Roller Bearings
Tapered Roller 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
30200 Series – Standard Tapered Roller Bearing
Most Popular Customizable
30200 series is the most widely used tapered roller bearing, designed to handle combined radial and axial loads with a standard contact angle for general industrial applications.
- Inner Diameter (d): 15–130 mm
- Outer Diameter (D): 35–230 mm
- Width (B): 11–40 mm
- Basic Dynamic Load Rating (Cr): 16,800–260,000 N
- Basic Static Load Rating (C₀r): 11,800–228,000 N
- Limiting Speed (Grease): 3,200–13,000 rpm
30300 Series – Medium Tapered Roller Bearing
Higher Load Customizable
30300 series has larger rollers and wider races than the 30200 series, providing higher combined load capacity for more demanding industrial and automotive applications.
- Inner Diameter (d): 15–130 mm
- Outer Diameter (D): 42–280 mm
- Width (B): 13–58 mm
- Basic Dynamic Load Rating (Cr): 23,400–375,000 N
- Basic Static Load Rating (C₀r): 17,600–345,000 N
- Limiting Speed (Grease): 2,600–10,000 rpm
32000 Series – Wide Tapered Roller Bearing
Extra Wide Customizable
32000 series features an increased width for the same bore and OD, resulting in larger rollers and higher load capacity in a compact radial envelope.
- Inner Diameter (d): 15–130 mm
- Outer Diameter (D): 35–230 mm
- Width (B): 14–64 mm
- Basic Dynamic Load Rating (Cr): 20,500–310,000 N
- Basic Static Load Rating (C₀r): 15,500–280,000 N
- Limiting Speed (Grease): 2,800–11,000 rpm
Double Row Tapered Roller Bearing
Double Row Customizable
Double row tapered roller bearings accommodate combined loads from all directions and have high radial load and tilting moment capacity, ideal for rigid bearing arrangements.
- Inner Diameter (d): 20–130 mm
- Outer Diameter (D): 52–280 mm
- Width (B): 22–92 mm
- Basic Dynamic Load Rating (Cr): 32,000–520,000 N
- Basic Static Load Rating (C₀r): 30,000–490,000 N
- Limiting Speed (Grease): 1,800–7,500 rpm
Four-Row Tapered Roller Bearing
Maximum Capacity Customizable
Four-row tapered roller bearings are designed for the heaviest combined loads and tilting moments, typically used in rolling mills, heavy industrial machinery, and crane applications.
- Inner Diameter (d): 50–400 mm
- Outer Diameter (D): 130–600 mm
- Width (B): 80–370 mm
- Basic Dynamic Load Rating (Cr): 280,000–3,800,000 N
- Basic Static Load Rating (C₀r): 400,000–5,200,000 N
- Limiting Speed (Grease): 500–3,000 rpm
Inch-Series Tapered Roller Bearing
Inch Dimensions Customizable
Inch-series tapered roller bearings follow ANSI/ABMA standards with imperial dimensions, widely used in North American automotive, agricultural, and construction equipment.
- Bore (d): 0.500"–6.000" (12.7–152.4 mm)
- OD (D): 1.3125"–8.4375" (33.3–214.3 mm)
- Width (T): 0.4375"–2.2500" (11.1–57.2 mm)
- Basic Dynamic Load Rating (Cr): 15,000–320,000 N
- Basic Static Load Rating (C₀r): 11,000–290,000 N
Applications
Automotive Wheel Hubs & Axles
Primary bearing for vehicle wheel assemblies, handling combined radial, axial, and moment loads during driving.
Gearboxes & Differential Units
Precision support for pinion shafts, gear shafts, and differential assemblies in power transmission.
Mining & Construction Equipment
Heavy-duty capacity for crushers, excavators, and earth-moving machinery operating under extreme loads.
Rolling Mills & Metal Processing
Maximum load capacity for work rolls and backup rolls in hot and cold rolling mill applications.
About BOM Bearing
BOM Bearing is a professional manufacturer and supplier of high-quality tapered roller bearings, providing robust combined load solutions for industrial and automotive applications worldwide.
- Quality Assurance: ISO 9001 certified manufacturing with strict quality control at every production stage
- Full Range: Metric 30200/30300/32000 series plus inch series, single/double/four-row configurations
- Custom Solutions: Contact angle, precision grades, clearance adjustments, cage materials, and special coatings
- Technical Support: Professional engineering team for product selection, application analysis, and troubleshooting
- Fast Delivery: Efficient production lines and global logistics network ensuring timely delivery
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Frequently Asked Questions (FAQ)
What loads can tapered roller bearings handle?
They handle combined radial and axial loads simultaneously. The contact angle determines the ratio of axial to radial load capacity. Steeper angles provide higher axial capacity.
Single row vs double row vs four row?
Single row for general combined loads (must be paired for bidirectional axial loads). Double row for rigid arrangements with high moment resistance. Four row for extremely heavy loads in rolling mills and heavy machinery.
Should I choose metric or inch series?
Metric (30xxx/32xxx) for international/European applications. Inch series for North American automotive, agricultural, and construction equipment. Both provide equivalent performance.
How do I set the correct preload/clearance?
Tapered roller bearings are typically adjusted during installation. Slight preload for precision applications, small clearance for general use. Proper setting is critical for bearing life and performance.
Can BOM customize tapered roller bearings?
Yes, including special dimensions, contact angles, precision grades, cage materials, surface treatments, and matched pair configurations.
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