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Ensure smooth, long-lasting performance in your machinery with high-quality NTN Tapered Roller Bearing designed to handle radial and axial loads with precision. Crafted from durable bearing steel and available in precision ratings P0-P2, these bearings minimize noise and maximize speed, reducing downtime and maintenance hassles.
15+ Certified Engineers On-Call
Free application analysis · Failure diagnosis · Custom modification guidance. Response within 24 hours.
| Parameter | Details |
|---|---|
| Model Number | 6300, 6301, 6302, 6304, 6305 |
| Bearing Type | NTN/NSK/Koyo/NACHI/Timken Roller Bearing |
| Outer Dimension | Medium and Large(120-190mm) |
| Material | Bearing Steel |
| Spherical | Non-Aligning Bearings |
| Load Direction | Radial Bearing |
| Separated | Unseparated |
| Lubrication | Grease or Oil |
| Precision Rating | P0, P6, P5, P4, P2 |
| Vibration | Z1V1, Z2V2, Z3V3 |
| Feature | Long Life, High Speed, Low Noise |
| Stock | Rich Stocks |
| Trademark | NTN/NSK/KOYO/NACHI/TIMKEN |
| Origin | China |
| HS Code | 8482102000 |
| Industry | Typical Applications |
|---|---|
| Automotive | Transmission systems, wheel hubs |
| Industrial Machinery | Conveyors, pumps, gearboxes |
| Construction | Excavators, cranes, loaders |
| Steel Metallurgy | Rolling mills, processing equipment |
| Automation | Robotic arms, precision equipment |
Finding the right tapered roller bearing often means sifting through dozens of models, worrying about compatibility with existing equipment, and risking downtime from premature failures. Many buyers face the frustration of mismatched dimensions or poor quality bearings that wear out within months—costing more in repairs than the initial purchase.
Our NTN 30305, 30306, and 30307 tapered roller bearings address these challenges head-on. As a专业轴承供应商 with ISO 9001-certified processes, we ensure each bearing meets strict dimensional and material standards. Whether you need a direct replacement for industrial machinery or a custom solution for automotive applications, our extensive inventory and multi-brand sourcing capabilities mean you get the right part when you need it.
Designed as radial bearings with non-aligning properties, this series excels in medium to large equipment (120-190mm outer dimensions) where precise load distribution is critical. The unseparated design ensures stability under high-speed operation, while the bearing steel construction provides the durability needed for heavy-duty use in construction, steel, and mining industries. Proper lubrication—either grease or oil—further extends service life, making these bearings ideal for continuous-operation machinery.
The precision rating options (P0 to P2) allow customization based on application needs: P0 for general industrial use, P5/P4 for high-speed equipment, and P2 for precision machinery. Vibration levels (Z1V1 to Z3V3) ensure smooth operation, reducing noise in automation and automotive systems. The combination of long life and low noise characteristics stems from strict quality control—each bearing undergoes dimensional checks and surface hardness testing to meet international standards.
Investing in quality tapered roller bearings reduces hidden expenses associated with frequent replacements and unplanned downtime. A bearing that meets precision standards (like our P5-rated options) minimizes vibration-induced wear on adjacent components, extending overall equipment life. In contrast, low-quality bearings with subpar material hardness often fail prematurely, leading to costly repairs and production losses. By focusing on total cost of ownership rather than upfront price, our bearings deliver better value over time.
Our production and inspection processes adhere to ISO 9001 standards, from raw material testing to final dimension verification. Each bearing undergoes hardness and surface treatment checks to ensure consistency. We offer a warranty against manufacturing defects, with clear terms outlined in each order. With rich stocks and support for OEM/ODM customization, we can fulfill both standard and specialized requirements, including hard-to-find models from NTN, NSK, Koyo, NACHI, and Timken.
Whether you need NTN 30305, 30306, 30307, or other roller bearing models, we can provide competitive pricing and quick delivery. Share your required model, quantity, and delivery location, and our team will respond with a detailed quote—no obligation, just reliable service from a trusted supplier.
Q: Do you supply bearings from other brands besides NTN?
A: Yes, we offer a full range of international brands including NSK, Koyo, NACHI, Timken, and domestic Chinese brands. We can source any specified brand or model based on your requirements.
Q: How can I confirm if this bearing fits my equipment?
A: Provide your equipment model or the bearing dimensions (bore diameter, outer diameter, width), and our technical team will verify compatibility with the 30305-30307 series or recommend alternatives.
Q: What is your warranty policy?
A: We provide a warranty against manufacturing defects. Specific terms, including duration, are detailed in each sales contract, with options for returns or replacements in case of quality issues.
Q: What is the minimum order quantity?
A: We support low minimum order quantities, allowing small batch purchases for maintenance or testing, as well as large volume orders for production.
Q: How long does shipping take?
A: In-stock items ship within 1-3 business days. Sea freight typically takes 20-35 days, while air freight arrives in 3-7 days depending on destination.
Q: Can you produce custom bearings?
A: Yes, we offer OEM/ODM services. Provide technical drawings or specifications, and we can manufacture bearings tailored to your unique requirements.
Ready to order or need a quote?
Send the bearing model, dimensions (d x D x B), and quantity — we’ll get back to you with pricing and lead time.
contact@bearing-supplier.com | +86-123-45678910
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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
24h
Quote Response
78% of large enterprises prefer suppliers offering integrated technical support and lifecycle services.
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.
-- Get In Touch
Our certified engineers will review your application requirements and provide a detailed quote within 24 hours.
Address
No. 377 Bansongyuan Road, Huangpu District, Shanghai, China
Free Sample Program
Orders over $50K qualify for free product samples
Test against your KPIs before full production commitment. Ask our engineers for details.
Regarding: NTN 30305 30306 30307 Tapered Roller Bearing High Quality
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