Description

SKF 6004-2Z – Single Row Deep Groove Ball Bearing (Double Shielded)

The SKF 6004-2Z is a high-performance single row deep groove ball bearing designed for versatile industrial and automotive applications requiring precision, low noise, and long service life. Manufactured by SKF, a global leader in bearing technology, this bearing is part of the 6000 series, recognised for its compact dimensions, reliable performance, and efficient operation at high speeds.

The 6004-2Z is shielded on both sides with non-contact metal shields (2Z) to prevent the ingress of dust and other contaminants, while retaining lubricant within the bearing. This ensures reduced maintenance and enhanced operational life, making it ideal for use in motors, pumps, gearboxes, fans, and a wide range of other machinery.

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Technical Specifications:

• Bore Diameter (ID): 20 mm

• Outside Diameter (OD): 42 mm

• Width: 12 mm

• Weight: Approx. 0.068 kg

• Dynamic Load Rating (C): 9.95 kN

• Static Load Rating (C₀): 4.75 kN

• Fatigue Load Limit (Pu): 0.2 kN

• Limiting Speed (Grease Lubrication): Approx. 19,000 RPM

• Design: Single Row Deep Groove Ball Bearing

• Shields: 2Z – Metal shields on both sides

• Internal Clearance: Normal (or C3 variant available)

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Design and Functional Features:

1. Single Row Deep Groove Geometry

The SKF 6004-2Z has deep raceway grooves with close conformity between the raceways and balls. This geometry allows it to accommodate radial loads and limited axial loads in both directions. Its design ensures low friction, quiet operation, and high-speed performance, making it one of the most versatile bearing types available.

2. 2Z Metal Shields

The “2Z” suffix indicates that this bearing is fitted with metal shields on both sides, which:

• Protect the interior components from dust, dirt, and small particles

• Retain the factory-applied grease for extended lubrication life

• Reduce maintenance frequency

• Enable operation at higher speeds compared to rubber-sealed bearings

These non-contact shields do not create friction, which helps maintain efficient rotation and low operating temperatures.

3. High-Speed and Low-Noise Operation

The SKF 6004-2Z is capable of handling speeds up to 19,000 RPM, making it ideal for high-speed machinery. Its low-noise design is especially useful in applications like HVAC units, electric motors, and domestic appliances, where noise and vibration reduction are important.

4. Premium Materials and Construction

Made from high-quality chromium steel, this bearing features:

• Superior wear and fatigue resistance

• High dimensional stability under load and temperature variations

• Precision-ground raceways and balls for optimal performance

SKF’s rigorous manufacturing standards ensure consistent quality and reliability under all operating conditions.

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Applications:

The SKF 6004-2Z is suitable for a wide range of industries and machines, including:

• Electric motors and generators

• Pumps and compressors

• Gearboxes and transmissions

• Industrial fans and blowers

• Conveyor systems

• Household appliances (washing machines, dryers)

• Power tools and automation equipment

Its versatility, speed capability, and maintenance-free operation make it an excellent choice for both OEM installations and replacements.

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Key Benefits:

• Double shielding reduces contamination and extends lifespan

• High-speed capacity with low noise and low friction

• Supports radial and light axial loads in both directions

• Maintenance-free under normal operating conditions

• Compact and lightweight design

• Interchangeable with standard 6004 bearings across brands

• Cost-effective solution for long-term use

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Operating Conditions:

• Temperature Range: -30°C to +120°C (with standard grease)

• Lubrication: Pre-lubricated with high-quality grease

• Installation: Easy to mount with standard tools; ensure proper shaft and housing fit

• Misalignment Tolerance: Limited; use precision housings for best results

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Packaging and Handling:

Each SKF bearing is securely packaged and sealed to prevent contamination during transport and storage. Handle with clean gloves and proper tools to avoid damage to seals or raceways. Store in a dry, cool place away from direct sunlight or corrosive materials.

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Summary:

The SKF 6004-2Z deep groove ball bearing is a robust, high-speed, double-shielded bearing designed for precision and durability in demanding applications. With excellent protection from contaminants, low-friction performance, and SKF’s trusted engineering, it offers long-term reliability and minimal maintenance. Whether you’re building, maintaining, or upgrading machinery, the SKF 6004-2Z is an excellent choice for high-performance rotary motion needs.

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