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.
4th axis rotary units are core rotary motion modules installed on CNC machining centers,automated assembly stations and multi-axis automation equipment.As the fourth independent rotary degree of freedom,they drive workpieces or fixtures to complete angle indexing,turning and multi-angle cutting,and bear alternating cutting force,workpiece gravity and overturning moment during long-term continuous processing.Conventional bearing combinations often lead to bulky structure,insufficient rigidity and low repeated positioning accuracy,which greatly restricts the processing precision of complex curved parts.Rotary wrists of end-of-arm toolings (EOAT) are the terminal rotating components of industrial robots,collaborative robots and SCARA robots,mounted at the front end of robot arms to connect grippers,dispensing guns,welding torches,polishing tools and other end actuators.They need to realize flexible 360° rotation of the tool end,withstand composite loads such as the self-weight of tools,assembly impact force and dynamic overturning moment during high-speed reciprocating movement,and put forward strict requirements on compact size,light weight,low rotation jitter and long-term precision retention.Both 4th axis rotary units and EOAT rotary wrists belong to high-precision rotary execution units with limited installation space and complex multi-directional loads,which are highly dependent on high-rigidity,compact and high-precision rotary bearings as the core rotating support components.
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 ultra-compact lightweight structure for 4th axis modules and EOAT rotary wrists: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 the overall outer diameter of 4th axis rotary units and robot terminal wrists.For EOAT rotary wrists,the ultra-thin miniature CRBH models (minimum cross-section 8mm) effectively reduce the terminal volume of manipulators,avoid interference between end tools and workpieces during multi-angle rotation,and lower the rotational inertia of rotary wrists to improve the dynamic response speed of robot multi-axis linkage.For machine tool 4th axis rotary units,the compact bearing layout shortens the overall length of the rotary module,optimizing the layout space of machining centers and improving equipment space utilization.
Guarantee micron-level repeated positioning accuracy for indexing and rotation:High-precision ground raceways and orthogonal cross roller preload structure eliminate bearing internal clearance.In long-cycle continuous indexing of 4th axis rotary units and frequent reciprocating rotation of EOAT wrists,minimal rotation runout ensures consistent positioning accuracy.For CNC 4th axis processing,it avoids dimensional deviation of complex curved workpieces caused by rotary jitter; for robot terminal assembly,it eliminates assembly errors and workpiece scrapping resulting from unstable rotation of grippers,dispensing and welding tools.
Stabilize rotary operation under complex composite loads:4th axis rotary units bear variable radial cutting force,axial clamping force and overturning moment during cutting; EOAT rotary wrists suffer alternating moment loads from tool self-weight,rapid acceleration and deceleration,and assembly collision impact.CRBH single-bearing composite load bearing capacity evenly disperses multi-directional stress,preventing micro deformation of rotary support parts under heavy torque.It effectively suppresses rotary vibration during high-speed indexing and reciprocating rotation,stabilizing the processing track of machine tools and the operation trajectory of robot end actuators.
Extend service life and reduce equipment maintenance downtime: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.Sealed CRBH-AUU types installed on 4th axis units isolate cutting fluid,metal dust and iron scraps generated during machining; when applied to EOAT wrists in dusty workshop environments,they block splashing coolant and particulate pollutants,effectively reducing bearing wear.Long-term stable precision reduces regular calibration frequency of 4th axis rotary tables and robot EOAT modules,cutting production line downtime caused by rotary part maintenance.
Simplify mechanical design and assembly calibration process:Compared with RB split outer ring bearings requiring independent preload adjustment,CRBH integrated inner and outer rings have fixed preload performance after production,lowering the structural design difficulty of 4th axis housings and EOAT wrist shells,and shortening assembly and precision calibration cycles for equipment manufacturers.Customizable material,sealing and lubrication schemes can match diversified working conditions: SUS440C stainless steel versions for cleanroom semiconductor EOAT wrists,vacuum low-outgassing lubrication for optical precision 4th axis rotary units,and brass high-strength cages for heavy-load machining 4th axis modules without extra structural modification.
Newbeetrans is a professional precision cross roller bearing manufacturer focusing on CRBH series integrated cross roller bearings for CNC 4th axis rotary units and robot end-of-arm tool rotary wrists.We provide full-size standard CRBH stock and targeted customized bearing solutions for automation equipment and robot EOAT 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 rotary units and EOAT wrists.
Stable fast delivery:Standard CRBH series in stock for 7-15 days shipment;customized special bearings for 4th axis and EOAT 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 automation equipment and robot manufacturers worldwide,with professional technical engineers providing bearing selection and installation matching guidance for 4th axis rotary modules and EOAT rotary wrists.
For technical specifications,pricing,or custom bearing solutions:
Email:paul@newbeetrans.com
Website:www.newbeetrans.com
WhatsApp
sales@newbeetrans.com
+8615090185276