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.
Double row slewing bearings are heavy-duty rotary ring parts with two independent rows of rolling elements (usually steel balls) placed between an inner and outer ring.They safely support heavy axial forces,radial forces,and tilting moment loads all at the same time.
Core Basic Specifications
Materials:Ring forgings adopt 42CrMo & 50Mn alloy steel with full quenching treatment;rolling balls are high-strength GCr15 bearing steel with high surface hardness.Cages include standard carbon steel,high-temperature resistant brass,and lightweight self-lubricating engineering plastic.Size Range:Inner diameter 100-4000mm,outer diameter 150-450mm,overall structural height 50-400mm.Accuracy Grades:P0,P6,P5 industrial precision levels,matching heavy engineering equipment demands.Gear Types:Three standard series available:gearless (020),external gear (021/022),internal gear (023/024) to fit different hydraulic drive layouts.Sealing Solutions:Standard non-contact labyrinth seals for general environments;triple-lip polyurethane contact seals for muddy,dusty,splash-heavy harsh environments.Fluoropolymer seals are optional for special corrosive medical disinfection conditions.Lubrication Modes:Medical-grade low-outgassing sterile grease for clinical equipment operation;circulating oil lubrication for large high-frequency scanning rotary equipment.Standard operating temperature range:-30℃-120℃,customized constant-temperature medical lubricants for indoor hospital environments.Delivery Cycle:Standard in-stock models ship within 7-15 working days;sterile anti-corrosion medical customized versions require separate lead-time negotiation.
Medical Large Precision Equipment refers to large-scale diagnostic,treatment and rehabilitation rotary medical devices used in hospitals,medical examination centers and medical research institutes,mainly including CT scanners,MRI equipment,radiotherapy rotary treatment beds,large digital X-ray rotary frames,medical imaging positioning turntables and multi-axis surgical robot rotary bases.These core medical devices rely on large slewing turntables to complete 360° precise rotation of scanning tubes,patient beds and imaging probes.The rotary bearing system bears the self-weight of large scanning components,eccentric patient load and continuous reciprocating rotation load during long-term clinical use.Medical working environments have strict requirements for cleanliness,disinfection resistance and low noise:equipment needs frequent alcohol and disinfectant wiping,and any bearing vibration,grease volatilization or rotation jitter will affect imaging clarity and diagnosis accuracy.Ordinary bearings have large clearance and high friction noise,and are prone to rust after repeated disinfection,resulting in blurred scanning images and frequent equipment maintenance shutdowns.Therefore,large medical precision rotary equipment must adopt double row slewing bearings with high rigidity,low vibration,sterile lubrication and anti-corrosion surface treatment.
Two-Row Configuration:Features upper and lower raceways that distribute localized stress across dual lines of steel balls or rollers.
Same vs.Different Diameters:Available in same-diameter ball setups for simpler layouts or different-diameter ball designs (larger lower balls) to optimize high tipping-moment resistance.
Integrated Gearing:Frequently built with internal or external gear teeth cut directly into one of the rings to drive 360-degree rotation.
Induction-Hardened Raceways:Raceways are deep-quenched (typically HRC 55–62) to maximize surface wear resistance under severe load.
Construction and Lifting Machinery
Tower and Mobile Cranes:Support heavy lifting loads and allow smooth 360-degree rotation.Excavators and Loaders:Manage heavy digging forces and shifting weights during earth-moving work.Concrete Pumps:Handle steady movement and mechanical stress on job sites.
Renewable Energy Systems
Wind Turbines:Used in yaw and pitch systems to turn the massive blades and nacelle toward the wind.Solar Trackers:Help heavy solar panels follow the sun smoothly across the sky.
Marine and Port Equipment
Ship Cranes and Davits:Resist harsh sea conditions and off-center lifting loads.Port Handling Gear:Support loading and unloading heavy cargo containers safely.
Industrial and Specialty Uses
Rotating Tables:Used in factory assembly lines and heavy manufacturing platforms.Medical Systems:Provide stable,precise rotation in large scanning units such as CT,MRI and radiotherapy rotary treatment beds.
