21307 pherical Roller Bearings
| 21307 pherical Roller Bearings | |||
|---|---|---|---|
| Part Number | 21307 | Weight(Kg) | 0.49 |
| d | 35 | Dynamic Load Co(N) | 68500 |
| D1 | 80 | Static Load Cor(N) | 74200 |
| B | 21 | Grease Speed | 4100 |
| R | 1.5 | Oil Speed | 5400 |
21307 Spherical Roller Bearing | Medium And Heavy Duty Self-Aligning Bearings
The 21307 spherical roller bearing is a versatile double-row self-aligning roller bearing optimized for medium-to-heavy industrial load conditions. As an upgraded model of the 21306 series, it features enlarged roller elements and optimized raceway curvature, delivering boosted load tolerance and structural stability. Its unique spherical self-aligning design actively offsets shaft misalignment, operational deflection and assembly errors, reliably supporting heavy radial loads and stable bidirectional axial loads. Suited for continuous medium-speed cyclic operation, this bearing is a universal core component for general heavy industrial mechanical systems with complex running states.
Conventional Bearing Material Options
21307 bearings adopt multiple industrial standard materials to match diverse working environments, balancing mechanical strength, wear resistance and corrosion durability:
High Carbon Chrome Bearing Steel: The default industrial material for 21307 heavy-duty roller bearings. It features high integral hardness, exceptional compression resistance and strong fatigue resistance under alternating dynamic loads. It maintains stable dimensional precision during long-term continuous operation, offering excellent cost performance and low maintenance frequency for standard heavy industrial applications.
304 Stainless Steel: Provides excellent atmospheric rust prevention and oxidation resistance, adapting to dusty, humid and open workshop environments. It retains steady medium-load performance, serving as a budget-friendly anti-corrosion option for outdoor industrial equipment and light heavy-duty mechanical assemblies.
420 Stainless Steel: Combines high hardness and impact toughness, effectively resisting frequent mechanical vibration and mild chemical corrosion. It avoids structural deformation and surface wear during cyclic operation, ideal for semi-corrosive production lines and general precision heavy machinery.
440C Stainless Steel: Boasts ultra-high wear resistance and structural stability, perfectly suited for damp workshops and moderately corrosive industrial scenarios. It significantly delays bearing aging and precision loss, extending the service life of long-cycle operating automation and processing equipment.
316 Stainless Steel: High-end corrosion-resistant material with outstanding salt spray, acid and alkali resistance. It operates reliably in harsh marine, chemical and high-humidity environments, designed for sanitary, chemical and marine special industrial equipment.
Product Strengths And Industrial Application Scenarios
The 21307 spherical roller bearing features flexible self-aligning performance, upgraded medium-heavy load capacity, vibration resistance and stable medium-speed operation. Customizable material grades enable strong environmental adaptability for dry, humid and corrosive working conditions. Widely used in industrial centrifugal fans, mining transmission equipment, cement machinery, agricultural processing devices, logistics conveyor systems and metallurgical auxiliary equipment, it provides reliable, low-failure and cost-effective load-bearing solutions for continuous-operation heavy-duty industrial mechanical systems.
