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 compact rotary unit structures.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 with cutting fluid and metal debris 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 and 5th axis rotary tables are core multi-axis functional components of vertical and horizontal CNC machining centers,adding rotational degrees of freedom to standard 3-axis machine tools.
4th Axis Rotary Tables The 4th axis is a single-axis indexing rotary unit mounted on the machine worktable,rotating around the horizontal X/Y axis.It clamps workpieces and performs continuous rotary milling,drilling and tapping,realizing one-clamp multi-face machining of parts such as molds,automotive castings and hydraulic valve bodies.It bears stable radial cutting force,axial clamping force and overturning moment during heavy cutting.
5th Axis Rotary Tables 5-axis rotary tables integrate two orthogonal rotary axes (A/C or B/C axis),supporting arbitrary spatial angle positioning of workpieces.They are widely used in aerospace structural parts,medical implants,precision mold and turbine blade processing.During complex 5-axis simultaneous machining,the rotary table endures alternating multi-directional impact cutting loads,and demands ultra-low rotation runout and high anti-deformation rigidity to guarantee micron-level machining tolerance.
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 Compact Lightweight Rotary Table Structural Design:CRBH adopts integrated thin-wall cross-section structure,eliminating the redundant multi-bearing stacking and auxiliary spacer flanges required by traditional bearing combinations.It effectively reduces the overall thickness and outer diameter of 4/5 axis rotary tables,shortens the cantilever length of the rotary table,reduces rotational inertia,and improves the dynamic response speed of high-speed indexing.For small and medium-sized vertical machining centers with limited Z-axis travel,the ultra-thin section of CRBH greatly optimizes the effective machining stroke of the equipment.
Resist Heavy Cutting Force & Eliminate Rotary Table Chatter Vibration:During milling,boring and drilling of complex workpieces,4/5 axis rotary tables bear alternating radial,axial and overturning moment cutting loads.The orthogonal crossed roller line contact structure of CRBH improves overall rigidity by 3–4 times compared with ball bearings.Even under strong side cutting force,the bearing produces tiny elastic deformation,effectively suppressing rotary table chatter,eliminating workpiece surface ripples and machining dimensional deviation,and stably maintaining machining surface finish and geometric tolerance.
Guarantee Micron-Level Angular Positioning Repeatability:All CRBH raceways and cylindrical rollers are ultra-precision ground to P5/P4/P2 accuracy grades with preloaded internal structure to eliminate bearing clearance.In long-term repeated indexing and continuous 5-axis linkage machining,ultra-low rotation runout ensures consistent angular positioning accuracy of the rotary table,avoiding product scrapping caused by positioning deviation,and meeting the ultra-high precision processing demands of aerospace and precision mold industries.
Adapt Harsh Machine Tool Workshop Environment:CRBH-AUU double-sided contact rubber sealing type effectively blocks metal cutting debris,cutting fluid splash and workshop dust from invading the bearing interior.GCr15 material with surface hardening treatment (HRC 60-62) has 30% higher fatigue resistance,reducing wear caused by cutting particle erosion.Low-friction polished roller end faces lower heat accumulation during continuous rotary operation,avoiding bearing thermal expansion and precision drift during long-hour processing.
Simplify Rotary Table Assembly & Reduce Calibration Workload:Different from RB series split outer ring bearings which need independent preload adjustment,CRBH integrated inner and outer rings complete fixed preload at the factory.Machine tool manufacturers do not need to reserve complex preload adjustment structures on rotary table housings,greatly simplifying mechanical design and shortening assembly and precision calibration cycles of 4/5 axis rotary tables.Customized SUS440C stainless steel,special lubrication and enhanced sealing versions can match wet cutting,long-cycle continuous processing and other special working conditions without extra structural modification of rotary tables.
Extend Service Life & Lower Machine Tool Maintenance Downtime:High-hardness raceway and roller surfaces deliver excellent anti-fatigue and anti-wear performance,maintaining original precision after millions of cutting and indexing cycles.Sealed CRBH bearings reduce the frequency of regular grease replenishment and bearing disassembly maintenance,cutting production line downtime caused by rotary table failure,and improving the overall operation efficiency of CNC machining centers.
Newbeetrans is a professional precision cross roller bearing manufacturer focusing on CRBH series integrated cross roller bearings for 4th and 5th axis rotary tables of CNC machining centers.We provide full-size standard CRBH stock and targeted customized bearing solutions for machine tool rotary table 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 heavy-load machine tool rotary tables.
Stable fast delivery:Standard CRBH series in stock for 7–15 days shipment;customized machine tool 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 machine tool manufacturers worldwide,with professional technical engineers providing rotary table 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