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The NSK 6904DDU is a deep groove ball bearing with 20 mm bore and 37 mm OD. It features double contact rubber seals (DDU) for effective contaminant exclusion and a pressed steel cage. Suitable for electric motors, pumps, fans, and general industrial applications.
MODEL 6904DDU
$107.76 Each
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Bearings The **NSK 6904DDU 6900 Series Ball Bearing** is a high-performance bearing designed for a wide array of applications in the automotive and industrial sectors. With its robust construction and advanced sealing technology, this bearing ensures optimal performance and durability even in challenging environments. ## Key Features • **Type:** Deep groove ball bearing, ideal for high-speed applications. • **Dimensions:** Inner diameter of 20 mm, outer diameter of 37 mm, and a width of 9 mm. • **Sealing:** Double-lip rubber seal (DDU) on both sides for enhanced protection against contaminants and moisture. • **Load Capacity:** High radial load capacity, suitable for various dynamic loads. • **Material:** Made from high-quality steel, ensuring reliability and longevity. ## Applications • **Automotive:** Perfect for use in automotive applications such as wheel hubs, electric power steering, and axle assemblies. • **Industrial Machinery:** Suitable for general machinery, conveyor systems, and electric motors. • **Compatibility:** Designed to fit a range of equipment requiring precision bearings. ## Benefits • **Reduced Friction:** Engineered to minimize friction, resulting in improved energy efficiency and reduced wear. • **Long Service Life:** The robust construction and sealing enhance the bearing's lifespan, reducing maintenance costs over time. • **Versatile Use:** The NSK 6904DDU is versatile enough for various applications, making it a reliable choice for both industrial and automotive environments. --- *Product information compiled with AI assistance for reference purposes.*
How do I choose the right type of bearing for my application?
Start with the load and how it’s applied. You need to know if you’re dealing with radial loads, axial loads, or a mix of both. Then look at speed, operating environment, and space constraints. For example, ball bearings are great for high speed and lighter loads, while roller bearings handle heavier loads but usually at lower speeds. If there’s contamination, moisture, or heat involved, you may need sealed bearings or specific materials. In most cases, the right choice comes down to matching load type, speed, and environment to the bearing design.
What is the difference between deep groove and angular contact ball bearings?
Deep groove ball bearings are the most common type. They’re designed to handle mainly radial loads, but they can also take some axial load in both directions. They’re simple, versatile, and used in everything from motors to conveyors. Angular contact ball bearings are built for combined loads, especially where there’s significant axial force in one direction. They’re often used in pairs and are common in higher precision or higher load applications like pumps and gearboxes. If your load is mostly radial, go deep groove. If axial load matters more, angular contact is usually the better choice.
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