CE-6405-SiSi-V

CE-6405-SiSi-V is a high-precision full ceramic bearing featuring Si₃N₄ (silicon nitride) rings and balls with a cage-less (full complement) design. Silicon nitride bearings leverage exceptional strength, thermal shock resistance, and low friction, making them ideal for high-speed, high-load, and extreme-temperature applications. They outperform steel bearings in durability and efficiency, offering superior wear resistance and the ability to operate without lubrication. The cage-less design maximizes the number of rolling elements, providing higher load capacity and eliminating cage-related failures at elevated temperatures. Widely used in aerospace, automotive, and precision machinery, they ensure reliable performance under demanding conditions.

◆ Basic Dimensions and Weight

Model CE-6405-SiSi-V (standard 6405 series). Dimensions in mm, weight in kg.

Mounting dimensions: da min = 32 mm, Da max = 54 mm, ra max = 1.1 mm.
   Reference weight: 0.220 kg (Si₃N₄ full ceramic).

◆ Material and Design

● Rings & Balls – Si₃N₄ (Silicon Nitride) – Advanced ceramic with high fracture toughness, excellent thermal shock resistance, and low density (~3.2 g/cm³). Vickers hardness 1400–1700 HV10, flexural strength ≥800 MPa. Thermal expansion coefficient 3.2×10⁻⁶/K (lower than steel), dielectric strength >15 kV/mm, non-magnetic, non-conductive.

● Cage – V (Cage-Less / Full Complement) – The "V" designation indicates a cage-less design with maximum ball complement. This configuration eliminates cage-related failures at high temperatures, increases load capacity by approximately 20–30% compared to caged designs, and allows operation at temperatures up to 800°C. Suitable for high-temperature applications where polymer or metal cages would degrade.

● Design Features – Standard deep groove geometry suitable for radial and light axial loads. The full complement design provides higher radial load capacity than caged versions. Optimized for high-temperature and high-speed operation with low noise and vibration characteristics.

◆ Core Performance Advantages

● Exceptional Strength & Toughness – Silicon nitride offers superior fracture toughness and impact resistance compared to other ceramics, ensuring durability under shock loads.

● Thermal Shock Resistance – Excellent resistance to rapid temperature changes, ideal for applications with fluctuating thermal conditions.

● Low Friction & High Speed – Very low friction coefficient (0.03–0.08), enabling higher rotational speeds than steel bearings with reduced heat generation.

● Extreme Temperature Range – Operates from -200°C to +800°C (rings/balls). The cage-less design eliminates temperature limitations imposed by cages, making it ideal for ultra-high-temperature environments.

● Corrosion & Wear Resistance – Resists most acids, alkalis, and organic solvents. Outperforms steel in wear resistance, extending service life in abrasive environments.

● Electrical Insulation – Non-conductive and non-magnetic, preventing electrolytic corrosion and arcing damage in electrical equipment.

● Maintenance-Free Operation – Can run dry without lubrication, reducing maintenance costs and contamination risks.

● Higher Load Capacity – The full complement design provides approximately 20–30% higher radial load capacity compared to caged bearings of the same size.

◆ Application Areas

● High-Temperature Processes – Furnace conveyors, kiln car bearings, heat-treatment equipment – operating at temperatures up to 800°C.

● Aerospace – Turbine components, actuators, flight control systems – lightweight, high-temperature stability.

● Automotive – Electric vehicle motors, turbochargers, fuel pumps – high-speed and corrosion-resistant.

● Precision Machinery – High-speed spindles, machine tool bearings – high rigidity and accuracy.

● Semiconductor & Cleanroom – Vacuum robots, wafer handling – particle-free, non-magnetic.

● Chemical Processing – Pumps, agitators, mixers – corrosion resistant to aggressive chemicals.

◆ Technical Data