21308 Spherical Roller Bearings
| 21308 Spherical Roller Bearings | |||
|---|---|---|---|
| Part Number | 21308 | Weight(Kg) | 0.71 |
| d | 40 | Dynamic Load Co(N) | 88000 |
| D1 | 90 | Static Load Cor(N) | 90000 |
| B | 23 | Grease Speed | 3200 |
| R | 1.5 | Oil Speed | 4900 |
21308 Spherical Roller Bearing | High Load High Speed Self-Aligning Bearings
The 21308 spherical roller bearing is a high-performance double-row self-aligning roller bearing in the 21300 series, optimized for high-speed and heavy-load industrial operating scenarios. Upgraded from 21307 models with optimized internal roller arrangement and enlarged load contact area, it delivers enhanced pressure resistance and rotational stability. Featuring a precision spherical raceway structure, this bearing automatically compensates for shaft deflection, installation deviation and equipment vibration. It stably supports heavy radial loads and moderate bidirectional axial loads, adapting to long-term cyclic high-speed operation, making it a key component for high-efficiency heavy industrial mechanical systems.
Conventional 21308 Bearing Material Options
21308 spherical roller bearings are available in multiple industrial-grade materials to adapt to different working conditions, balancing high-speed stability, wear resistance and corrosion resistance:
High Carbon Chrome Bearing Steel: The standard material for 21308 industrial bearings. It features uniform high hardness, excellent anti-fatigue performance and strong compression resistance under high-speed alternating loads. It maintains stable dimensional accuracy during long-duration continuous operation, with low wear rate and high cost performance, suitable for most standard heavy-duty industrial scenarios.
304 Stainless Steel: Offers superior anti-oxidation and rust-proof properties for humid, dusty and open working environments. It retains stable mechanical performance under medium and heavy loads, serving as an economical anti-corrosion solution for outdoor industrial facilities and general light corrosive mechanical equipment.
420 Stainless Steel: Integrates high hardness and mechanical toughness, effectively resisting high-speed friction, frequent vibration and mild chemical erosion. It prevents surface abrasion and structural deformation, ideal for semi-corrosive production lines and continuous operating processing machinery.
440C Stainless Steel: Features ultra-high wear resistance and structural stability, perfectly adapted to damp workshops and moderately corrosive environments. It effectively delays bearing aging and precision attenuation, greatly extending the service life of high-speed automated heavy-duty equipment.
316 Stainless Steel: Premium marine-grade corrosion-resistant material with excellent salt spray, acid and alkali resistance. It operates steadily in harsh chemical, marine and high-humidity environments, specially customized for food sanitary, chemical and marine industrial equipment.
Core Advantages And Industrial Applications
The 21308 spherical roller bearing stands out for its high-speed heavy-load capacity, precise self-aligning function, strong vibration resistance and low-friction stable operation. Diversified material configurations enable flexible adaptation to dry, humid and corrosive complex working conditions. It is widely applied in high-speed industrial fans, mining machinery, cement production equipment, agricultural heavy machinery, metallurgical transmission systems and large conveyor equipment. This bearing provides high-efficiency, low-maintenance and durable load-bearing solutions for continuous running heavy-duty industrial mechanical systems.
