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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. Here is a detailed breakdown of its core specifications and applications:
I. 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.
II. 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 .
III. 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 .
IV. 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 .
V. 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 guarantee
3. Wafangdian Bearing ...
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 guarantee
3. Wafangdian Bearing ...