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Experience smooth, reliable performance in your machinery with the NSK Deep Groove Bearing, designed to minimize friction and extend equipment lifespan. This high-quality 6900-6907DDU model maintains consistent operation even under radial loads, thanks to its single-row design and 0° contact angle—key features professionals trust for precision applications.
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| Parameter | Details |
|---|---|
| Model Number | 6404 |
| Bearing Type | Deep Groove Ball Bearing |
| Specification | 20*47*14 mm |
| Material | Bearing Steel |
| Lubrication | Grease or Oil |
| Precision Rating | P0 P6 P5 P4 |
| Vibration | Z1V1 Z2V2 Z3V3 |
| Load Direction | Radial Bearing |
| Contact Angle | 0° |
| Aligning | Non-Aligning Bearing |
| Separated | Unseparated |
| Rows Number | Single |
| Transport Package | Carton Pallet |
| Origin | China |
| HS Code | 8482102000 |
| Industry | Typical Applications |
|---|---|
| Automation Equipment | Conveyor systems, electric motors |
| Mechanical Engineering | Transmission assemblies, pumps |
| Industrial Machinery | Compressors, gearboxes |
Searching for the right deep groove ball bearing often means sifting through countless models with varying dimensions and quality standards. Many buyers face delays when their supplier can’t source specific NSK-compatible sizes, or end up with bearings that fail prematurely due to poor material quality. The 6404 model, with its 20x47x14 mm dimensions, is a critical component in many industrial applications—getting the right specifications matters for both performance and uptime.
This deep groove ball bearing addresses common industry challenges through its robust design and versatile specifications. Manufactured with high-grade bearing steel and available in precision ratings from P0 to P4, it meets the needs of applications requiring tight tolerances. Whether your equipment uses grease or oil lubrication, this bearing accommodates both, reducing the need for multiple part numbers. With a radial load design and single-row configuration, it’s ideal for standard industrial machinery where reliable rotation is essential.
Designed for radial load environments, this bearing operates efficiently in scenarios with minimal axial forces. Its 0° contact angle ensures optimal load distribution, making it suitable for high-speed applications like electric motor shafts and conveyor rollers. The non-aligning design works best in systems with precise shaft alignment, while the unseparated structure simplifies installation and maintenance. Vibration classes Z1V1 to Z3V3 allow selection based on noise and smoothness requirements, from general industrial use to more sensitive equipment.
The bearing steel construction provides the hardness needed to resist wear under continuous operation, a critical factor in extending service life compared to lower-grade materials. Precision ratings directly affect performance—P5 and P4 grades offer tighter dimensional control for applications where runout must be minimized, such as machine tool spindles. The choice between Z1V1 to Z3V3 vibration levels lets you match the bearing to your equipment’s noise specifications, preventing premature failure from excessive vibration. Proper lubrication (grease or oil) further enhances durability by reducing friction between rolling elements and raceways.
Selecting a bearing with the correct precision rating and material quality directly impacts total cost of ownership. A P0 grade may suffice for general use, while P5/P4 is worth the investment for high-precision machinery to avoid costly downtime. Using bearing steel ensures resistance to deformation under load, reducing the risk of sudden failures that damage adjacent components. The ability to choose lubrication type allows adaptation to operating conditions—oil for high-temperature environments or grease for extended maintenance intervals. Overlooking these factors often leads to frequent replacements and unplanned production stops, far exceeding the initial cost of a properly specified bearing.
Our production and inspection processes follow ISO 9001 standards, ensuring consistent quality from raw material testing to final dimensional checks. Each bearing undergoes hardness testing and surface treatment inspection to meet industry specifications. We provide a warranty against manufacturing defects, with clear terms for replacement or return. Our supply chain includes both自有 brand and international brand options, allowing you to source the exact model or compatible alternatives. With substantial inventory, we support quick turnaround for urgent orders, minimizing production delays.
Whether you need the 6404 model or other sizes in the 6900-6907DDU series, we can provide pricing and availability quickly. Share your required specifications, quantity, and delivery location, and our team will prepare a tailored quote. We handle both standard orders and custom requirements, ensuring you get the right bearing for your application without unnecessary delays.
Q: Do you supply bearings from other brands besides the ones listed?
A: Yes, we support procurement of bearings from all major international and domestic brands. Specify your required brand and model, and we can source it for you.
Q: How can I confirm if the 6404 bearing fits my equipment?
A: Provide your equipment’s shaft diameter, housing bore size, and required width, and our technical team will verify compatibility with the 20x47x14 mm dimensions.
Q: What is your warranty policy for this bearing?
A: We offer a warranty against manufacturing defects. Specific terms, including duration, are outlined in each order’s contract.
Q: What is the minimum order quantity for the 6404 bearing?
A: We accept low minimum order quantities, including small-batch purchases for testing or maintenance needs.
Q: How long does shipping take for in-stock bearings?
A: In-stock bearings ship within 1-3 business days. Delivery time depends on your location and chosen shipping method.
Q: Can you produce custom bearings to specific dimensions?
A: Yes, we support OEM/ODM customization. Provide your technical drawings or specifications, and we can manufacture bearings to your requirements.
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Official partner since 1998 with direct access to SKF technical resources, genuine products, and engineering expertise.
In-house team provides application design, failure analysis, and predictive maintenance -- reducing bearing failures by 35%.
Every product undergoes rigorous pre-shipment inspection with full documentation for traceability and compliance.
Dedicated account managers and reliable delivery networks ensure on-time supply for enterprise clients worldwide.
Performance Metrics
35%
Failures Prevented
70%
Downtime Reduction
25+
Years Experience
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Custom bearing selection and system design based on your specific load conditions, speeds, temperatures, and environmental factors.
Root-cause investigation of bearing failures using metallurgical testing, vibration analysis, and operating data review.
IIoT-enabled monitoring with smart sensor bearings for real-time vibration, temperature, and RPM tracking.
Modified bearings with special coatings, seals, tolerances, or materials. Lead time 8-12 weeks from official channels.
Certified engineers available for on-site installation support, alignment checks, and commissioning assistance worldwide.
Long-term service agreements including regular maintenance checks, replacement scheduling, and performance reporting.
Free samples available for orders over $50K
Validated against your KPIs before full production commitment.
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Orders over $50K qualify for free product samples
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