Sill Bearing
Sill Bearing
SILL BEARING FACTORY, is located in the beautiful and affluent place named Hangzhou Bay New Zone, which is not only close to the two biggest ports of China—Shanghai port and Ningbo Port, but also adjacent to Hangzhou—Ningbo Expressway, 329 State Line and Hangzhou- Ningbo Railway Line. Besides, it owns the advantage of transportation, as it only takes about 90 minutes to go to Hangzhou Xiaoshan Airport or Ningbo Lishe Airport.
As a leading China 6311 bearing supplier, our proximity to global shipping lanes ensures that we can provide rapid delivery and reduced logistics costs for international procurement teams. Our facility integrates advanced R&D with precision manufacturing to meet the rigorous demands of modern industry.
The 6311 bearing is a critical component in the global industrial landscape. Known for its versatility, this single-row deep groove ball bearing is designed to handle both radial and axial loads in both directions. With a bore diameter of 55mm, an outside diameter of 120mm, and a width of 29mm, it offers a robust balance of speed, durability, and load capacity.
Inner Diameter
Outer Diameter
Width (B)
Precision Level
In the era of Industry 4.0, the demand for "Smart Bearings" is rising. Modern 6311 bearings are now expected to operate under extreme conditions with minimal maintenance. The global trend is moving towards energy-efficient mechanical systems, where low-friction torque and high-precision rotation are paramount. As a top-tier factory, we are integrating advanced material science—such as high-nitrogen steel and specialized heat treatments—to enhance the fatigue life of our bearings by up to 30%.
Global procurement managers today look beyond just the price. They seek reliability, supply chain transparency, and technical support. Our 6311 bearings are engineered to meet international standards such as ISO 9001 and IATF 16949, making them suitable for localized applications across Europe, North America, and Southeast Asia.
Used in wind turbine generators and solar tracking systems where long-term durability is essential.
Providing low-noise and high-speed stability for the latest generation of EV drivetrains.
Engineered to withstand heavy radial loads in vibratory screens and crushing equipment.
The "Made in China" label in the bearing industry has evolved. Today, it stands for High Performance at Scale. Our factory leverages the complete industrial supply chain of the Hangzhou Bay area to offer:
Furthermore, our geographic advantage near Shanghai and Ningbo Ports allows us to offer "Just-In-Time" (JIT) delivery options, reducing the inventory pressure on our global clients. Whether you are an OEM or a large-scale distributor, our production capacity ensures that we can handle bulk orders for the 6311 series with consistent quality.
The 6311 deep groove ball bearing is ubiquitous in both urban and industrial settings. Let's look at some specific scenarios where our products excel:
In medium-to-large electric motors, the 6311 bearing is often the preferred choice for the drive end. Its ability to maintain structural integrity under high centrifugal forces makes it ideal for 2-pole and 4-pole motors used in HVAC systems and water treatment plants.
Farmers across the globe rely on machinery that operates in harsh, dusty, and wet conditions. Our 6311-2RS (double rubber seal) variants provide superior protection against contaminants, extending the life of tractors, harvesters, and irrigation pumps.
In cement mixers and conveyor systems, the bearings are subjected to constant shock loads. Our 6311 bearings with C3 clearance allow for thermal expansion, preventing premature failure during continuous heavy-duty operation.
Choosing the right China 6311 bearing supplier is a decision that impacts the efficiency and lifespan of your machinery. At SILL BEARING FACTORY, we don't just sell products; we provide engineering solutions. Our commitment to quality, combined with our logistics advantage in the Hangzhou Bay New Zone, makes us the ideal choice for businesses looking to optimize their supply chain.
Whether you require standard 6311 deep groove ball bearings or specialized variants with unique lubricants and seals, our team is ready to assist. Contact us today for a technical consultation or a bulk quotation and experience the difference of precision-engineered Chinese bearings.
