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The 6203 deep groove ball bearing is a versatile single-row component engineered for high radial loads and smooth operation in industrial machinery and OEM applications. Available in open, ZZ, and 2RS configurations, it delivers reliable performance with low noise and vibration.
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The 6203 Deep Groove Ball Bearing represents the pinnacle of mechanical craftsmanship, meticulously forged from premium GCr15 bearing steel to withstand the most rigorous operational environments. When integrated into your machinery, it operates with a whisper-quiet hum, a testament to its highly refined raceway geometry and superior surface finish. Every rotation feels exceptionally smooth, drastically reducing friction and heat generation, which in turn minimizes thermal expansion and prevents premature wear. By choosing this precision-engineered component, you are actively eliminating costly downtime and frequent maintenance cycles from your operational equation. The flawless metallic sheen of the polished steel reflects a commitment to exacting tolerances, ensuring that each unit drops perfectly into your housing assemblies. Whether driving heavy-duty electric motors or stabilizing rapid hydraulic pumps, this bearing transforms raw mechanical energy into seamless, vibration-free motion, ultimately enhancing the overall efficiency and longevity of your end products.
Parameter | Value | Description |
Bearing Model | 6203 | Deep Groove Ball Bearing |
Inner Diameter (d) | 17 mm | Shaft diameter |
Outer Diameter (D) | 40 mm | Housing bore diameter |
Width (B) | 12 mm | Bearing width |
Chamfer (r min) | 0.6 mm | Minimum chamfer size |
Item | Specification |
Bearing Structure | Single-row deep groove ball bearing |
Accuracy Grades | ABEC-1 / ABEC-3 / ABEC-5 |
Noise Level | Z1 / Z2 |
Seal / Shield Options | Open / ZZ / 2RS |
Bearing Material | GCr15 bearing steel / Stainless steel |
Cage Configuration | Steel cage / Polyamide cage |
Lubrication Method | Factory-filled grease or oil |
Operating Temperature | -20°C to +120°C |
Load Type | Value |
Dynamic Load Rating (Cr) | Approx. 9.70 kN |
Static Load Rating (Cor) | Approx. 4.40 kN |
Values are reference only. Actual ratings vary depending on bearing clearance, lubrication, and service conditions.
Bearing Version | Limiting Speed |
Open Type | ~18,000 RPM |
Metal Shield (ZZ) | ~14,000 RPM |
| Rubber Seal (2RS) | ~11,000 RPM |
6203 – Open bearing
6203ZZ – Double metal shielded
6203-2RS / 6203-2RS1 – Double rubber sealed
Engineered to elevate your machinery's performance, this bearing integrates advanced metallurgical science with practical application needs. We understand that equipment failure is not an option, which is why every feature is designed to maximize uptime and operational fluidity.
Frictionless Rotational Dynamics: The micro-polished raceways ensure a buttery-smooth glide, significantly cutting down energy consumption and extending the lifespan of your electric motors and drives.
Acoustic Excellence: Calibrated to strict Z1 and Z2 noise levels, the bearing operates with an almost imperceptible acoustic footprint, crucial for noise-sensitive environments like HVAC systems and precision automation.
Thermal Stability: The meticulously selected GCr15 steel maintains its structural integrity even under continuous high-speed friction, preventing warping and ensuring consistent dimensional accuracy.
Contaminant Exclusion: With precision-fitted ZZ shields and 2RS rubber seals, the internal rolling elements remain pristine, locking in vital lubrication while aggressively repelling abrasive dust and moisture.
To ensure our components perfectly align with your engineering requirements, we have optimized this bearing across seven critical dimensions. Each aspect is tailored to solve specific mechanical challenges and enhance your overall system performance.
Delivering a standardized 17x40x12mm footprint, this component is engineered for universal compatibility. By offering ABEC-1, ABEC-3, and ABEC-5 accuracy grades, we empower your engineering teams to select the exact tolerance required for your specific shaft and housing assemblies, ensuring a flawless, drop-in fit that eliminates vibration-inducing gaps.
Forged from high-grade GCr15 bearing steel or robust stainless steel, the physical density and structural hardness of this bearing are palpable. The optimized raceway geometry combined with strict heat treatment protocols ensures that radial stress is distributed evenly. This dramatically boosts fatigue resistance, allowing your equipment to run longer without the threat of sudden mechanical failure.
