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.
CRBH Cross Roller Bearings are ultra-precision,high-rigidity bearings featuring cylindrical rollers arranged at right angles between the inner and outer rings.This single-unit design allows them to simultaneously handle complex loads in all directions-radial,axial,and moment.
Core Basic Specifications
Accuracy grades:P5,P4,P2 ultra-precision levels for micron-level positioning
Metric size range:Inner diameter 20–1250 mm,outer diameter 36–1500 mm,cross-section height 8–110 mm;miniature models like CRBH208A with only 8mm cross-section fit tiny robot wrists
Material options:Bearing rings and rollers adopt GCr15 high-carbon chromium steel (surface hardness HRC 60–62) for standard industrial use;SUS440C stainless steel for corrosion-resistant,cleanroom and vacuum working conditions.Cage materials include lightweight Nylon 66,high-strength brass,and customized composite materials
Sealing forms:Open type CRBH-A for clean dust-free environments;double-side contact rubber sealed CRBH-AUU for dustproof and splash-proof in humid,dusty workshop conditions
Lubrication modes:Long-term grease lubrication for ≤120°C and vacuum environments;circulating oil lubrication for ultra-high speed ≤3000 rpm and heavy-load working scenarios
Delivery cycle:Standard stock models 7–15 days;customized non-standard specifications require separate negotiation on production lead time
Articulated six-axis robots are traditional industrial arms with six rotational joints,mimicking a human arm's shoulder,elbow,and wrist.Collaborative robots (cobots) are a subset of these,designed with built-in safety sensors to work safely alongside humans without safety cages.
Articulated Six-Axis Robots
Articulated six-axis robots are the standard workhorses of modern manufacturing.Because each joint represents a degree of freedom,these robots can maneuver workpieces and tools into complex positions from almost any angle.
Capabilities:High payload capacity,rapid speeds,and exceptional precision.They range from handling delicate 3 kg components to moving massive 1000 kg industrial loads.
Common Uses:Spot welding on car chassis,heavy palletizing,material handling,and complex,continuous multi-directional paths.
Safety:Because of their speed,power,and inability to naturally sense humans,they are often locked behind physical safety cages and fences.
Collaborative Robots (Cobots)
Cobots are a specialized type of articulated robot built with advanced proximity cameras and force/torque sensors.If a cobot unexpectedly bumps into a person,its sensors detect the force and immediately halt operation to prevent injury.
Capabilities:Lightweight,highly flexible,and intuitive to program by manually guiding the arm through the desired motions.Most cobots handle lighter payloads ranging from 3 kg to 20 kg.
Common Uses:Machine tending,screwdriving,gluing,polishing,and light pick-and-place tasks.
Safety:They allow for a shared workspace,eliminating the need for bulky safety cages.
Multi-Directional Load Capacity:Cylindrical rollers are arranged crosswise at 90° angles in a V-groove,allowing a single bearing to handle loads from all directions simultaneously.
Integrated,Non-Separable Rings:Because the inner and outer rings are solid and do not separate,the bearing's performance is unaffected by the surrounding mounting structure.
Smooth Rotation:They utilize separators between the rollers to prevent friction and ensure smooth,stable rotation,even at medium-to-high speeds.
High Precision & Rigidity:The line-contact design between rollers and raceways keeps elastic deformation incredibly small,resulting in superior stiffness and minimal backlash.
Industrial Robotics & Automation:They are the premier choice for articulating robot joints (bases,waists,shoulders,and wrists) and speed reducers,where they provide the precise motion control and rigidity necessary for heavy or delicate tasks.
Machine Tools:Employed extensively in CNC rotary tables,grinding machines,and turning centers where heavy spinning components meet high resistance,they minimize mounting errors and offer high rigidity during operations.
Medical & Imaging Equipment:Their smooth,vibration-free rotation and compact size make them ideal for positioning articulating arms in labs and ensuring the precise rotation of camera or imaging components in CT scanners and MRI machines.
Semiconductor Manufacturing:They deliver the micron-scale precision and repeatability required for pick-and-place systems and wafer handling equipment.
Realize slim,lightweight robot arm design:The single-piece integral thin cross-section structure of CRBH cancels redundant spacer flanges and multiple bearing stacking structures required by traditional bearing combinations,greatly shrinking joint outer diameter and overall arm weight.For collaborative cobots,lightweight joints reduce overall robot self-weight and improve dynamic response speed of multi-axis linkage.
Guarantee micron-level repeated positioning accuracy:High-precision ground raceways and orthogonal cross roller preload structure eliminate bearing internal clearance.Under long-cycle continuous operation of six-axis robots,minimal rotation runout ensures consistent repeated positioning of end grippers,avoiding product assembly errors and workpiece scrapping caused by joint jitter.
Improve robot motion stability under complex loads:Six-axis robots generate variable radial,axial and moment loads during stretching,lifting and rotating.CRBH single-bearing composite load bearing capacity evenly disperses multi-directional stress,preventing micro deformation of joints under heavy torque,and stabilizing the movement trajectory of welding,polishing and assembly operations.
Extend robot service life and lower maintenance frequency:GCr15 bearing rings and rollers with surface hardening treatment improve fatigue resistance by 30%.Low-friction polished roller surfaces reduce friction loss and heat accumulation.CRBH sealed UU types isolate workshop dust,cutting fluid and metal debris,effectively reducing bearing wear and prolonging robot service cycle,cutting production line downtime caused by joint maintenance.
Simplify robot mechanical design and assembly process:Compared with RB split outer ring bearings requiring independent preload adjustment,CRBH integrated inner and outer rings have fixed preload performance after production,reducing design difficulty of robot joint housings and cutting assembly and calibration time for robotic arm manufacturers.Customizable material,sealing and lubrication schemes can match diversified six-axis robot and cobot working scenarios without extra structural modification.
Meet human-machine safety standards for collaborative cobots:Ultra-smooth low-torque rotation of CRBH reduces sudden impact resistance during human-machine contact;compact thin-wall structure avoids excessive joint protrusions,optimizing the safety outline design of collaborative robots working alongside operators.
Newbeetrans is a professional precision cross roller bearing manufacturer focusing on CRBH series integrated cross roller bearings for six-axis articulated robots and collaborative cobots.We provide full-size standard CRBH stock and targeted customized bearing solutions for robotic joint manufacturers
Full precision control:All raceways and cylindrical rollers undergo ultra-precision grinding to reach P5,P4 and P2 ultra-high precision standards.Every finished bearing passes strict rotation runout,rigidity and low-jitter inspection before delivery.
Diverse customized capacity:Support SUS440C stainless steel anti-corrosion versions,ceramic roller hybrid bearings,vacuum low-outgassing lubrication treatment,non-standard inner/outer diameter cross-section sizes and special brass cage high-strength customized models for robot joints.
Stable fast delivery:Standard CRBH series in stock for 7–15 days shipment;customized robot special bearings can complete sample delivery within 10–15 days according to drawing complexity.
Authoritative quality certification:All CRBH bearings comply with ISO 9001 and GB/T 307.1 precision bearing standards,and official SGS inspection test reports can be provided upon client request.
Global one-stop service:Complete multi-channel global logistics support to deliver CRBH bearings to robot manufacturers worldwide,with professional technical engineers providing joint bearing selection and installation matching guidance.
For technical specifications,pricing,or custom bearing solutions:
Email:paul@newbeetrans.com
Website:www.newbeetrans.com
WhatsApp
sales@newbeetrans.com
+8615090185276