Mining & Metallurgy
Crushers, mills, conveyors, and smelting equipment under heavy radial/axial loads.
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100% Genuine SKF
Full Traceability
ISO 9001 Certified
SKF Authorized
Spherical Roller Bearings
SKF Spherical Roller Bearing 21305 21306 21307 for Mining Equipment with Long Life
SKF Spherical Roller Bearing 21305 21306 21307 for Mining Equipment with Long Life
In Stock · Ready to Ship
<p>Maximize mining equipment uptime with <strong>SKF spherical roller bearings</strong> engineered for extended service life in heavy-duty operations. The 21305 (25*62*17mm), 21306, and 21307 models deliver exceptional load handling and vibration resistance, directly addressing the critical need for reliable performance in harsh mining environments.</p><ul><li>Long-life design reduces replacement frequency, minimizing production interruptions and lowering maintenance costs</li><li>Precision manufacturing ensures consistent batch quality, eliminating compliance concerns for global supply chains</li><li>High-speed capability with low noise operation enhances equipment efficiency while maintaining a safer work environment</li></ul><p>As an official SKF distributor, we provide full traceability documentation and dedicated technical support to keep your mining operations running smoothly. Customizable options available to match specific equipment requirements.</p>
Bore (d)
--
Outer Dia. (D)
--
Width (B)
--
Dynamic C
--
Static C₀
--
Speed Limit
--
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
Full Specifications
Complete Technical Parameters
SKF Spherical Roller Bearing 21305 21306 21307 for Mining Equipment with Long Life -- Parameter Sheet
SKF · Spherical Roller Bearings
| Parameter | Value | Unit / Note |
|---|---|---|
| Bearing Series | -- | Spherical Roller Bearings |
| Bore Diameter (d) | -- | mm |
| Outer Diameter (D) | -- | mm |
| Width / Height (B) | -- | mm |
| Dynamic Load Rating (C) | -- | kN |
| Static Load Rating (C₀) | -- | 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. | -- | -- |
* All specifications are reference values. Contact our SKF engineers for application-specific confirmation.
Application Scenarios
Compatible Industrial Applications
Engineered for demanding industrial environments, this SKF bearing series delivers reliable performance across a wide range of heavy-duty and precision applications.
Power Generation
Wind turbines, generators, gearboxes, and turbine main shafts.
Heavy Machinery
Cranes, presses, rolling mills, and large industrial gearboxes.
Marine & Offshore
Ship propulsion systems, deck machinery, and offshore platforms.
Cement & Construction
Kiln drives, ball mills, bucket elevators, and vibrating screens.
Pulp & Paper
Paper machine rolls, dryer sections, and calender rolls.
Full Portfolio
One-Stop SKF Supporting Solutions
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Bearings: Deep Groove · Spherical · Cylindrical · Tapered · Thrust · Angular Contact
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Sealing: Radial shaft seals · V-rings · Labyrinth seals · Bearing isolators
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Lubrication: LGMT 2/3 grease · Automatic lubricators · Centralized systems
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Mounting Tools: Induction heaters · Fitting kits · TMFT 36 · Alignment tools
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Housings: Plummer blocks · Flanged housings · Split housings · Adaptor sleeves
Need Application Advice?
SKF-Certified Engineer
Selection · Failure analysis · Technical support
Technical Expertise
SKF Global Standards & Supporting Solutions
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.
Internal Design
SKF E1 Geometry
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.
ISO / ABEC Standards
Precision Tolerance
Manufactured to ISO P0-P6 tolerance classes. Dimensional accuracy and running accuracy are 100% verified before shipment, with full batch traceability records.
SKF Sealing Systems
Sealing Solutions
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.
SKF Lubrication Systems
Lubrication Planning
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.
SKF Maintenance Tools
Mounting & Alignment
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.
Predictive Maintenance
Condition Monitoring
SKF Microlog and Enlight sensors for vibration, temperature, and speed monitoring. Enable predictive maintenance strategies to minimize unplanned downtime and optimize bearing replacement intervals.
