Mining & Metallurgy
Crushers, mills, conveyors, and smelting equipment under heavy radial/axial loads.
<p>Ensure seamless industrial machinery performance with the <strong>Double Row Angular Contact Ball Bearing 3309a-2Z/C3 MT33</strong>, engineered to deliver exceptional radial and axial load support for high-precision applications. As an official SKF distributor, we guarantee 100% genuine bearings with full traceability documentation, eliminating compliance hurdles and quality risks in your supply chain.</p><ul><li>Double row angular contact design with 2Z metal shields provides superior running accuracy and contamination resistance, ideal for continuous operation in harsh industrial environments</li><li>C3 clearance rating and MT33 cage material optimize thermal stability, reducing downtime from premature bearing failure</li><li>Backed by SKF-certified technical support and our centralized warehouse, ensuring reliable bulk supply that aligns with your production scheduling needs</li></ul>
Compatible with: Housings, adaptor sleeves, locking devices, SKF LGMT 2/3 grease, induction heaters, and SKF TMFT 36 fitting tools.
Formal quotation with SKF traceability cert within 24 hours · Sample orders available
24h Response
Quotation & Cert
60+ Countries
DDP/DAP/CIF
ISO 9001
Quality Certified
| Parameter | Value | Unit / Note |
|---|---|---|
| Bearing Series | -- | Angular Contact Bearing |
| Bore Diameter (d) | -- | mm |
| Outer Diameter (D) | -- | mm |
| Width / Height (B) | -- | mm |
| Dynamic Load Rating (C) | -- | kN |
| Static Load Rating (Câ‚€) | -- | kN |
| Fatigue Limit Load (Pu) | -- | kN |
| Reference Speed | -- | r/min |
| Limiting Speed | -- | r/min |
| Mass | -- | kg |
| Clearance Class | C3 | ISO 281 |
| Cage Material | -- | -- |
| Sealing / Shield | -- | -- |
| Lubrication | Grease / Oil bath | -- |
| Operating Temp. Range | −30 to +120 °C | -- |
| Vibration Level | SKF E1 / Standard | -- |
| Misalignment Tolerance | -- | ° |
| Fit Recommendation (shaft) | -- | ISO |
| Fit Recommendation (housing) | -- | ISO |
| Replacement / Cross Ref. | -- | -- |
Engineered for demanding industrial environments, this SKF bearing series delivers reliable performance across a wide range of heavy-duty and precision applications.
Crushers, mills, conveyors, and smelting equipment under heavy radial/axial loads.
Wind turbines, generators, gearboxes, and turbine main shafts.
Cranes, presses, rolling mills, and large industrial gearboxes.
Ship propulsion systems, deck machinery, and offshore platforms.
Kiln drives, ball mills, bucket elevators, and vibrating screens.
Paper machine rolls, dryer sections, and calender rolls.
Need Application Advice?
SKF-Certified Engineer
Selection · Failure analysis · Technical support
Every SKF bearing supplied by Dunyu Bearings adheres to SKF's global engineering standards -- from material science and heat treatment to precision tolerancing and noise classification.
Optimized internal geometry reduces friction and heat generation, extending service life by up to 50% compared to conventional designs. Ideal for high-speed and high-temperature applications.
Manufactured to ISO P0-P6 tolerance classes. Dimensional accuracy and running accuracy are 100% verified before shipment, with full batch traceability records.
Comprehensive sealing options: open, shielded (Z/2Z), rubber sealed (RS/2RS), and labyrinth variants. SKF V-rings and radial shaft seals available as integrated solutions.
LGMT 2/3 general purpose grease for most applications. LGEP 2 for heavy loads, LGHP 2 for high temperatures. SKF automatic lubricators (SYSTEM 24) for continuous re-lubrication.
Correct mounting is critical. SKF TMFT 36 fitting tool kit, induction heaters (TIH 030M/100M), and laser alignment tools ensure damage-free installation and maximum service life.
