Product Specifications
| Parameter |
Details |
| Precision Rating |
P0, P6, P5, P4, P2 |
| Clearance |
C0, C3, C4 |
| Service |
OEM, ODM |
| Rolling Body |
Roller Bearings |
| The Number of Rows |
Double |
| Material |
Bearing Steel |
| Spherical |
Aligning Bearings |
| Load Direction |
Radial Bearing |
| Separated |
Unseparated |
| Outer Dimension |
50-2500 mm |
| Transport Package |
Carton Pallet |
| Specification |
55*120*29 mm |
| Trademark |
SKF, NTN, NSK, NMB, Koyo, NACHI, Timken |
| Origin |
China |
| HS Code |
8482300000 |
| Production Capacity |
1000000 units |
Application Industries
| Industry |
Typical Equipment |
| Industrial Machinery |
Machine Tools, Printing Equipment, Reducers |
| Automotive |
Wheel Hubs, Transmission Systems |
| Agriculture |
Harvesters, Tractors |
| New Energy |
Wind Turbines, Photovoltaic Equipment |
| Construction |
Excavators, Heavy Load Machinery |
Minimize Downtime with Reliable 21311-21316CC W33 Self-Aligning Roller Bearings
Industrial machinery operators know the frustration of unexpected downtime caused by bearing failures. Misalignment issues, heavy radial loads, and inconsistent quality from low-cost suppliers often lead to frequent replacements and production losses. Sourcing precision bearings that balance performance, availability, and cost remains a constant challenge for maintenance teams and procurement managers.
Self-Aligning Roller Bearings Engineered for Industrial Durability
Our Self-Aligning Roller Bearings 21311-21316CC W33 series address these pain points with P0-P4 precision ratings and robust double-row roller design. As an integrated manufacturer with ISO9001 and ISO14001 certifications, we ensure each bearing meets strict quality standards for machine tools, reducers, and heavy-duty industrial equipment. With 1pc MOQ for standard items and 3-5 days sample lead time, we support both emergency repairs and scheduled maintenance needs.
Optimal Performance in Demanding Industrial Conditions
These self-aligning roller bearings excel in applications with misalignment, heavy radial loads, and moderate axial loads—common challenges in printing machinery, conveyor systems, and agricultural equipment. The W33 lubrication groove and recess design ensures efficient grease distribution, while the double-row configuration provides enhanced load capacity compared to single-row alternatives. Whether operating in dusty factory environments or variable temperature conditions, these bearings maintain consistent performance to keep your equipment running.
Key Technical Features That Maximize Service Life
Precision rating directly impacts operational stability: P4 grade bearings deliver tighter tolerances for high-speed machine tools, while P0 grade offers cost-effective reliability for general industrial use. Clearance options (C0, C3, C4) allow customization for thermal expansion needs—C3 clearance is ideal for applications with temperature fluctuations, preventing premature failure from internal stress. The bearing steel construction provides excellent fatigue resistance, ensuring longer service life under cyclic loading conditions typical in manufacturing equipment.
Long-Term Value of Authentic Precision Bearings
Choosing genuine high-precision bearings reduces total cost of ownership by minimizing unplanned downtime and replacement frequency. Counterfeit bearings often fail prematurely, leading to secondary equipment damage and production losses that far exceed initial cost savings. Our bearings undergo rigorous quality control through full R&D and QC lab testing, ensuring compliance with international standards. With a 12-month global warranty and defect replacement policy, we stand behind the performance of every bearing we supply.
Why Industrial Buyers Choose Saifan Bearings
With 18 years of manufacturing experience since 2005, we serve global buyers across Europe, America, Southeast Asia, and the Middle East. Our production capacity of 1,000,000 units annually ensures stable supply, while OEM/ODM customization capability meets specialized equipment requirements. We provide free technical guidance to help select the right bearing for your application, and our flexible payment options (T/T, credit card, Alibaba trade) streamline procurement. Each bearing is shipped in secure carton pallet packaging to prevent damage during transit.
Packaging & Shipping
- Standard carton packaging with pallet reinforcement for bulk orders
- 3-5 days lead time for samples, 5-15 days for bulk delivery
- Global shipping via DHL, FedEx, UPS, air freight, or sea freight
- Real-time tracking number provided upon shipment
- 1pc minimum order quantity for standard specifications
Get Your Industrial Bearings Shipped Fast
Don’t let bearing issues disrupt your production schedule. Whether you need a single replacement bearing or bulk order for scheduled maintenance, we ensure prompt delivery and reliable performance. Early ordering helps avoid emergency downtime costs—contact us today with your specifications.
Frequently Asked Questions
Q: Are these bearings authentic and traceable?
A: Yes, we supply authentic bearings with full traceability. As an ISO9001 certified manufacturer, each product undergoes strict quality control and can be traced through our production records.
Q: How do I confirm the correct bearing size for my equipment?
A: Provide your equipment model or existing bearing designation, and our technical team will verify compatibility. We also offer free sample evaluation for critical applications.
Q: What is your warranty policy for these bearings?
A: We offer a 12-month global warranty covering manufacturing defects. Defective products will be replaced or refunded according to customer preference.
Q: What is the minimum order quantity for 21311CC W33 bearings?
A: The minimum order quantity is 1 piece for standard specifications, supporting emergency repair needs.
Q: How long does it take to ship to European countries?
A: Standard bulk orders ship within 5-15 days, with DHL/FedEx delivery to Europe typically taking 3-5 business days after shipment.
Q: Can you provide custom bearing solutions for special equipment?
A: Yes, we offer full OEM/ODM customization services. Provide your technical specifications, and our engineering team will develop tailored solutions.
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