Self-Aligning Double-Row Spherical Roller Bearing for Industrial

Engineered for the most unforgiving industrial environments, this double-row spherical roller bearing represents the pinnacle of precision metallurgy and mechanical craftsmanship. When integrated into massive rotational equipment, the meticulously ground raceways and pressed steel cage operate with a distinct, low-decibel hum, signaling minimal friction and superior internal geometry. The robust cylindrical bore seamlessly mates with heavy-duty shafts, providing a tactile sense of absolute rigidity and unyielding alignment upon installation. By inherently compensating for shaft misalignment and deflection through its flawlessly contoured spherical internal profile, this component directly eliminates the catastrophic risks of edge loading and premature metal fatigue. Industrial operators will immediately notice the reduction in excessive thermal output during continuous cycles, a direct result of optimized roller guidance and viscous fluid dynamics facilitated by the integrated lubrication pathways. The smooth, polished exterior finish not only resists environmental degradation but also reflects the stringent quality control protocols applied during the forging process. This bearing transforms erratic, high-impact vibrations into stabilized, fluid rotational motion, ensuring that critical machinery remains continuously operational, thereby drastically reducing unplanned downtime and maintenance expenditures for massive industrial facilities.

Product Specifications

Dimensions & Mounting

Calculation Factors

Design Features

• Bore Type: Cylindrical bore

• Cage: Pressed steel cage (CC design)

• Lubrication Feature: W33 - Lubrication groove and three holes in outer ring

• Clearance: CN/C0 (Normal clearance group)

• Precision: PN/P0 (Normal precision)

Suffix Meanings

• CC: Improved internal design with pressed steel cage, optimized roller guidance and reduced friction

• W33: Lubrication groove and three evenly spaced holes in outer ring for easy relubrication

Key Features & Highlights

The architectural brilliance of this roller bearing lies in its ability to solve complex rotational challenges while demanding minimal intervention. It is specifically structured to absorb immense stress, transforming potential mechanical failures into smooth, continuous productivity. By integrating advanced lubrication pathways and optimized internal clearances, it targets the core desires of industrial operators: extended lifespan, reduced thermal expansion, and unwavering reliability under duress.

• Friction-Optimized CC Cage: The pressed steel cage is masterfully stamped to guide rollers with microscopic precision, drastically lowering the acoustic footprint and heat generation during high-speed revolutions.

• Integrated W33 Lubrication System: Featuring a precisely machined circumferential groove and three equidistant holes on the outer ring, this design allows for rapid, uniform fluid distribution, cutting maintenance downtime by hours.

• Dimensional Stability: Subjected to specialized metallurgical stabilization, the steel components retain their exact geometric tolerances even when exposed to continuous 200°C environments.

• Omnidirectional Load Mastery: The inclined raceway geometry flawlessly distributes both massive radial weight and bidirectional axial thrust, preventing localized metal wear.

Material & Heat Treatment

The foundation of true mechanical endurance begins at the molecular level. We utilize exceptionally pure GCr15 bearing steel, renowned for its homogenous microstructure and absence of non-metallic inclusions. This premium alloy undergoes a rigorously controlled heat treatment protocol, resulting in a formidable surface hardness that defies abrasive contaminants. For procurement specialists focused on long-term asset protection, this material mastery directly translates to a drastic reduction in catastrophic fractures and surface spalling.

• High-Purity GCr15 Steel: Delivers exceptional fatigue resistance, ensuring the bearing maintains structural integrity under relentless continuous operation.

• Optimized Hardness Matrix (58-64 HRC): Provides an impenetrable surface layer against abrasive wear while retaining core toughness to absorb sudden mechanical shocks.

• Controlled Austenitizing Process: Eliminates internal metallurgical stresses, preventing micro-cracking during heavy radial loading.

• Deep-Penetration Quenching: Guarantees uniform hardness across the massive 420 mm outer diameter, ensuring consistent wear rates over years of service.

Structural Design & Self-Aligning

Misalignment is the silent destroyer of rigid rotational systems. This bearing features a brilliantly engineered spherical outer ring raceway that intuitively accommodates shaft deflection and housing distortions. As heavy machinery settles or vibrates, the double-row rollers automatically adjust their position, maintaining optimal load distribution without pinching or edge loading. This self-correcting geometry is a critical safeguard, ensuring that installation inaccuracies do not lead to premature equipment failure.