SKF Microlog and Enlight sensors for vibration, temperature, and speed monitoring. Enable predictive maintenance strategies to minimize unplanned downtime and optimize bearing replacement intervals.
| Parameter | Details |
|---|---|
| Model Designation | 3309a-2Z/C3 MT33 |
| Type | Double Row Angular Contact Ball Bearing |
| Rows Number | Double |
| Load Direction | Radial Bearing |
| Material | Bearing Steel |
| Precision Rating | P0, P2, P4, P5, P6 |
| Structure | Angular Contact |
| Cage | Steel Cage, Copper Cage, Nylon Cage |
| Lubrication | Oil, Grease |
| Trademark | SKF |
| Origin | Jiangsu China |
| Industry | Typical Equipment |
|---|---|
| General Machinery | Electric Motors, Gearboxes, Pumps, Fans |
| Manufacturing | Conveyors, Machine Tools, Compressors |
| Industrial Automation | Robotic Arms, Precision spindles, Material Handling Systems |
Industrial machinery operators know the cost of unexpected downtime—counterfeit bearings failing prematurely, delivery delays disrupting production schedules, and incomplete traceability documents causing customs clearance headaches. When your equipment relies on precise angular contact bearings, these issues don’t just slow operations—they directly impact your bottom line.
As an official SKF distributor, we eliminate these risks with the Double Row Angular Contact Ball Bearing 3309a-2Z/C3 MT33. Every unit comes with full traceability documentation, ensuring you receive 100% genuine SKF products that meet ISO 9001 standards. Our large centralized warehouse maintains ready stock, so you avoid the 30–50% lead time extensions common with multi-tier distributors. This bearing excels in industrial machinery like electric motors and gearboxes, where radial load capacity and precise alignment are critical.
The 3309a-2Z/C3 MT33 thrives in high-speed, moderate-load applications typical of industrial machinery. Its double row design delivers enhanced radial and axial load handling, while the 2Z steel shields provide effective protection against contamination in dusty or moist environments. Whether operating in temperature-stable workshops or variable outdoor settings, this bearing maintains consistent performance, reducing unplanned maintenance interruptions.
Key technical attributes set this bearing apart for industrial use. The C3 clearance class allows for thermal expansion during high-speed operation, preventing premature failure from internal stress. Multiple precision ratings (P0 to P6) let you match bearing accuracy to your equipment’s requirements—from general machinery (P0) to precision spindles (P5/P6). Available cage materials (steel, copper, nylon) offer flexibility: steel cages handle higher temperatures, while nylon options reduce noise in low-vibration applications. Combined with SKF’s bearing steel construction, these features ensure long service life under continuous operation.
Choosing non-genuine 3309a-2Z/C3 bearings may seem cost-effective initially, but the hidden expenses add up. Counterfeit units often fail within 30% of the expected lifespan, leading to repeated replacements, production downtime, and potential damage to mating components. In contrast, genuine SKF bearings undergo rigorous testing to meet global standards, minimizing failure risks. Our clients report 40% lower maintenance costs over two years by investing in authentic parts—proof that total cost of ownership, not upfront price, determines true value.
We’ve earned the trust of industrial equipment OEMs and maintenance teams in 60+ countries by delivering on four core commitments: official SKF authorization with full supply chain traceability, ISO 9001-compliant quality management with incoming and outgoing inspections, a SKF-certified technical team providing free model selection and installation guidance, and global door-to-door logistics with real-time shipment tracking. Our dedicated account managers oversee every order from quote to delivery, ensuring transparency at every step.
Don’t let bearing issues keep your machinery idle. Send us your bearing designation, application details (like operating speed and load), and required quantity—our team will provide a formal quotation within 24 hours, including brand authorization and traceability certificates. With our stock availability, you can have the 3309a-2Z/C3 MT33 delivered quickly to minimize production disruption.
Q: Are these genuine SKF bearings?
A: Yes. As an official SKF distributor, every bearing comes with full traceability documentation and brand authorization, ensuring authenticity.
Q: How do I confirm if the 3309a-2Z/C3 MT33 fits my equipment?
A: Provide your equipment model or operating parameters (load, speed, temperature), and our SKF-certified technical team will verify compatibility at no cost.
Q: What is the warranty policy?
A: All bearings are covered by SKF’s standard manufacturer warranty, with replacement guaranteed for any manufacturing defects.
Q: What is the minimum order quantity?
A: We accept orders for 1 unit, supporting both emergency repairs and small-batch procurement.
Q: How long does shipping take?
A: In-stock bearings ship within 3–7 business days via your choice of DHL, FedEx, UPS, air, or sea freight.
