Deep Groove Ball Bearings
SKF ball, roller and mounted bearings for machine builders, distributors and project buyers

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SKF 6204 Deep Groove Ball Bearing 20×47×14 mm utilizes a single-row, non-aligning radial design crafted from premium bearing steel to efficiently manage standard radial loads across various industrial applications.
Product Details
Mixed-Brand Sourcing Covered — Consolidate SKF 6204 deep groove ball bearing orders with other premium lines in a single shipment to simplify your global supply chain.
| Parameter | Value |
|---|---|
| Designation | SKF 6204 |
| Bearing Type | Deep Groove Ball Bearing |
| Bore Diameter (d) | 20 mm |
| Outside Diameter (D) | 47 mm |
| Width (B) | 14 mm |
| Seal or Shield Type | Zz, 2RS, Open |
| Precision Class | P0, P6, P5, P4 |
| Vibration | Z1V1, Z2V2, Z3V3 |
| Arrangement | Non-Aligning Bearing |
| Number of Rows | Single |
| Load Direction | Radial Bearing |
| Material | Available in bearing steel or stainless steel variants |
| Contact Angle | 0° |
| Origin | Japan |
| HS Code | 8482102000 |
| Industry | Typical Applications |
|---|---|
| Automotive | Alternator pulleys and transmission shafts |
| Electric Motors | Rotor shaft support in industrial drive units |
| Pumps | Impeller shaft alignment in centrifugal water pumps |
| Gearboxes | High-speed input shaft radial support |
| Conveyors | Idler roller rotational joints in material handling |
Standard radial play often causes thermal seizure under continuous high-temperature duty.
Early in my career managing onsite installations in Ethiopia, I supplied standard clearance units for local mining water pumps. The continuous operation combined with elevated ambient heat caused thermal expansion, leading to sudden seizure and unplanned downtime. We had to rush replacement units with expanded clearance to save the project. Since then, verifying the exact internal play is my first step when specifying a SKF 6204 deep groove ball bearing for demanding environments. Overlooking this single parameter accounts for a significant share of premature failures in heavy-duty fluid handling. Many procurement teams focus solely on the outer dimensions while ignoring the thermal dynamics of the actual operating environment, which inevitably compromises the entire drive system.
Electric motors and reduction gearboxes require components that handle steady radial loads without generating excessive friction. The SKF 6204 deep groove ball bearing delivers this stability through its optimized raceway geometry. Our engineering team cross-checks your specific load profiles against the manufacturer's dynamic ratings to ensure the selected configuration matches your operational reality.
Pumping environments constantly expose rotating shafts to fluctuating temperatures and abrasive particulate ingress. When ambient heat rises, standard internal clearances can vanish as the inner ring expands faster than the housing, creating destructive preload. Selecting the appropriate seal or shield configuration is equally critical to prevent slurry infiltration while minimizing friction torque. Proper lubrication intervals must also be adjusted based on the actual operating temperature to prevent grease degradation. Furthermore, vibration from adjacent machinery can accelerate fatigue if the baseline radial load capacity is continuously exceeded by unexpected hydraulic shocks.
The fundamental geometry of this model features a 20 mm bore, 47 mm outside diameter, and 14 mm width, providing a compact footprint for standard shaft designs. As a single-row, non-aligning radial unit, it relies on precise shaft and housing tolerances to maintain optimal load distribution. While the standard construction utilizes high-carbon bearing steel for excellent fatigue resistance, alternative material options are available in ceramic or stainless steel variants for specialized applications. The zero-degree contact angle ensures pure radial load transmission, making it highly efficient for high-speed electric motor rotors where axial forces remain minimal. Understanding these baseline characteristics allows maintenance engineers to predict performance accurately when upgrading older drive assemblies.
Installing a component with inadequate internal clearance in a high-heat application inevitably leads to catastrophic damage. The resulting friction generates excessive localized heat, destroying the raceway surfaces and compromising the entire shaft assembly. Such unplanned downtime disrupts production schedules and voids equipment warranties. Following the failure analysis frameworks outlined in industry standards helps procurement teams recognize that the initial savings from ignoring thermal expansion factors are quickly erased by replacement costs. The collateral damage to adjacent seals and motor windings often multiplies the total repair budget significantly beyond the price of the failed component itself.
Sourcing genuine components requires more than just matching a part number on a purchase order. We verify the original factory batch traceability documentation for every SKF 6204 deep groove ball bearing to eliminate counterfeit risks. Our technical team actively reviews your application parameters to prevent the common mistake of ordering standard clearance when expanded play is required. By consolidating mixed-brand requirements into full container shipments, we reduce your logistics overhead. Furthermore, our cross-brand equivalent model consultation ensures your maintenance schedule stays on track even if specific production allocations face delays.
To ensure the selected unit perfectly matches your machinery, please share your specific radial and axial load values, operational speeds, and expected temperature ranges. Providing the original equipment manufacturer part numbers allows our engineers to perform accurate cross-reference verification. This technical review guarantees the internal clearance and sealing configurations are optimized for your exact L10 life requirements.
Q: How can I verify the authenticity and traceability of the received units?
A: Every shipment includes original factory batch traceability documentation and a Certificate of Conformity. You can also authenticate the units via the official brand application using the QR code printed on the packaging, ensuring the internal components match the exact manufacturing records.
Q: What are the differences between the available seal and shield configurations?
A: Metal shields provide excellent protection against large particulate ingress while maintaining low friction for high-speed electric motors. Rubber seals offer superior defense against moisture and fine dust in pump applications, though they generate slightly higher friction torque due to contact with the inner ring.
Q: How do I choose the correct precision class for my specific application?
A: Standard P0 class is suitable for general conveyors and household appliances where extreme rotational accuracy is unnecessary. For high-speed electric motors or precision gearboxes requiring minimal vibration and noise, upgrading to P6 or P5 ensures tighter dimensional tolerances and smoother raceway finishes.
Q: How can I cross-reference equivalent models if this specific brand is unavailable?
A: Our engineering team provides cross-reference consultation to identify dimensionally and functionally identical alternatives from other premium global manufacturers. By matching the 20x47x14 mm dimensions, load ratings, and internal clearance, we ensure the substitute unit fits your existing housing without requiring mechanical modifications.
Before You Enquire
A complete enquiry ties every price to the right execution, drawing and project stage. It also catches the sleeves and locking components that BOMs often leave out.
Send Your BOMWhere It Fits
This bearing is listed for the applications below. Open each one to see the related product categories.
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Perguntas Frequentes
The exact execution is confirmed before you accept a product quote. Share the BOM line and drawing revision. If the marking on an old bearing is incomplete, send a clear photo and note what still needs checking.
List each stage as its own quantity with its own required date. Prototype, production and spare quantities can then appear separately in one project quote, so planners can schedule each stage on its own timing.
State the BOM line, the drawing revision and whether alternatives are allowed. A separately identified alternative is settled before the product quote is accepted. Technical changes require buyer approval, so your design engineer keeps control of the specification.
Product documents are confirmed at the written quote stage, order by order. List the documents your project requires in your enquiry. Transport documents are confirmed with the shipping arrangements for the order.
Request a Quote
SKF Mechanical and Electrical Equipment supplies SKF ball, roller and mounted bearings to buyers worldwide. Your written quote states model, quantity, price and currency, availability, estimated lead time and validity.