Product Specifications
| Parameter |
Details |
| Model NO. |
21311CCK |
| 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 |
| Specification |
55*120*29 mm |
| HS Code |
8482300000 |
Application Industries
| Industry |
Typical Equipment |
| Industrial Machinery |
Machine Tools, Printing Equipment, Gearboxes |
| Agricultural Machinery |
Harvesters, Tractors |
| Construction |
Excavators, Heavy Load Machinery |
| Manufacturing |
CNC Machines, Conveyors, Pumps |
Reduce Downtime with Reliable 21311-21316CCK W33 Self-Aligning Roller Bearings
Equipment failure due to bearing issues costs manufacturers thousands in lost production each year. Many face challenges with inconsistent quality from unknown suppliers, long lead times for custom orders, and difficulty finding precision bearings that meet industrial machinery requirements. When bearings fail prematurely, the ripple effect includes missed deadlines, increased maintenance costs, and frustrated customers.
Self-Aligning Roller Bearings Engineered for Industrial Performance
Our Self-Aligning Roller Bearings 21311-21316CCK W33 are designed to address these pain points. With P0-P4 precision ratings and C0-C4 clearance options, they deliver stable performance in heavy-load industrial applications. As an integrated manufacturer with full R&D and QC capabilities, we ensure each bearing meets strict quality standards, supported by ISO9001 and ISO14001 certifications. Whether for machine tools, printing presses, or agricultural equipment, these bearings provide the reliability your operations demand.
Optimal Performance in Demanding Industrial Environments
Self-aligning roller bearings excel in applications where shaft misalignment is common, such as in conveyor systems and heavy machinery. The double-row design and spherical outer ring allow for angular misalignment up to 2-3 degrees, reducing stress on the shaft and extending equipment life. These bearings are built to handle radial loads efficiently, making them ideal for industrial machinery that operates under constant heavy loads and variable speeds.
Key Technical Features That Matter
Precision rating is critical for industrial machinery performance. Our P0-P4 precision bearings ensure minimal vibration and noise, which is essential for high-speed applications like CNC machines. The clearance options (C0-C3-C4) allow customization based on operating conditions—C3 and C4 clearances are recommended for high-temperature environments where thermal expansion occurs. Constructed from high-quality bearing steel, these bearings offer excellent wear resistance, ensuring long service life even in dusty or humid industrial settings. The unseparated design simplifies installation and maintenance, reducing downtime during replacements.
Why Authentic Bearings Lower Total Costs
Choosing genuine Self-Aligning Roller Bearings over counterfeit alternatives reduces long-term costs significantly. Counterfeit bearings often fail early due to poor material quality and imprecise manufacturing, leading to unexpected equipment shutdowns. A single unplanned downtime event can cost more than the price of several genuine bearings. Our bearings come with a 12-month global warranty, ensuring that any manufacturing defects are promptly addressed with replacement or refund. By investing in authentic, precision-engineered bearings, you avoid the hidden costs of frequent replacements and production losses.
Our Commitment to Your Success
With 18 years of experience serving global buyers, we have built a reputation for reliability. Our production capacity of 1,000,000 units annually ensures stable supply, even for large orders. We offer flexible ordering with 1pc MOQ for standard items, 3–5 days sample lead time, and 5–15 days bulk delivery, making us a trusted partner for both emergency repairs and regular stock replenishment. Our technical team provides free guidance to help you select the right bearing for your application, ensuring optimal performance and longevity. All products are traceable through our quality control system, giving you peace of mind with every purchase.
Packaging & Shipping
- Carton and pallet packaging for secure transportation
- 3–5 days sample lead time for testing and validation
- 5–15 days bulk delivery to meet your production schedule
- Multiple shipping options including T/T, credit card, and Alibaba trade保障
- 1pc MOQ available for emergency replacement needs
Get Your Bearings When You Need Them
Don’t let bearing issues slow down your operations. Send us your bearing model, required precision grade, and quantity, and our team will provide a quote within 24 hours. With free samples available (buyer covers freight), you can test the performance before committing to a bulk order. Ensure your machinery runs smoothly with bearings you can trust—contact us today to get started.
Frequently Asked Questions
Q: Are these bearings genuine and traceable?
A: Yes, we are an integrated manufacturer with strict quality control. Each bearing is produced in our ISO-certified facility and comes with full traceability documentation.
Q: How do I confirm the right bearing model for my equipment?
A: Provide your equipment model, operating load, and speed, and our technical team will assist with free选型确认 to ensure compatibility.
Q: What is the warranty policy?
A: We offer a 12-month global warranty. Manufacturing defects are covered by free replacement or refund.
Q: What is the minimum order quantity?
A: 1pc MOQ for standard items, supporting both small repairs and large-scale production needs.
Q: How long does shipping take?
A: Samples ship in 3–5 days, bulk orders in 5–15 days. We work with global logistics providers for timely delivery.
Q: Can I request custom specifications?
A: Yes, we offer full OEM/ODM customization. Contact us with your specific requirements for a tailored solution.
Ready to order or need a quote?
Send your bearing designation, application details, and quantity — we'll respond within 24 hours.
