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The 625 Deep Groove Ball Bearing is a precision-engineered miniature component designed for high-speed, low-noise applications in compact machinery. It offers reliable performance with flexible sealing options and strict dimensional accuracy, making it ideal for automation, robotics, and small electric motors.
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The 625 deep groove ball bearing represents the pinnacle of compact motion engineering, meticulously crafted to deliver frictionless rotation and unwavering stability within confined mechanical spaces. When integrated into precision devices, it emits a barely perceptible, smooth hum, reflecting its superior internal geometry and flawlessly polished raceways. The tactile feel of the rotation is exceptionally fluid, devoid of any granular resistance or micro-stuttering, which translates directly into reduced energy consumption and minimal heat generation for your end products. By minimizing internal friction, this component actively extends the operational lifespan of electric motors, robotic joints, and automated assemblies, thereby drastically reducing maintenance downtimes and warranty claims for your enterprise. Its robust structural integrity allows it to absorb both radial and mild axial stresses effortlessly, ensuring that your machinery operates at peak efficiency even under continuous, demanding duty cycles. Choosing this component means investing in a silent, durable, and highly efficient core that elevates the overall perceived value, acoustic purity, and mechanical reliability of your manufactured equipment.
Parameter | Value | Description |
Bearing Model | 625 | Deep Groove Ball Bearing |
Inner Diameter (d) | 5 mm | Shaft diameter |
Outer Diameter (D) | 16 mm | Housing bore diameter |
Width (B) | 5 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. 1.90 kN |
Static Load Rating (Cor) | Approx. 0.78 kN |
Note:Load ratings may vary slightly depending on bearing clearance, material selection, and lubrication conditions.
Bearing Version | Max Speed |
Open Type | ~34,000 RPM |
Metal Shield (ZZ) | ~30,000 RPM |
Rubber Seal (2RS) | ~20,000 RPM |
625 – Open type
625ZZ – Double metal shields
625-2RS / 625-2RS1 – Double rubber seals
Engineering excellence begins with components that refuse to compromise on reliability. Our 625 deep groove ball bearings are meticulously crafted to serve as the silent workhorses within your advanced machinery. By focusing on structural integrity and rotational fluidity, these components directly enhance the operational efficiency of your finished goods.
Frictionless Kinematics: Meticulously honed raceways eliminate micro-stutters, delivering a buttery-smooth rotation that drastically cuts down on energy loss and heat accumulation.
Acoustic Excellence: Engineered to operate with a whisper-quiet profile, ensuring your consumer electronics and office devices maintain a premium, noise-free user experience.
Thermal Resilience: Capable of maintaining dimensional stability across extreme temperature fluctuations from -20°C to +120°C, preventing lock-ups in demanding industrial environments.
Versatile Integration: The standardized geometry allows for drop-in replacements across a multitude of assembly lines, eliminating the need for costly redesigns or structural modifications.
Precision is the bedrock of seamless mechanical assembly. The standard 5x16x5mm dimensions of this bearing are controlled under stringent manufacturing tolerances, ensuring that every single unit drops perfectly into your housing without the need for secondary machining or force-fitting. Available in multiple precision grades from ABEC-1 up to ABEC-5, this component is tailored to match the exact exactitude your application demands.
Flawless Batch Consistency: Advanced CNC machining guarantees that the ten-thousandth unit is identical to the first, streamlining your automated assembly lines and reducing rejection rates.
Micro-Motor Compatibility: The exact 5mm inner bore provides a snug, slip-free fit on miniature shafts, preventing eccentric wobbling during high-speed rotation.
Adaptive Precision Tiers: Choose ABEC-5 for ultra-sensitive optical or medical devices, or ABEC-1 for standard mechanical linkages, optimizing your procurement budget based on actual needs.
Optimized Chamfer Design: The 0.3mm minimum chamfer ensures smooth insertion during automated pressing, reducing assembly time and preventing edge chipping on your shafts.