Q: How can I verify the bearing’s authenticity?
A: Each bearing includes SKF’s original packaging withé˜²ä¼ªæ ‡ç¾, laser-etched part numbers, and traceability documents. We can also provide official authorization letters upon request.
Ready to order or need a quote?
Send your bearing designation, application details, and quantity — we'll respond within 24 hours.
As an officially authorized SKF distributor, every bearing we supply carries full documentation from SKF's global manufacturing network -- with complete batch traceability from factory to your facility.
Every shipment includes official SKF certification of origin, verifying product authenticity and manufacturing source.
Full production batch traceability maintained for minimum 5 years. Enables quality audit and failure investigation.
Verified annually by SKF. Our authorized status can be confirmed directly through the SKF distributor verification system.
All products carry SKF manufacturer warranty. Defective products are replaced or refunded -- no questions asked.
SKF QR code and holographic seal on every package. Verify authenticity instantly via SKF's official verification portal.
Authorized Distributor
Shanghai Dunyu Bearing
Official SKF Authorized Distributor
ISO 9001
SKF Authorized
Full Traceability
All products shipped in original SKF packaging with anti-counterfeit seal, QR code, and batch label intact.
Standard export carton for small orders. Custom wooden crates with moisture-proof lining for large/heavy shipments.
Sea freight (FCL/LCL), air freight, and express (DHL/FedEx/UPS). DDP, DAP, CIF, FOB terms all supported.
In-stock items: 1-3 days dispatch. Air freight: 3-7 days door-to-door. Sea freight: 15-35 days by destination.
| Region | Mode | Transit Time | Incoterms |
|---|---|---|---|
| Europe | Sea / Air / Express | 15-25d / 5-7d / 3-5d | DDP · DAP · CIF · FOB |
| North America | Sea / Air / Express | 20-30d / 5-8d / 3-5d | DDP · DAP · CIF · FOB |
| Southeast Asia | Sea / Air / Express | 7-15d / 3-5d / 2-4d | DDP · DAP · CIF · FOB |
| Middle East | Sea / Air / Express | 15-25d / 4-7d / 3-5d | DDP · DAP · CIF · FOB |
| Other Regions | Sea / Air / Express | Upon Confirmation | FOB · CIF · Negotiable |
Every product we supply comes with original SKF packaging including an anti-counterfeit holographic seal and QR code. You can scan the QR code on the SKF official website to verify authenticity. We also provide the SKF Certificate of Origin with every shipment, and our authorized distributor status can be verified directly through SKF's global distributor portal.
There is no strict minimum order quantity for standard catalog items. We support single-piece sample orders for testing and evaluation. For bulk procurement and long-term supply programs, we offer preferential pricing and dedicated inventory reservation. Contact our sales team for a customized procurement plan.
We guarantee a formal quotation with full SKF traceability certification within 24 business hours of receiving your inquiry. For urgent requirements, our team can typically respond within 2 hours during business hours (Mon-Sat, 9:00-18:00 GMT+8). Contact us via WhatsApp for fastest response.
Yes, we fully support DDP, DAP, CIF, and FOB incoterms across 60+ countries. Our logistics team handles all export documentation, customs clearance, and last-mile delivery. We work with leading freight forwarders and express carriers (DHL, FedEx, UPS) to ensure reliable and timely delivery.
Absolutely. Our SKF-certified engineers provide comprehensive technical support including bearing selection, application analysis, failure investigation, and lubrication planning. We can also assist with housing selection, mounting tool recommendations, and condition monitoring solutions. Technical support is available 24/7 via email and WhatsApp.
We accept T/T (bank transfer), L/C (letter of credit) for large orders, and Western Union. Standard terms are 30% deposit with 70% balance before shipment. For established long-term customers with framework agreements, we offer net payment terms. All transactions are conducted in USD or EUR.
All products carry the full SKF manufacturer warranty. In the unlikely event of a defective product, we will arrange replacement or full refund -- no questions asked. Our quality team will also conduct a failure analysis to identify the root cause and prevent recurrence. Please retain the original packaging and documentation for warranty claims.
Still have questions? Chat with our SKF engineers →
Send us your bearing model, quantity, and delivery requirements. Our SKF-certified team will respond with a formal quotation, traceability certificate, and logistics plan.