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33018 Double Row Tapered Roller Bearing 90x140x39 High Load Bearings For Heavy Industry Transportation
Double Row Tapered Roller Bearing 33018 High Load For Heavy Industry Transportation. Tapered roller bearing 33018 is a double-row separable bearing designed for high radial and bidirectional axial combined loads, widely used in heavy industrial equipment and precision machinery.
Technical Parameters
Basic Dimensions
Bore: 90 mm
Outer diameter: 140 mm
Total width: 39 mm
Contact angle: 10°10'
Weight: 2.2-2.48 kg
Load Capacity
Dynamic load rating: 216-369 kN (varies with design optimizations)
Static load rating: 360-365 kN
Limiting speed: 4,500-4,800 r/min (dependent on lubrication and material)
Reference speed: 2,600-2,800 r/min
Structural Advantages
Double-row tapered rollers: Achieve high rigidity through line contact between rollers and raceways
Separable design: Allows independent installation of inner and outer rings, facilitating clearance adjustment and maintenance
Optimized contact angle (10°10'): Balances radial and axial load capabilities
Application Scenarios
Heavy Industrial Machinery
Mining crushers and ball mills: Handles high radial forces from grinding media
Rolling mills and large reducers: Stabilizes cyclic impact loads in industrial processing
Transportation Equipment
Heavy-duty truck axles and railway bogies: Supports dynamic loads during high-speed operation
Construction machinery: Used in excavator slewing rings and loader gearboxes for bidirectional positioning
Precision Machinery
Machine tool spindles and printing rollers: Ensures machining accuracy with low friction and high rigidity
Wind turbine gearboxes: Maintains stability in high-temperature, dusty environments
New Energy and Environmental Equipment
Biomass compressors: Withstands harsh conditions and enables long-term operation
Separable design: Reduces downtime by simplifying maintenance
Installation & Maintenance
Installation Methods
Interference fit: Heat inner ring to 80-100°C for thermal mounting. Use precision spacers to avoid raceway damage during press-fitting
Preload adjustment: Pair bearings with spacers or nuts to control axial clearance (0.03-0.08 mm for double-row bearings)
Lubrication Recommendations
Grease lubrication: Fill 1/3 of internal space with lithium-based grease (NLGI 2), suitable for -30°C to 150°C. Re-lubricate every 200 hours in high-temperature environments
Oil lubrication: Flow rate: 30-40 mL/min for high-speed applications to ensure cooling
Maintenance Checks
Monitor vibration and temperature: Shut down if temperature exceeds ambient by 40°C or vibration exceeds ISO 10816 standards
Use hydraulic pullers or induction heaters for disassembly to prevent damage
Standards & Certifications
Compliant with DIN ISO 355 and DIN 720 international standards
Aligned with GB/T 297-2015 (China) for dimensional tolerances and interchangeability
Optional versions meet API 610 for petrochemical applications
Key Considerations
Material selection: High-carbon chromium steel (GCr15) or ceramic hybrid materials for extreme conditions
Customization: Available options include special coatings and clearance classes to optimize performance for specific loads and speeds
Conclusion: The 33018 tapered roller bearing excels in heavy-duty applications requiring robust radial and axial support. Its separable design, high rigidity, and compliance with global standards make it a versatile choice for industries ranging from mining to renewable energy. Always match lubrication and installation practices to operational requirements for optimal longevity.
Introduction:1.Covering an area of 80 mu (about 53,333 square meters), our factory has a 60-person team including 4 professional engineers, ensuring stable production and technical support.
2. Focusing on bearing production for 25 years, quality is our only guarantee3. Wafangdian Bearing Factory was... Introduction:1.Covering an area of 80 mu (about 53,333 square meters), our factory has a 60-person team including 4 professional engineers, ensuring stable production and technical support.
2. Focusing on bearing production for 25 years, quality is our only guarantee3. Wafangdian Bearing Factory was...