The longevity of your equipment relies heavily on the metallurgical integrity of its moving parts. We utilize premium Chrome Steel (GCr15) and high-grade Stainless Steel to forge bearings that withstand relentless mechanical fatigue. Through a meticulously controlled heat treatment process, the steel achieves an optimal balance of surface hardness and core toughness.
Wear-Resistant Surface: The hardened raceways resist micro-pitting and spalling, ensuring the bearing maintains its smooth tactile feel even after thousands of hours of continuous operation.
Corrosion Mitigation: The stainless steel variant offers exceptional resistance to moisture and mild chemical exposure, perfect for fluid-handling, medical, or outdoor applications.
Structural Tenacity: The high-carbon chromium steel composition provides immense resistance to deformation under sudden shock loads, protecting your internal mechanisms.
Extended Service Life: By minimizing internal wear, these materials drastically push back the maintenance intervals of your machinery, enhancing your brand's reputation for rugged durability.
Environmental contamination is the primary enemy of rotational components. To combat this, our bearings are engineered with versatile shielding and sealing architectures. Whether your equipment operates in a sterile laboratory or a dust-filled processing facility, we provide the exact barrier technology required to keep the internal lubricants pristine and the rolling elements protected.
Open Configuration: Ideal for sealed oil-bath environments where maximum speed and zero friction are paramount, allowing for unhindered fluid dynamics.
Double Metal Shields (ZZ): Provides a robust barrier against larger particulates and debris while maintaining excellent high-speed capabilities up to 30,000 RPM.
Double Rubber Seals (2RS): Creates an impenetrable defense against micro-dust, moisture, and fluid ingress, locking the premium grease inside for the lifetime of the component.
Contamination Resilience: The precise fit of the seals prevents abrasive particles from compromising the raceway, ensuring the rotational acoustics remain silent over time.
Acoustic signatures and vibrational feedback are critical indicators of mechanical quality. These bearings are manufactured to achieve Z1 and Z2 low-noise standards, transforming aggressive mechanical energy into a smooth, barely audible hum. With the capability to reach up to 34,000 RPM in the open configuration, they are the definitive choice for high-velocity applications.
Vibration Dampening: The optimized internal geometry and premium cage materials (Steel or Nylon) absorb micro-vibrations, preventing resonance from transferring to your machine's chassis.
High-Velocity Stability: Engineered to maintain perfect concentricity at extreme speeds, eliminating the risk of catastrophic failure in power tools or robotic actuators.
Acoustic Purity: The Z2 noise level certification ensures that office automation equipment and consumer appliances operate unobtrusively in quiet environments.
Fluid Dynamics: The interaction between the precision balls and the raceway is so refined that it feels like gliding on ice, drastically reducing the torque required to initiate movement.
Despite their compact footprint, these miniature components punch far above their weight class in terms of mechanical support. Delivering an approximate dynamic load rating of 1.90 kN and a static load rating of 0.78 kN, they provide a rigid, unyielding foundation for your rotational shafts. This exceptional load-bearing capacity ensures that your assemblies remain stable under both steady-state and fluctuating forces.
Dynamic Resilience: Capable of sustaining continuous radial forces while rotating, preventing premature fatigue in conveyor systems and drive mechanisms.
Static Rigidity: The 0.78 kN static rating ensures the bearing will not suffer from plastic deformation when subjected to sudden, non-rotating impacts or heavy resting weights.
Axial Support: While optimized for radial loads, the deep groove architecture allows for the accommodation of mild axial thrust in both directions, adding versatility to your design.
Stress Distribution: The precise conformity between the balls and the raceway ensures that mechanical stress is evenly distributed, preventing localized wear and extending the component's operational lifecycle.
We understand that off-the-shelf solutions often fall short of specialized engineering requirements. Our comprehensive manufacturing capabilities allow for deep customization, ensuring the component aligns perfectly with your unique operational parameters. From specific radial clearances to proprietary lubrication formulas, we tailor every aspect to elevate your product's performance.
Tailored Clearances (C0/C2/C3): Adjust the internal radial play to compensate for thermal expansion or to achieve extreme rigidity in precision instruments.
