627 ZZ long life bearings for fan motors
The 627 ZZ is a high-performance, double-shielded deep groove ball bearing specifically engineered for fan motor applications. With optimized 7×22×7 mm (ID×OD×W) dimensions, this bearing delivers ultra-long service life (50,000+ hours) under continuous operation in HVAC systems, cooling fans, and industrial blowers.
Featuring dual metal shields (ZZ) for superior dust protection and ABEC-3 precision, it ensures low vibration and quiet operation – critical for noise-sensitive environments. The high-grade chrome steel construction with special C3 internal clearance accommodates thermal expansion in high-temperature fan applications.
Specifications & Dimensions
| Parameter | Specification |
|---|---|
| Model | 627 ZZ |
| Type | Deep Groove Ball Bearing |
| Inner Diameter (ID) | 7 mm |
| Outer Diameter (OD) | 22 mm |
| Width (W) | 7 mm |
| Material | Chrome Steel (GCr15) / Optional Stainless Steel |
| Shield Type | Double Metal Shields (ZZ) |
| Clearance | C3 (Increased for thermal expansion) |
| Precision Grade | ABEC-3 |
| Dynamic Load | 3.8 kN |
| Static Load | 1.8 kN |
| Max Speed | 18,000 RPM (Grease), 25,000 RPM (Oil) |
| Temperature Range | -30°C to +150°C |
| Lubrication | High-Temp Grease (Standard) / Synthetic Oil (Optional) |
| L10 Life Rating | 50,000+ hours @ 3,000 RPM |
Key Features
✔ Extended Service Life – 50,000+ hour L10 rating at typical fan speeds
✔ Thermal Optimized – C3 clearance prevents binding in heat cycling
✔ Dual Protection – ZZ shields block dust while retaining lubrication
✔ Quiet Operation – Precision-ground races reduce vibration (tested <20 dB)
✔ Versatile Mounting – Fits standard 40mm-120mm fan motors
Typical Applications
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