Operational environments dictate component survival. We offer the Open configuration for ultra-high-speed applications, the ZZ double metal shield to deflect solid debris and metal shavings, and the 2RS double rubber seal to create an impenetrable barrier against moisture and fine dust. This adaptability ensures your machinery remains protected, whether situated in a sterile cleanroom or a heavily polluted industrial site.
When the machine powers on, the difference is audible. Achieving Z1 and Z2 noise control levels, this bearing handles dynamic loads up to 9.70 kN while spinning at blistering speeds up to 18,000 RPM (in open configurations). It effortlessly absorbs complex radial forces without generating the harsh grinding sounds typical of lesser components, ensuring stable, high-velocity operation.
This is not a generic part; it is a targeted solution for high-stress industrial environments. Specifically designed to endure heavy radial loads over extended lifecycles, it serves as the mechanical heart for medium-to-large electric motors, industrial blowers, hydraulic pumps, and automated transmission systems. It is the definitive choice for manufacturers looking to upgrade their OEM machinery.
We recognize that standard off-the-shelf parts cannot solve every engineering puzzle. Our deep customization capabilities allow you to tweak internal clearances (C0/C2/C3) for specific thermal expansion needs, specify high-temperature or long-life lubricants, and even apply custom laser-etched branding. We provide comprehensive technical support from the initial blueprint stage right through to physical sample validation.
Procurement should be as seamless as the bearing's rotation. Sourced directly from our advanced manufacturing facilities, every batch undergoes stringent multi-step inspections to guarantee absolute consistency. This streamlined, direct-from-factory model not only secures a highly reliable supply chain for your long-term contracts but also significantly drives down your comprehensive procurement costs without sacrificing a fraction of quality.
Selecting the right manufacturing partner is as critical as the component itself. As a dedicated supplier, we bridge the gap between elite engineering and dependable supply chain execution, ensuring your production never misses a beat.
Uncompromising Quality Control: Every single bearing undergoes rigorous acoustic, dimensional, and metallurgical testing before leaving our facility, guaranteeing a zero-defect integration into your assembly lines.
Scalable Production Capacity: Our advanced manufacturing infrastructure is built to handle massive volume requirements without sacrificing the microscopic tolerances required for ABEC-5 precision.
Direct-from-Factory Economics: By streamlining the procurement process directly from the manufacturer, you benefit from aggressive cost savings while securing premium-grade mechanical components.
Technical Engineering Support: Our team of seasoned metallurgists and mechanical engineers is always on standby to assist with load calculations, clearance selections, and lubrication profiling for your specific projects.
To assist your procurement and engineering teams in making informed decisions, we have compiled answers to the most critical technical inquiries regarding this bearing model.
A: The ZZ (metal shield) is ideal for environments where you need higher speed capabilities (up to 14,000 RPM) and protection against larger solid particulates. The 2RS (rubber seal) is mandatory for environments exposed to moisture, liquids, or fine dust, though it slightly reduces the limiting speed to 11,000 RPM due to seal friction.
A: Yes. The standard operating temperature ranges from -20°C to +120°C. However, for continuous high-heat applications, we offer customized solutions featuring specialized high-temperature grease and optimized internal clearances (such as C3) to accommodate thermal expansion without seizing.
A: ABEC-1 provides excellent performance for standard industrial applications like fans and basic motors. ABEC-5 offers significantly tighter dimensional tolerances and superior runout accuracy, which is essential for precision automation, high-speed spindles, and applications where microscopic vibration must be entirely eliminated.
A: Internal clearance dictates the room for expansion within the bearing. C0 is the standard clearance suitable for most motors. C2 offers a tighter fit for high-precision, low-vibration needs. C3 provides extra room for expansion, making it critical for motors that generate substantial heat or operate under heavy continuous loads.
A: We employ automated CNC machining coupled with rigorous statistical process control (SPC). Every production run is subjected to multi-stage inspections, including laser dimensional scanning and acoustic vibration testing, ensuring that the ten-thousandth unit performs with the exact same precision and reliability as the first.