• Automatic Axis Compensation: Effortlessly neutralizes shaft bending and mounting errors, protecting connected drive components from destructive binding forces.

• Symmetrical Roller Profile: The meticulously ground barrel-shaped rollers ensure maximum contact area with the raceways, dispersing stress evenly across the steel matrix.

• Flangeless Inner Ring: Works in tandem with the CC cage to promote unhindered roller movement, resulting in a whisper-quiet operation that signifies low internal friction.

• Effortless Maintenance Integration: The W33 relubrication design allows maintenance crews to inject grease directly into the load zone, flushing out microscopic debris and renewing the protective fluid film instantly.

Extreme Load & Shock Resistance

Heavy industrial applications demand components that refuse to yield under punishing forces. Boasting a staggering 1413 kN dynamic load rating and a 2500 kN static capacity, this bearing acts as an unbreakable foundation for massive machinery. Whether facing the rhythmic pounding of a vibrating screen or the crushing weight of a metallurgical press, the solid construction absorbs and dissipates kinetic energy. It provides engineers with the ultimate peace of mind, knowing the system will not buckle under sudden overloads.

• Massive Dynamic Capacity (1413 kN): Sustains relentless rotational forces in continuous-duty applications without succumbing to subsurface rolling contact fatigue.

• Unrivaled Static Strength (2500 kN): Withstands extreme stationary loads and sudden impact shocks, preventing plastic deformation of the raceways during equipment startup.

• Vibration Dampening Architecture: The inherent mass and precise internal geometry naturally absorb high-frequency vibrations, protecting sensitive adjacent components like gearboxes and motor shafts.

• Bidirectional Axial Support: The angled roller arrangement effortlessly manages thrust forces from either direction, eliminating the need for supplementary thrust bearings in tight spatial constraints.

Precision Class & Strict QC

Consistency across large-scale deployments is non-negotiable for industrial buyers. Every single unit rolling off the production line adheres strictly to PN/P0 precision standards, with capabilities to upgrade to P6/P5 for ultra-demanding applications. Our uncompromising quality control architecture leaves nothing to chance. From the initial ultrasonic inspection of raw steel billets to the final acoustic emission testing of the assembled unit, we guarantee absolute dimensional and operational uniformity.

• Micron-Level CNC Machining: Ensures exact conformity to the 300 mm bore and 420 mm outer diameter specifications, guaranteeing a flawless interference fit every time.

• Comprehensive Acoustic Testing: Each bearing is subjected to rigorous noise and vibration analysis to detect invisible internal flaws before packaging.

• Rotational Torque Verification: Guarantees that internal friction remains within strict baseline parameters, ensuring energy-efficient operation upon installation.

• Full Lifecycle Traceability: Laser-etched batch codes on every outer ring provide complete transparency, linking the finished product back to its original steel heat and forging records.

Industry Applications & Adaptability

Versatility meets invulnerability. This bearing is engineered to thrive in environments where lesser components disintegrate. Functioning flawlessly across a brutal temperature gradient from -30°C to 200°C, it ignores the blistering heat of steel mills and the freezing conditions of open-pit mines alike. Its robust sealing compatibility and heavy-duty construction make it the definitive choice for the most critical nodes of global industrial infrastructure.

• Mining & Quarrying: Provides the unbreakable core for jaw crushers and vibrating screens, shrugging off severe shocks and abrasive dust environments.

• Metallurgical Processing: Withstands the intense radiant heat and heavy continuous loads found in rolling mills and continuous casting machines.

• Industrial Drive Systems: Delivers the precise alignment and low-friction rotation required for massive gearboxes and power transmission networks.

• Wind Energy Generation: Offers the exceptional reliability and fatigue resistance necessary for main shaft applications in remote, hard-to-service turbine nacelles.

• Pulp & Paper Manufacturing: Resists the high humidity and heavy radial pressures inherent in massive paper drying cylinders.

