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The 629 Deep Groove Ball Bearing is a precision-engineered miniature bearing designed for high load capacity, low noise, and stable operation in compact mechanical assemblies. It offers versatile sealing options and reliable performance for medium-speed, continuous-duty applications across industrial and automation equipment.
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The 629 Deep Groove Ball Bearing is a masterclass in precision engineering, meticulously crafted to transform raw mechanical power into seamless, whisper-quiet motion. When you examine this bearing, the flawless, mirror-polished finish of its chrome steel or stainless steel raceways speaks volumes about the advanced CNC machining and microscopic grinding processes utilized in its creation. Designed to effortlessly handle both radial and axial loads, it eliminates the harsh vibrations and grinding acoustics that plague inferior components, replacing them with a smooth, continuous hum characteristic of top-tier manufacturing. By integrating this bearing into your assemblies, you are not merely purchasing a mechanical part; you are investing in operational reliability that drastically cuts down on maintenance intervals and unexpected equipment downtime. The robust internal construction ensures that even under relentless continuous operation, the structural integrity remains completely uncompromised. Whether your machinery operates in pristine, temperature-controlled laboratory conditions or demanding, dust-filled industrial environments, the meticulous internal geometry and optimized load distribution of this bearing guarantee a frictionless experience that fundamentally enhances the overall value, longevity, and performance of your final product.
Parameter | Value | Description |
Bearing Model | 629 | Deep Groove Ball Bearing |
Inner Diameter (d) | 9 mm | Shaft diameter |
Outer Diameter (D) | 26 mm | Housing bore diameter |
Width (B) | 8 mm | Bearing width |
Chamfer (r min) | 0.3 mm | Minimum chamfer size |
Item | Specification |
Bearing Type | Deep Groove Ball Bearing |
Precision Grade | ABEC-1 / ABEC-3 / ABEC-5 |
Noise Level | Z1 / Z2 (low noise) |
Sealing Type | Open / ZZ / 2RS |
Material | Chrome Steel (GCr15) / Stainless Steel |
Cage Material | Steel / Nylon |
Lubrication | Grease or Oil |
Operating Temperature | -20°C to +120°C |
Load Type | Value |
Dynamic Load Rating (Cr) | Approx. 4.50 kN |
Static Load Rating (Cor) | Approx. 1.90 kN |
Note:Load ratings may vary slightly depending on bearing clearance, material selection, and lubrication conditions.
Bearing Version | Max Speed |
Open Type | ~26,000 RPM |
Metal Shield (ZZ) | ~20,000 RPM |
Rubber Seal (2RS) | ~14,000 RPM |
629 – Open type
629ZZ – Double metal shields
629-2RS / 629-2RS1 – Double rubber seals
Elevate your mechanical assemblies with a component designed to deliver uncompromising stability and efficiency. The 629 bearing is engineered to solve the most common challenges in rotary motion, from premature wear to excessive friction, ensuring your machinery operates at absolute peak performance.
Frictionless Rotation: Advanced raceway geometry minimizes rolling resistance, translating directly to lower energy consumption and significantly cooler operating temperatures during extended use.
Exceptional Load Management: Capable of sustaining a dynamic load rating of approximately 4.50 kN, providing a rock-solid foundation for heavy-duty and high-stress applications.
Acoustic Excellence: Rated strictly at Z1/Z2 noise levels, it guarantees a whisper-quiet operation that is absolutely essential for noise-sensitive environments like corporate offices and medical facilities.
Thermal Stability: Expertly formulated to maintain structural integrity and lubrication efficiency across a broad and demanding temperature spectrum from -20°C to +120°C.
Versatile Shielding Options: Choose from open designs, metal shields (ZZ), or rubber seals (2RS) to create an impenetrable barrier against external contaminants while locking in essential lubrication.
Understanding the multidimensional capabilities of your components is vital for engineering success. The 629 series has been meticulously developed across seven critical performance vectors to guarantee superior integration and operational excellence.
Achieving perfect alignment in complex machinery requires components with zero tolerance for error. The standardized 9x26x8mm dimensions, combined with selectable ABEC-1 through ABEC-5 precision grades, ensure a flawless, drop-in fit. This exactness drastically reduces equipment wear rates, minimizes vibration, and extends the overall lifecycle of your mechanical assemblies.
Material selection is the absolute cornerstone of mechanical longevity. Offering high-carbon chrome bearing steel (GCr15) and premium stainless steel options, this bearing easily supports dynamic loads up to 4.50 kN. This rugged durability actively resists corrosion and metal fatigue, significantly lowering long-term replacement and maintenance costs for end-users.
