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.
Special-purpose machine tools are customized and dedicated machining equipment designed to perform specific processing tasks for particular workpieces,production processes or industrial sectors.Different from general CNC machine tools,they are tailor-made for mass production,special-shaped part machining and unique technological requirements,and are widely used in automotive parts,aerospace components,electronic hardware,and pipeline accessory industries.Common types include special drilling machines,tapping machines,profiling machines,dedicated cutting equipment and multi-station combined processing machines.The rotary shafts,indexing turntables and swing mechanisms of special-purpose machine tools are usually pre-assembled with gears,reducers and servo units before bearing installation.During long-term continuous production,these rotary components bear stable heavy loads,frequent alternating impact and overturning moments.Meanwhile,the working environment is filled with metal chips,cutting fluid mist and industrial dust.Therefore,the supporting bearings must feature outstanding load capacity,ultra-high rotational precision,strong structural rigidity and reliable sealing performance.The performance of bearings directly affects the machining accuracy,product yield and long-term stable operation of the whole production line.
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 Fabric: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 Modular Assembly & Maintenance:The integral structure with pre-drilled mounting holes enables direct bolt connection on the spindle of special-purpose machine tools.It can be installed on pre-assembled spindles equipped with gears and reducers without removing existing components.This greatly simplifies the equipment assembly process,shortens production cycles,and lowers the later maintenance difficulty and cost for machine tool manufacturers.
Withstand Complex Combined Loads:A single RU crossed roller bearing replaces multiple traditional bearing assemblies.It stably bears radial force,axial force and overturning moment generated during workpiece processing.The reasonable force distribution avoids local stress concentration and structural deformation,and reinforces the overall structural stability of the machine tool’s rotary mechanism under long-term heavy-load operation.
Ensure Consistent Machining Quality:The preload design and ultra-low rotational runout effectively restrain micro-vibration during rotation and indexing.It maintains excellent positioning accuracy,preventing dimensional errors,burrs and surface defects of processed workpieces.Stable rotational torque ensures uniform processing effect for mass production,effectively improving product qualification rate.
Optimize Equipment Structural Layout:The ultra-thin and compact profile fits the compact internal design of customized special-purpose machine tools.It reduces the weight and motion inertia of rotary parts,improves the dynamic response speed of the equipment,and makes the machine tool operate more flexibly during repeated processing cycles.
Adapt to Harsh Workshop Conditions:Optional U/UU rubber sealing structure effectively isolates metal chips and splashing cutting fluid.Matched with dedicated lubricants,the bearings can operate stably for a long time in dusty and humid processing environments,effectively preventing component wear and failure caused by environmental pollution.
Extend Service Life & Boost Production Efficiency:Excellent fatigue resistance and impact resistance enable the bearings to adapt to 24-hour uninterrupted cyclic production.It reduces the frequency of bearing replacement and unexpected equipment downtime,ensures the continuous progress of mass processing tasks,and greatly improves the overall production capacity of the workshop.
Newbeetrans is a professional manufacturer specializing in RU crossed roller bearings.We deliver customized bearing solutions tailored for special-purpose machine tools and various high-precision rotary machinery.
Special-Purpose Machine Tool Customization:We develop high-rigidity,impact-resistant RU bearings with enhanced dust and liquid-proof sealing and dedicated long-life lubricants.Full stainless steel versions are available on request,and 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 precision standards.Every product undergoes full dimensional inspection to guarantee reliable quality.
Efficient Global Delivery:Standard RU bearings are in stock for quick shipment,and we provide complete multi-channel global logistics services for overseas customers.
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