Core Advantages and Technical Details of Single-row + 2RS Deep Groove Ball Bearings

• Strong Adaptability of Sealing Protection: The 2RS contact seal is made of nitrile rubber (NBR) or fluororubber (FKM), with the lip tightly fitting the inner ring, providing a static contact pressure of 3-5N and a dynamic friction coefficient ≤0.002. In industrial environments with dust concentration ≤10mg/m³ and relative humidity 40%-80%, it can extend bearing life by more than 50%, effectively blocking solid particles ≥5μm in diameter and liquid droplets, while preventing grease oxidation and leakage under working conditions below 120°C. For machine tool spindles and conveying equipment with mild contamination, its sealing structure can reduce maintenance frequency by 90%.
• Balanced Speed Performance: The rated speed of 4500 rpm is tested based on ISO 15312 standard, achieved under the conditions of grease filling amount 30%-40% of the internal bearing space and radial clearance Class C3 (15-25μm). This speed covers the working condition requirements of more than 80% of general mechanical equipment, such as small motors (power 0.5-5.5kW), water pumps (flow rate 10-50m³/h), and ordinary machine tool spindles (machining accuracy IT7-IT8). When the speed drops to 3000 rpm, the bearing temperature rise can be controlled within 40K, meeting the requirement of 1000 hours of continuous operation without failure.
• High Cost Performance: The single-row structure adopts a stamped steel cage (Model 202 series) or glass fiber reinforced nylon cage (Model 62 series), with 30% fewer production processes than double-row bearings and 15% higher raw material utilization. On the premise of meeting basic transmission requirements (radial load ≤40% of the rated dynamic load), the purchase cost is only 60%-70% of that of angular contact bearings of the same size, and the annual maintenance cost (including grease replacement and seal replacement) can be saved by 200-500 yuan per equipment.

📊 Supplementary Subdivision of Application Scenarios and Working Condition Parameters

• Automated Assembly Lines: When this bearing is used for conveying rollers (diameter 50-100mm), the linear speed can reach 1.5-3m/s, and the axial movement is ≤0.1mm, meeting the positioning accuracy requirements of sorting equipment (cycle 50-120 times/minute).
• Household Appliances: For air conditioner outdoor unit fans (blade diameter 400-600mm) at a speed of 1200-1800 rpm, the bearing operation noise is ≤45dB (A-weighted); for washing machine motors (power 180-300W) under dehydration conditions, the instantaneous radial load can reach 1.2 times the rated dynamic load, still maintaining stable operation.
• Construction Machinery: When used at the drive shaft end of small hydraulic pumps (working pressure 8-16MPa), this bearing can withstand temperature fluctuations from -30°C to 100°C; for auxiliary components of steering mechanisms, within the steering angle range of ±30°, the bearing friction torque variation is ≤5%.

🔍 Impact of Materials and Processes on Performance

• Rolling Element Material: Using GCr15SiMn high-carbon chromium bearing steel, after quenching (hardness HRC60-64) and tempering treatment, the contact fatigue life L10 can reach more than 1200 hours, which is 30% higher than ordinary bearing steel.
• Raceway Machining Accuracy: The inner ring raceway roundness is ≤3μm, and the surface roughness Ra is ≤0.4μm, ensuring stable movement trajectory of the rolling elements and reducing vibration acceleration (≤1.5mm/s²).
• Grease Selection: Lithium-based grease (NLGI Grade 2) with a dropping point ≥180°C is recommended, which can reduce grease loss rate under medium and high-speed working conditions and extend the relubrication cycle to 2000 hours.