liquid crystal lubrication technology. Consequently, the service life reaches 2–3 times that of ordinary bearings. Notably, the XRU/XRUS series exhibits zero lubricant volatilization loss even at 100 °C, while the RB/RU series robot bearings utilize long‑life grease, extending the maintenance‑free period to 8,000 hours.

Easy Installation and Adaptability

Regarding installation convenience, XRA‑C and XRBC Series incorporate built‑in mounting holes and anti‑separation structures, allowing direct bolt fixing without complex bearing housings. Similarly, the RB/RU series robot bearings come equipped with dedicated mounting bushings and positioning pins, enabling modular assembly into robot joints and rapid integration across different robot brands. As a result, the entire series is suitable for a wide range of scenarios—from industrial robots to medical equipment.

Application

Industrial Robotics
Robot Joints	6 -axis collaborative robot shoulder joints (RB series), industrial robot elbow/wrist joints (RU series), humanoid robot waist rotation units, palletizing robot arm connecting shafts
End Effectors	Precision gripping manipulator rotating bases, welding robot wrist drive units

Machine Tools
CNC Turntables	5-axis machining center rotary tables, vertical lathe precision indexing plates
Spindle Supports	High-speed grinder spindle bearing sets, boring machine rotating shaft support units

Semiconductor & Electronics
Wafer Processing	Lithography machine wafer transfer robot joints, wafer inspection equipment rotary platforms
Precision Instruments	IC packaging equipment rotating stations, electron microscope sample stages

Medical Equipment
Imaging Devices	CT machine rotating scanning frame, MRI patient bed drive shaft
Surgical Tools	Laparoscopic surgical robot joints, ophthalmic precision operating table rotation units