Ball Bearings
Double Row Deep Groove Ball Bearings
The NU/NJ/NUP/N/NF/NP cylindrical roller bearings are engineered for high radial load capacity, low friction, and long-term operational reliability. With a compact structure and high rigidity, this bearing series maintains excellent running accuracy under high-speed or heavy-load conditions. By optimizing roller and raceway geometry and applying high-precision manufacturing processes, these bearings deliver higher efficiency, extended service life, and reduced maintenance requirements in industrial transmission systems.
Key Features
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High Radial Load Capacity
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Low Friction and High Operating Efficiency
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High Rigidity and Precision Performance
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Multiple Structural Types (NU / NJ / NUP / N / NF / NP)
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Long Service Life and Reduced Maintenance
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Wide Size Range and Customization Support
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Description
Reviews
4200 Series – Standard Double Row Deep Groove Ball Bearing
Most Popular
Customizable
The 4200 series features two rows of balls running in deep raceway grooves, providing significantly higher radial load capacity than single-row designs while accommodating axial loads in both directions.
- d: 10–100mm
- D: 30–180mm
- B: 14–46mm
- Cr: 9,360–132,000N
- C₀r: 5,200–108,000N
- Limiting Speed (Grease): 4,000–16,000rpm
4300 Series – Heavy Double Row Deep Groove Ball Bearing
Heavy Duty
Customizable
The 4300 series provides maximum radial load capacity among double-row deep groove designs, with larger ball complements and heavier races for demanding industrial applications.
- d: 10–100mm
- D: 35–215mm
- B: 17–56mm
- Cr: 14,800–196,000N
- C₀r: 8,800–173,000N
- Limiting Speed (Grease): 3,500–13,000rpm
Sealed Double Row Deep Groove Ball Bearing (2RS/ZZ)
Pre-lubricated
Maintenance-Free
Sealed (2RS) and shielded (ZZ) double-row variants provide built-in contamination protection with factory pre-lubrication, ideal for harsh environments requiring maintenance-free operation.
- Shield Type (ZZ): Metal shields, low friction, moderate contamination protection
- Seal Type (2RS): Rubber contact seals, superior dust/moisture protection
- Available Series: 4200, 4300
- Operating Temp: −20 to +120°C
- Lubrication: Factory pre-filled high-performance grease
High-Precision Double Row Deep Groove Ball Bearing
High Precision
Customizable
Precision-ground double-row deep groove ball bearings manufactured to tighter tolerances for applications requiring superior running accuracy and reduced vibration.
- Precision Grades: P6, P5, P4
- Radial Runout (P5): ≤5μm
- Width Variation (P5): ≤5μm
- Available Clearance: C2, CN, C3
- Cage Options: Pressed steel, brass, polyamide
Extended-Width Double Row Deep Groove Ball Bearing
Extra Capacity
Customizable
Extended-width variants feature wider inner and outer rings for enhanced radial and axial load capacity, providing superior rigidity in space-constrained applications.
- d: 15–80mm
- D: 35–170mm
- B: 18–52mm
- Cr: 12,500–155,000N
- C₀r: 7,200–135,000N
- Limiting Speed (Grease): 3,200–14,000rpm
Applications
Electric Motors & Generators
Superior radial load support for high-output motors requiring compact bearing arrangements
Gearboxes & Reducers
Enhanced load capacity for intermediate and output shafts under heavy combined loading
Pumps & Compressors
Robust bearing solutions for fluid equipment operating under continuous high radial loads
Conveyor Systems & Material Handling
Durable support for heavy-duty rollers and idlers in industrial transport systems
About Us
BOM Bearing is a professional manufacturer and supplier of high-quality double row deep groove ball bearings, delivering enhanced load capacity solutions for demanding industrial applications worldwide.
- Quality Assurance: ISO 9001
- Full Series Coverage: Complete 4200 and 4300 series range
- Custom Solutions: Precision grades, clearance classes, cage materials, sealing options
- Technical Support: Expert guidance and consultation
- Fast Delivery: Efficient logistics and supply chain
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FAQ
What is the advantage of double row vs single row deep groove ball bearings?
Double row bearings provide approximately 1.6x the radial load capacity of equivalent single row types, while being more compact than using two single row bearings side by side.
When should I choose double row deep groove ball bearings?
When the radial load exceeds single-row capacity, when space is limited and two bearings cannot be used, or when additional rigidity and stiffness are required.
Can double row deep groove bearings handle axial loads?
Yes, they accommodate axial loads in both directions, similar to single-row types but with higher capacity due to the increased number of rolling elements.
What clearance should I specify?
CN (Normal) for standard applications. C3 for high-temperature or interference-fit situations. C2 for precision applications with minimal play requirements.
Can BOM customize double row deep groove ball bearings?
Yes, including special dimensions, precision grades (P6–P4), clearance classes, cage materials, sealing options, and surface treatments.
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