Industrial environments are inherently unpredictable, but your internal components shouldn't be. With Open, ZZ (double metal shields), and 2RS (double rubber seals) variants, this bearing adapts perfectly to any condition. Reaching blistering speeds up to 26,000 RPM in open configurations, it performs flawlessly whether situated in ultra-clean settings or moisture-heavy, dust-prone workspaces.
Vibration is the ultimate enemy of precision. By achieving Z1 and Z2 low-noise classifications and utilizing optimized steel or nylon cages, this bearing delivers exceptional smoothness during mid-to-high-speed continuous operation. It is the definitive choice for electric motors, precision instruments, and automation devices where silent, stable operation is paramount.
We understand that off-the-shelf solutions do not always meet specialized engineering needs. Our comprehensive customization capabilities include adjustable internal clearances (C0/C2/C3), application-specific lubricants (high-speed, low-noise, high-temperature), and personalized laser marking with bespoke packaging, fully supporting your brand's unique identity and technical requirements.
Reliability in manufacturing extends far beyond the product itself to the supply chain that delivers it. As a direct-from-factory supplier utilizing state-of-the-art CNC machining and advanced grinding technologies, we guarantee strict adherence to ISO international standards. Enjoy consistent lead times and a highly competitive cost structure, perfectly suited for flexible volume procurement.
A truly superior component proves its worth across diverse sectors. Rigorously market-tested, this bearing serves as a trusted transmission solution for industrial motors, automated conveyor systems, light machinery, fitness equipment, and highly sensitive medical laboratory devices, providing mature and reliable rotary support wherever it is deployed.
Partnering with the right manufacturer is a strategic decision that directly impacts your product's market success and operational reliability. We combine decades of metallurgical expertise with cutting-edge production facilities to deliver components that consistently exceed expectations in both performance and intrinsic value.
Direct Manufacturer Advantage: Eliminate unnecessary middlemen to secure the most competitive pricing structures and maintain transparent, direct communication channels.
Stringent Quality Control: Every single production batch undergoes rigorous microscopic inspection and dynamic load testing to ensure zero-defect delivery.
Scalable Production Capacity: From initial engineering prototyping runs to massive, continuous supply contracts, our agile manufacturing lines adapt seamlessly to your scheduling needs.
Dedicated Engineering Support: Our in-house team of mechanical experts is readily available to assist with complex load calculations, clearance selection, and custom lubrication strategies.
Global Logistics Expertise: We utilize highly optimized packaging and reliable international shipping networks to ensure your components arrive in pristine condition, precisely when your assembly lines need them.
Navigating the technical nuances of precision components is crucial for optimal integration. Below are expert answers to common engineering inquiries regarding the operational capabilities of the 629 series.
The Open type allows for maximum rotational velocity, reaching approximately 26,000 RPM due to the complete absence of seal friction. The ZZ (metal shield) variant offers an excellent balance of debris protection and speed, peaking at around 20,000 RPM. The 2RS (rubber seal) provides the highest level of liquid and dust protection but introduces slight contact friction, limiting the maximum operational speed to approximately 14,000 RPM.
Chrome Steel (GCr15) offers superior surface hardness and exceptional load-bearing capacity, making it the ideal choice for standard industrial environments where heavy radial loads are prevalent. Stainless Steel sacrifices a minor fraction of load capacity but provides critical, long-lasting resistance to oxidation and corrosion, which is strictly mandatory for food processing equipment, medical devices, or high-moisture environments.
Yes, we offer C0 (standard), C2 (tight), and C3 (loose) radial clearance options. For applications involving elevated operating temperatures or tight press-fit installations where significant thermal expansion of the shaft or housing is anticipated, selecting a C3 clearance ensures the rolling elements maintain optimal contact angles without seizing or causing premature failure.
Standard units are pre-lubricated with a premium general-purpose lithium-based grease. However, we provide specialized lubrication profiles upon request. This includes high-speed oils for rapid acceleration tasks, ultra-low-noise greases for acoustic-sensitive equipment, and high-temperature synthetic greases capable of withstanding extreme thermal stress up to +120°C without degrading.
The ABEC scale scientifically measures the dimensional accuracy and rotational tolerance of the bearing. An ABEC-1 rating is highly cost-effective and perfectly suitable for standard mechanical applications. Upgrading to ABEC-3 or ABEC-5 tightens the runout tolerances to a microscopic level, resulting in significantly smoother operation, better high-speed stability, and enhanced shaft alignment for precision instrumentation.
If you are sourcing a 629 deep groove ball bearing manufacturer or OEM partner, contact us today. We provide professional technical support, competitive pricing, and reliable delivery.