Application-Specific Lubrication: Choose from high-temperature greases for thermal processing equipment or low-viscosity oils for ultra-high-speed dental tools.
Private Labeling: Enhance your brand identity with custom laser marking on the bearing shields and bespoke packaging solutions for your distribution network.
Engineering Collaboration: Our technical team works directly with your engineers to validate performance metrics before initiating mass production, ensuring zero guesswork.
Material Selection: Opt for Nylon cages for reduced weight and noise, or stick to Steel cages for maximum temperature and chemical resistance.
A reliable component is only valuable if it can be sourced consistently and economically. Operating as a direct source manufacturer, we eliminate intermediary markups, providing a highly competitive pricing structure that directly benefits your bottom line. Our robust production capacity ensures that whether you are running a limited pilot build or a massive continuous assembly line, your supply remains uninterrupted.
Direct-Source Economics: Bypass distribution margins to secure premium components at a fraction of the cost, optimizing your overall bill of materials.
Scalable Production: Agile manufacturing lines allow us to fulfill both low-volume prototyping requests and high-volume continuous orders with identical lead times.
Inventory Stability: We maintain strategic reserves of standard configurations, ensuring rapid deployment to prevent costly production halts on your factory floor.
Global Logistics: Streamlined export protocols and robust packaging ensure that your components arrive in pristine condition, ready for immediate integration.
Selecting a manufacturing partner is a critical decision that impacts your entire operational ecosystem. We bring decades of specialized metallurgical expertise and precision engineering to the table, ensuring that every component we produce meets the highest echelons of quality. Our commitment extends beyond the factory floor; we are dedicated to providing seamless technical support and reliable logistics.
Uncompromising Quality Control: Every batch undergoes rigorous acoustic, dimensional, and metallurgical testing to guarantee zero defects upon arrival.
Deep Industry Expertise: Years of experience supplying critical components to the automotive, medical, robotics, and automation sectors.
Responsive Technical Support: Rapid communication channels ensure that your engineering queries and custom requests are addressed immediately by knowledgeable professionals.
Sustainable Manufacturing: Optimized production processes minimize material waste and energy consumption, aligning with modern environmental standards.
Long-Term Partnership Focus: We prioritize your operational success, offering flexible terms and dedicated account management to support your continuous growth.
To assist your engineering and procurement teams in making informed decisions, we have compiled answers to the most technical inquiries regarding our 625 deep groove ball bearings.
Selecting the correct radial clearance is vital for thermal management. In high-temperature applications, internal metal components expand. A larger clearance like C3 provides the necessary room for this thermal expansion, preventing the rolling elements from seizing against the raceway and ensuring smooth, uninterrupted rotation even at 120°C.
Robotic joints often operate in environments exposed to dust, moisture, or chemical sprays. The 2RS rubber seal creates a physical, contacting barrier that completely blocks micro-contaminants and retains lubrication. In contrast, the ZZ shield is non-contacting, offering less friction and higher speeds (up to 30,000 RPM), making it better suited for clean, ultra-high-speed environments rather than heavy contamination zones.
Absolutely. Standard industrial greases can congeal at sub-zero temperatures, causing severe rotational resistance. We offer specialized low-temperature synthetic lubricants that maintain their ideal viscosity, ensuring the bearing operates with minimal torque even in deep-freeze conditions down to -20°C and beyond upon custom request.
Higher ABEC grades (such as ABEC-3 and ABEC-5) mandate tighter tolerances on the raceway geometry and ball sphericity. This extreme precision eliminates microscopic internal collisions and wobbles during rotation. This directly translates to a Z2 low-noise profile, which is absolutely essential for premium, quiet consumer devices where acoustic purity is a major selling point.
We utilize automated CNC grinding and state-of-the-art optical inspection systems across our entire production line. This ensures that the critical 5x16x5mm dimensions remain perfectly consistent from the first unit to the millionth. Such strict adherence to tolerances guarantees seamless, jam-free integration into your automated assembly processes, drastically reducing your factory's rejection rates.
