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.
Grinders refer to surface grinders,tool grinders,internal/external cylindrical grinders and optical profile grinders that rely abrasive wheels to machine ultra-precise parts with ultra-low surface roughness.Precision dividing heads are core indexing accessories mounted on grinders, milling and machining equipment, used to clamp workpieces and rotate them to fixed equal angular positions for batch symmetrical grinding of gear teeth, splines, hexagonal profiles, cutting tools and cam contours.During grinding cycles, grinder dividing heads bear multiple complex loads: the radial grinding cutting force from abrasive wheels, axial clamping pressure from workpiece chucks, and large overturning moment caused by eccentric heavy workpieces.The grinding workshop is filled with cooling cutting fluid, fine abrasive dust and metal powder, bringing strict challenges to bearing dust resistance and corrosion resistance.Meanwhile, precision machining requires the dividing spindle to maintain ultra-low rotation runout, zero micro-vibration and repeatable micron angular indexing accuracy.Even tiny bearing deformation or jitter will produce grinding chatter marks, uneven surface texture and out-of-tolerance angular division, leading to scrapped precision parts.Grinder precision dividing heads cover universal tilting dividing heads, optical high-precision dividing heads, small tool grinding dividing heads and large heavy-duty dividing heads for gear grinding machines, all of which require high-rigidity rotary bearing support as their core spindle component.
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.
Grinder & Precision Dividing Heads:Serve as the core spindle rotary bearing for all types of grinding machine dividing heads, including tool grinder dividing spindles, optical precision dividing units, gear grinding indexing heads and tilting universal dividing heads, providing integrated multi-load bearing and ultra-stable precision indexing performance for grinding processing.
Resist complex grinding composite loads to eliminate spindle deflection:Grinding processing generates continuous alternating radial abrasive cutting force, axial chuck clamping load and workpiece overturning moment.A single CRBH bearing replaces multiple sets of traditional bearings to bear all three types of loads synchronously.Its orthogonal cross roller layout boosts anti-deformation rigidity 3-4 times, effectively suppressing spindle bending deflection during heavy grinding, avoiding chatter vibration and uneven grinding textures on workpiece surfaces.
Guarantee micron-level repeat indexing precision for symmetrical grinding:CRBH adopts super-finished raceways and factory preloaded design to eliminate internal bearing clearance, achieving P4/P2 ultra-high rotation accuracy.For long-cycle repeated indexing of dividing heads, ultra-small radial and axial runout ensures consistent angular positioning every time, perfectly meeting the tolerance requirements of gear tooth equal division, cutter flank symmetrical grinding and multi-angle cam forming, completely solving cumulative indexing error problems caused by ordinary bearings.
Adapt harsh grinding workshop working environments:The CRBH-AUU double-sided contact rubber sealing structure effectively blocks grinding abrasive dust, metal filings and cooling cutting fluid from invading the bearing interior, preventing raceway corrosion and roller abrasion.For optical precision grinders with cleanroom requirements, open CRBH-A matched with clean low-outgassing grease can be selected; SUS440 stainless steel customized versions support long-term use under corrosive water-based cutting fluid conditions, greatly extending bearing service life.
Compact thin-wall design simplifies dividing head mechanical structure:Compared with split outer ring RB bearings or combined ball bearing assemblies, CRBH integrated thin cross-section cancels redundant positioning flanges and multi-bearing stacking structures.It greatly reduces the overall spindle thickness of dividing heads, saves internal installation space for grinders, lowers spindle rotary inertia, and improves the dynamic response speed of fast indexing switching between grinding stations.
Reduce equipment calibration frequency and cut production downtime:GCr15 bearing rings and rollers undergo surface hardening treatment to lift fatigue resistance by 30%, maintaining original precision after millions of indexing and grinding cycles.Low-friction polished roller end faces reduce operating temperature rise (≤15°C) and wear loss.Stable long-term precision performance cuts regular dividing head calibration and bearing replacement frequency, improving continuous machining efficiency of grinder production lines.
Newbeetrans is a professional precision cross roller bearing manufacturer focusing on CRBH series integrated cross roller bearings for grinders and precision dividing heads.We provide full-size standard CRBH stock and targeted customized bearing solutions for grinding machine and tool fixture 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 SUS440 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 various grinding dividing head spindles.
Stable fast delivery:Standard CRBH series in stock for 7-15 days shipment;customized grinder 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 grinding equipment manufacturers worldwide,with professional technical engineers providing bearing selection and installation matching guidance for dividing head spindle projects.
For technical specifications,pricing,or custom bearing solutions:
Email:paul@newbeetrans.com
Website:www.newbeetrans.com
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sales@newbeetrans.com
+8615090185276