Medical Large Precision Equipment
Large CT scanner rotary frames,MRI gantry rotating supports,radiotherapy treatment turntables,medical X-ray positioning rotary platforms and heavy surgical robot slewing bases all adopt double row slewing bearings as core rotary load-bearing parts,realizing ultra-low vibration,silent and high-repeatability precision rotation under clean hospital clinical environments.
High Rigidity Dual-Row Structure Eliminates Imaging Vibration:CT and MRI gantries carry heavy scanning ray sources and patient beds with uneven body weight,generating continuous eccentric overturning loads during circular scanning.Double rows of steel balls share stress evenly,greatly reducing rotary frame micro-deformation and rotational shake.Zero internal preload clearance ensures stable imaging operation,avoiding blurred medical images caused by vibration and improving clinical diagnosis accuracy.
Medical-Grade Anti-Corrosion & Disinfection Resistant Surface Treatment:Custom stainless steel coating and fluoropolymer triple-lip seals resist repeated wiping by alcohol,disinfectant and medical cleaning fluid.No rust or corrosion occurs after long-term hospital disinfection cycles,effectively preventing bearing metal particles from polluting the clean clinical working chamber and meeting medical hygiene standards.
Low-Noise & Low-Outgassing Medical Lubrication:Special sterile low-volatile medical grease is matched for medical double row slewing bearings,which does not release harmful volatile substances and will not interfere with medical imaging sensors.Ultra-smooth rolling contact greatly reduces rotation noise,creating a quiet examination environment for patients.
High Repeat Positioning Accuracy for Precise Therapy:Factory preloading completely eliminates bearing clearance,achieving micron-level repeated indexing accuracy of rotary turntables.Radiotherapy equipment can accurately lock the lesion position during multi-angle rotary treatment,ensuring precise radiation dose delivery and improving the safety of tumor treatment.
Long Fatigue Life Reduces Hospital Equipment Downtime:42CrMo fully quenched inner and outer rings have excellent anti-fatigue performance,adapting tens of thousands of daily scanning rotation cycles in 24-hour uninterrupted medical work.Less frequent bearing replacement reduces hospital equipment maintenance costs and avoids suspended diagnosis and treatment services.
Compact Integrated Design Optimizes Medical Equipment Layout:A single double row slewing bearing replaces multiple groups of combined bearing structures,reducing the overall thickness of medical rotary gantries.The slim rotary structure effectively controls the overall volume of large scanning equipment,facilitating hospital room layout and equipment transportation installation.
Newbeetrans is a professional manufacturer specialized in customized double row slewing bearings for all kinds of large medical precision diagnostic and treatment equipment.We supply standard stock bearings and sterile anti-disinfection medical-grade customized slewing solutions for medical device manufacturers worldwide.
Full Medical-Grade Inspection Standard:All inner and outer rings adopt integral forging + deep raceway quenching process;every medical dedicated bearing undergoes low-vibration test,low-outgassing grease inspection and disinfectant corrosion aging test before delivery.
Diversified Medical Customization Service:Support stainless anti-corrosion surface treatment,fluoropolymer triple-lip sealing,medical sterile low-volatile grease,internal/external/gearless three gear forms and large-size tailor-made models for CT/MRI rotary gantries and radiotherapy turntables.
Stable Fast Delivery:Standard series bearings are in stock for shipment within 7–15 days;medical customized bearing samples can be finished within 10–15 days based on medical drawing technical standards.
Authoritative Quality Certification:All products comply with ISO 9001 precision bearing standards,and medical hygiene & low-outgassing SGS test reports can be provided upon customer request.
Global One-stop Technical Support:Complete cross-border global logistics service;professional bearing engineers provide load calculation,sealing and lubrication selection guidance for all medical large rotary equipment mechanisms.
For technical specifications,pricing,or custom bearing solutions:
Email:paul@newbeetrans.com
Website:www.newbeetrans.com
WhatsApp
sales@newbeetrans.com
+8615090185276