Supply Chain & OEM/ODM Services

We understand that delayed components mean paralyzed production lines. To eliminate supply chain anxieties, we maintain extensive inventory reserves, ensuring rapid deployment for large-volume requirements. Beyond standard fulfillment, our engineering team collaborates directly with equipment manufacturers to deliver deeply customized solutions. From specialized internal clearances to proprietary packaging, we align our manufacturing capabilities entirely with your operational demands.

• Rapid Global Deployment: Strategically managed inventory ensures 24-hour dispatch capabilities, keeping your massive assembly lines moving without interruption.

• Customizable Clearances (C3/C4): Tailored internal geometries available to accommodate specific thermal expansion rates or unusually tight interference fits.

• Advanced VCI Preservation: Every unit is sealed in premium Volatile Corrosion Inhibitor packaging, guaranteeing pristine, rust-free condition upon arrival, even after extended maritime transit.

• Precision OEM Integration: Dedicated engineering support to modify lubrication hole dimensions, cage materials, or precision classes to match proprietary equipment blueprints.

Why Choose Us

Partnering with a dedicated industrial bearing manufacturer transforms your procurement strategy from a source of friction into a competitive advantage. We do not merely supply metal components; we deliver engineered reliability. Our deep metallurgical expertise, combined with state-of-the-art automated production facilities, ensures that every bearing performs exactly as specified. By choosing our solutions, you are investing in reduced maintenance overhead, extended machinery lifespan, and a supply chain partner fiercely committed to your operational success.

• Decades of Metallurgical Expertise: Deep understanding of steel behavior under extreme stress ensures superior product durability.

• Uncompromising Quality Assurance: State-of-the-art metrology labs verify every critical dimension, ensuring zero-defect deliveries.

• Scalable Production Capacity: Fully equipped to handle massive volume requirements without ever compromising on individual unit precision.

• Responsive Technical Support: Direct access to seasoned mechanical engineers who assist with load calculations, fitment recommendations, and failure analysis.

FAQ

To assist engineering teams and procurement specialists in making informed decisions, we have compiled detailed answers to the most critical technical inquiries regarding this spherical roller bearing.

Q1: How does the W33 lubrication feature specifically enhance maintenance routines?

The W33 design incorporates a precision-machined circumferential groove and three equidistant holes directly into the outer ring. This allows maintenance technicians to inject fresh grease directly into the center of the rolling elements while the machine is operating. It ensures uniform distribution of the lubricant, flushes out degraded grease and micro-contaminants, and drastically reduces the time required for routine maintenance compared to traditional side-lubrication methods.

Q2: What operational scenarios necessitate upgrading to a C3 or C4 internal clearance?

Standard CN clearance is suitable for typical operating temperatures and standard fits. However, if the bearing operates in environments exceeding 100°C, the inner ring will expand more rapidly than the outer ring. A C3 (larger than normal) or C4 (even larger) clearance provides the necessary internal space to accommodate this thermal expansion, preventing the rollers from binding and causing catastrophic failure. These clearances are also mandatory when utilizing heavy interference fits on the shaft.

Q3: Can this double-row spherical roller bearing support axial loads?

Yes, it is highly capable of supporting bidirectional axial loads. The internal geometry features raceways that are inclined at a specific angle to the bearing axis. This angular contact allows the barrel-shaped rollers to efficiently transmit thrust forces from the shaft to the housing in either direction, all while simultaneously managing extreme radial loads.

Q4: How does the pressed steel CC cage compare to machined brass cages in high-vibration applications?

The CC design features a lightweight, high-strength pressed steel cage that is window-type and inner-ring guided. Its lower mass reduces inertial forces during rapid acceleration or deceleration, and it offers excellent flexibility to withstand sudden shock loads. While brass cages are excellent for extreme friction environments, the optimized CC steel cage provides superior fatigue resistance and lower heat generation in standard heavy-duty vibration scenarios, such as vibrating screens and crushers.

Q5: What is the maximum allowable misalignment this bearing can accommodate?

Thanks to the flawlessly contoured spherical profile of the outer ring raceway, this bearing can typically accommodate dynamic misalignment and shaft deflections of up to 1.5 to 2 degrees from the central axis. This self-aligning capability operates completely seamlessly without increasing internal friction or reducing the bearing's calculated fatigue life, making it indispensable for long shafts subject to severe bending under heavy loads.