Product Details
Product Specifications
| Parameter | Details |
|---|---|
| Model NO. | 21305 |
| Feature | Long Life, High Speed, Low Noise |
| Specification | 25*62*17mm |
| Trademark | SKF |
| Origin | Sweden |
| HS Code | 8482300000 |
| Sample | Available |
| Customerized | Customizable |
| Transport Package | Carton Pallet |
| Package Size | 5.00cm * 9.00cm * 4.00cm |
| Package Gross Weight | 0.160kg |
Application Industries
| Industry | Typical Equipment |
|---|---|
| Mining | Crushers, Conveyors, Mining Drills |
| Industrial Machinery | Gearboxes, Fans, Pumps |
| Automotive | Transmission Systems, Axles |
Stop Mining Downtime with Genuine SKF Spherical Roller Bearings 21305-21307
Mining operations lose thousands daily to unexpected bearing failures—especially when counterfeit parts slip through gray market channels. Inconsistent delivery from multi-tier distributors forces maintenance teams into emergency sourcing, while unqualified suppliers offer no technical support when installations go wrong. These are the realities mining equipment OEMs and maintenance providers face every day.
Genuine SKF Spherical Roller Bearings for Uninterrupted Mining Operations
As an official SKF authorized distributor, we deliver 100% traceable SKF spherical roller bearings directly from SKF's Swedish production facilities. Our centralized warehouse stocks the full range including 21305, 21306, and 21307 models—critical components for mining crushers, conveyors, and drilling equipment. Each bearing undergoes ISO 9001-compliant quality checks before shipping, ensuring the long life performance your operations depend on.
Engineered for Extreme Mining Conditions
SKF spherical roller bearings excel in the harsh environments of mining equipment. Designed to handle heavy radial loads up to 120 kN and moderate axial loads, these bearings accommodate misalignment up to 2 degrees—vital for equipment operating under constant vibration and shock. The 21305 model (25*62*17mm) delivers optimal performance in gearboxes and conveyor rollers, where high speed (up to 6700 r/min) and low noise are critical for continuous operation.
Technical Advantages That Maximize Equipment Uptime
The long life feature stems from SKF's precision manufacturing: heat-treated raceways with superior surface finish reduce friction and wear, while the optimized cage design ensures even load distribution across rolling elements. The 21305 bearing's 25mm bore diameter and 62mm outer diameter balance compact size with load capacity, making it ideal for space-constrained mining machinery. Low noise operation minimizes operator fatigue, while high speed capability allows equipment to run at peak efficiency without overheating.
Why Genuine SKF Bearings Lower Total Cost of Ownership
Counterfeit mining equipment bearings may cost 30% less upfront, but data shows they fail 5-7 times faster, causing unplanned downtime averaging 48 hours per incident. Genuine SKF bearings, backed by SKF global standards, typically deliver 3-5 times longer service life in mining applications. When factoring in repair labor ($120-150/hour), replacement parts, and lost production (up to $10,000/hour for mining operations), the true cost of counterfeits becomes clear.
Your Trusted Partner for Mining Bearing Solutions
With 15+ years as SKF's authorized distributor, we serve 60+ countries including major mining regions in Southeast Asia, Middle East, and Belt & Road areas. Our SKF-certified technical team provides free model selection based on your specific mining equipment parameters—from conveyor belt tension to crusher load factors. We maintain $5M+ inventory across 3 regional warehouses, enabling emergency delivery within 72 hours to critical mining sites. Every order includes complete traceability documentation, ensuring customs clearance compliance for international projects.
Packaging & Shipping
- Original SKF packaging with tamper-proof seals and batch traceability labels
- Reinforced carton pallets for secure transport in mining logistics
- 3-7 business days delivery for in-stock models via DHL/FedEx/UPS
- Real-time tracking provided from warehouse dispatch to site delivery
- Minimum order quantity: 1 piece for emergency repairs
Get Your SKF Mining Bearings Delivered Fast
Your mining equipment can't wait—every hour of downtime eats into production targets. Send us your bearing model list (including 21305, 21306, 21307), equipment type, and required quantity. Our team will confirm stock availability and issue a formal quote with traceability certificates within 24 hours.
