NewBee Machinery is a professional machinery parts manufacturer providing high quality precision bearings, high-quality non-standard transmission components, and intelligent CNC equipment and more.
NewBee Machinery is a professional machinery parts manufacturer providing high quality precision bearings, high-quality non-standard transmission components, and intelligent CNC equipment and more.
Precision RU Crossed Roller Bearings are compact,high-rigidity rotational bearings featuring cylindrical rollers arranged at 90° angles in a V-groove.Unlike traditional bearings,their unique cross-pattern allows a single bearing to simultaneously handle complex multi-directional loads-including radial,axial,and moment (tilting) forces.These bearings are available in P5,P4 and P2 precision grades.The inner diameter ranges from 10mm to 350mm,the outer diameter from 52mm to 540mm,and the cross-section height varies between 8mm and 45mm.The mounting holes support specifications from M3 to M12.For materials,bearing rings and rollers are made of GCr15 high-carbon chromium steel with a surface hardness of HRC 60-62,or corrosion-resistant SUS440C stainless steel.Nylon 66 or high-strength brass is selected as the cage material.Two main sealing types are provided:open type for clean working environments and U/UU contact rubber seal for dust and splash resistance.In terms of lubrication,both standard grease lubrication and circulating oil lubrication for heavy-duty use are available.Standard RU models can be delivered within 7–15 days,while customized products will be scheduled according to specific technical requirements.
Coordinate Measuring Machines (CMM) and precision testing instruments are core high-precision metrology equipment used in automotive,aerospace,semiconductor,mold and 3C industries.CMMs rely multi-axis rotary probe heads and rotating worktables to perform three-dimensional geometric dimension measurement,form and position tolerance detection of complex workpieces.Precision testing instruments cover roundness testers,optical comparators,laser scanning detectors,gear inspection machines and automatic precision rotary test benches.All rotary probe joints,specimen rotary platforms and swing positioning spindles of these devices are pre-assembled with micro servo motors and miniature reducers before bearing installation.During long-cycle measurement and testing,rotary components bear the weight of probes and test pieces as well as frequent alternating overturning moments.Metrology equipment puts forward extremely strict standards for bearings:nanoscale rotational stability,ultra-low vibration,zero particle shedding and long-term precision retention.Any slight bearing jitter or rotation runout will lead to measurement deviation,invalid test data and misjudgment of product quality,so bearing rigidity,precision and environmental adaptability directly determine measurement accuracy and equipment reliability.
Multi-Directional Load Capacity:Because the cylindrical rollers are alternately crossed at right angles,a single bearing can support radial,axial,and tilting moment loads at the same time.
Integrated Mounting Design:Unlike traditional bearings,RU series inner and outer rings are fully integrated.They include pre-drilled mounting holes,eliminating the need for a separate presser flange or fixing housing.
High Rigidity and Accuracy:Bearings are preloaded,minimizing elastic deformation under heavy loads and ensuring high running accuracy (often up to P5,P4,or P2 grades).
Space and Weight Efficiency:By consolidating multiple bearings into a single compact unit,equipment size and weight can be significantly reduced.
Stable Rotational Torque:Equipped with spacer retainers between the rollers,they offer a low friction coefficient,resulting in highly stable,smooth rotational torque.
Industrial Robotics:Found in basic motion parts such as robot waists,elbows,and rotary joints.Their rigidity allows them to support heavy moment loads at high speeds.
Precision Machine Tools:Utilized in rotary tables,index heads,and spindles for CNC machines and machining centers.
Semiconductor Fabrication:Provide the micron-scale accuracy required for wafer transfer robot arms,photolithography machines,and precise rotary indexing.
Medical & Lab Equipment:Built into rotating parts of advanced diagnostic tools like CT scanners,MRI machines,and robotic surgery components.
Optical & Measuring Instruments:Employed in high-precision astronomical telescopes,CMM (Coordinate Measuring Machines) rotary tables,and laser measuring devices.
Simplify Compact Metrology Equipment Assembly:The integrated RU bearing body with prefabricated PCD mounting holes can be directly bolted to CMM rotary probe heads and test instrument turntables without extra bearing seats or auxiliary flanges.It can be mounted on pre-installed micro servo spindles without dismounting existing drive components,greatly simplifying the ultra-miniature structural design of measuring equipment and shortening equipment assembly and precision calibration cycles.
Stably Bear Multi-Axis Composite Measuring Loads:A single RU bearing replaces multiple groups of ordinary bearings to simultaneously bear probe self-weight,workpiece pressure and continuous rotation overturning moment.Even load distribution avoids spindle micro-deformation during long-hour repeated measurement,maintaining the flatness of the test platform and consistent probe rotation track.
Eliminate Micro-Jitter to Ensure Measurement Accuracy:Preloaded high-rigidity structure and ultra-low rotational runout effectively restrain micro-vibration during slow-angle indexing and scanning rotation.Constant smooth low-torque operation eliminates measurement noise and data drift caused by tiny shaking,realizing repeatable micron-level accurate detection of tiny workpieces and complex curved surfaces.
Adapt Miniaturized Measuring Machine Layout:Ultra-thin lightweight cross-section reduces the overall volume and rotational inertia of CMM probe rotating mechanisms and test turntables,improving dynamic response speed during multi-angle scanning and realizing flexible full-surface automatic measurement.
Adapt Dust-Free Constant-Temperature Metrology Labs:Custom low-outgassing,clean-grade special lubricants and stainless steel RU bearing options adapt to constant-temperature,dust-free measurement laboratory environments.Sealed variants block fine dust to prevent probe and optical lens contamination,meeting long-term stable metrology demands.
Reduce Equipment Calibration & Maintenance Frequency:High-hardened raceways and rollers deliver outstanding anti-fatigue and anti-wear performance,maintaining original precision after millions of measurement cycles.Stable long-term performance cuts regular equipment calibration times and production line downtime,improving testing throughput for manufacturers.
Newbeetrans is a professional manufacturer specializing in RU crossed roller bearings.We deliver customized bearing solutions tailored for CMM rotary probe heads,optical testing turntables and all types of precision measuring instruments.
Metrology Equipment Customization:Develop low-vibration,low-particle RU bearings with constant-temperature stable clean lubricants and full stainless steel versions as requested; customized samples can be delivered within 10–15 days.
Strict Precision Manufacturing:All raceways and rollers adopt super-fine grinding to meet P5,P4 and P2 ultra-precision standards.Every bearing undergoes full dimensional and low-jitter inspection before delivery.
Efficient Global Delivery:Standard RU bearings are in stock for quick shipment,and we provide complete multi-channel global logistics services for worldwide clients.
Authoritative Quality Certification:Our products comply with ISO 9001 and GB/T 307.1 standards,and official SGS inspection reports can be provided upon request.
For technical specifications,pricing,or custom bearing solutions:
Email:paul@newbeetrans.com
Website:www.newbeetrans.com
WhatsApp
sales@newbeetrans.com
+8615090185276