NSK 6211ZZ, 6212ZZ, and 6213ZZ are deep groove ball bearings engineered for high-speed, high-load applications in power generation equipment. Below are critical parameters:
| Modelo | Diâmetro interior (mm) | Diâmetro exterior (mm) | Largura (mm) | Dynamic Load (Cr, N) | Static Load (Cor, N) | Max Speed (ZZ Shield, rpm) |
|---|---|---|---|---|---|---|
| 6211ZZ | 55 | 100 | 21 | 47,500 | 32,000 | 5,300 |
| 6212ZZ | 60 | 110 | 22 | 52,500 | 36,000 | 5,600 |
| 6213ZZ | 65 | 120 | 23 | 57,500 | 40,000 | 5,300 |
Key advantages: Double-shielded (ZZ) design prevents contamination, C3 internal clearance for thermal expansion tolerance, and low-noise operation [3][5].
These bearings are deployed in:
A Chinese plant replaced outdated bearings with NSK 6212ZZ in 12 x 30 MW Francis turbines, achieving:
| Fator | 6211ZZ | 6212ZZ | 6213ZZ |
|---|---|---|---|
| Capacidade de carga radial | Moderate (≤45 kN) | High (≤52 kN) | Heavy-duty (≤57 kN) |
| Certificação | ISO 9001, API 610 (for oil/gas auxiliaries) | ||
Supplier vetting: Verify NSK授权 distributor status, 24/7 technical support SLA, and local inventory [1][5].
Contacte os nossos engenheiros de rolamentos para uma análise da aplicação.
[3] NSK 6213ZZ轴承尺寸规格参数报价
[5] 进口NSK轴承6208-6215ZZ高速静音
[1] 阿里巴巴NSK 6212ZZ轴承批发信息
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