Frequently Asked Questions
Q: Are these 100% genuine SKF bearings?
A: Yes. As an official SKF authorized distributor, all products are sourced directly from SKF and include full traceability documentation and brand authorization certificates.
Q: How do I confirm if 21305 is the right bearing for my crusher?
A: Provide your equipment model, operating speed, and load conditions. Our SKF-certified technical team will verify compatibility and recommend optimal bearing selection.
Q: What is the warranty policy?
A: All SKF bearings come with the standard SKF manufacturer warranty, covering manufacturing defects with unconditional replacement.
Q: What is the minimum order quantity?
A: We accept orders starting from 1 piece to support emergency maintenance needs.
Q: How quickly can you deliver to remote mining sites?
A: In-stock models ship within 24 hours, with door-to-door delivery via express carriers (3-7 days) or air freight for remote locations.
Q: How can I verify bearing authenticity?
A: Each bearing includes SKF's laser-etched part number, holographic packaging label, and batch code. We provide digital traceability reports linking to SKF's production records.
Ready to order or need a quote?
Send your bearing designation, application details, and quantity — we'll respond within 24 hours.
Authenticity & Warranty
Genuine SKF Traceability & Quality Commitment
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.
SKF Certificate of Origin
Every shipment includes official SKF certification of origin, verifying product authenticity and manufacturing source.
Batch Traceability Records
Full production batch traceability maintained for minimum 5 years. Enables quality audit and failure investigation.
SKF Authorized Distributor Status
Verified annually by SKF. Our authorized status can be confirmed directly through the SKF distributor verification system.
Quality Warranty
All products carry SKF manufacturer warranty. Defective products are replaced or refunded -- no questions asked.
Anti-Counterfeit Verification
SKF QR code and holographic seal on every package. Verify authenticity instantly via SKF's official verification portal.
Authorized Distributor
DY
Shanghai Dunyu Bearing
Official SKF Authorized Distributor
- Auth. Since
- 2010+
- Quality Std.
- ISO 9001
- Coverage
- Full SKF Portfolio
- Verification
- SKF Global Portal
ISO 9001
SKF Authorized
Full Traceability
Logistics & Packaging
Packaging & Global Shipping
Original SKF Packaging
All products shipped in original SKF packaging with anti-counterfeit seal, QR code, and batch label intact.
Export Carton + Wooden Crate
Standard export carton for small orders. Custom wooden crates with moisture-proof lining for large/heavy shipments.
Multi-Modal Shipping
Sea freight (FCL/LCL), air freight, and express (DHL/FedEx/UPS). DDP, DAP, CIF, FOB terms all supported.
Delivery Timeline
In-stock items: 1-3 days dispatch. Air freight: 3-7 days door-to-door. Sea freight: 15-35 days by destination.
Shipping Terms & Regions
| 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 |
Related Products
Related Models & Supporting Components
FAQ
Frequently Asked Questions
How do I verify the product is 100% genuine SKF?
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.
What is the minimum order quantity (MOQ)?
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.
How long does it take to receive a formal quotation?
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.
Do you support DDP (Delivered Duty Paid) shipping?
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.
Can you provide technical support for bearing selection?
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.
What are the payment terms?
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.
What happens if I receive a defective product?
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 →
Start Your Procurement
Get a Formal Quote
Within 24 Hours.
Send us your bearing model, quantity, and delivery requirements. Our SKF-certified team will respond with a formal quotation, traceability certificate, and logistics plan.
- 100% Genuine SKF with Certificate of Origin
- Formal quotation within 24 hours
- Sample orders & bulk supply supported
- DDP/DAP/CIF to 60+ countries
- Dedicated SKF-certified account manager
Send Inquiry -- SKF Bearing Specialist Online