A2 Stainless Steel Deep Groove Ball Bearing — ISO / DIN (Series 128) pairs the standard ISO / DIN with a A2 Stainless Steel base material. The sections below cover why engineers select this grade for deep groove ball bearing — iso / din (series 128), its corrosion and temperature behavior, and the sizes available.
Why Choose A2 Stainless Steel for Deep Groove Ball Bearing — ISO / DIN (Series 128)
The most common stainless grade for indoor and general outdoor fasteners. For deep groove ball bearing — iso / din (series 128), this matters when good general corrosion resistance is the primary requirement.
Mechanical & Physical Properties
| Grade designation | A2-70 (304) |
|---|---|
| Magnetic response | Largely non-magnetic |
| Service temperature | approx. -200 °C to +400 °C |
| Corrosion characteristic | Good general corrosion resistance |
Corrosion Behavior in Service
A2 (304) gives excellent atmospheric and most-water corrosion resistance and is the most common stainless for Deep Groove Ball Bearing — ISO / DIN (Series 128) in indoor and general outdoor service. In chloride-bearing environments (marine air, road salt, swimming pools) consider stepping up to A4 (316).
Galvanic & Galling Considerations
Two important notes for stainless deep groove ball bearing — iso / din (series 128): (1) stainless can gall on stainless threads under load — use a thread lubricant or anti-galling compound, especially for M6 and below; (2) when joined to aluminum or galvanized steel, stainless can drive galvanic corrosion of the less-noble metal in wet service — isolate with a coating or sleeve where appropriate.
Sizes of Deep Groove Ball Bearing — ISO / DIN (Series 128) Available in A2 Stainless Steel
| Bore d (mm) | Outer diameter D (mm) | Width B (mm) | Dynamic load C (kN) | Limit speed (rpm) | Reference standard |
|---|---|---|---|---|---|
| 10 | 30 | 9 | 5.1 | 32000 | ISO 15 / GB/T 276 |
| 12 | 32 | 10 | 6.95 | 28000 | ISO 15 / GB/T 276 |
| 15 | 35 | 11 | 7.65 | 24000 | ISO 15 / GB/T 276 |
| 17 | 40 | 12 | 9.56 | 22000 | ISO 15 / GB/T 276 |
| 20 | 47 | 14 | 12.7 | 18000 | ISO 15 / GB/T 276 |
| 25 | 52 | 15 | 14.0 | 16000 | ISO 15 / GB/T 276 |
| 30 | 62 | 16 | 19.5 | 13000 | ISO 15 / GB/T 276 |
| 35 | 72 | 17 | 25.5 | 11000 | ISO 15 / GB/T 276 |
| 40 | 80 | 18 | 30.7 | 10000 | ISO 15 / GB/T 276 |
| 45 | 85 | 19 | 33.2 | 9500 | ISO 15 / GB/T 276 |
| 50 | 90 | 20 | 35.1 | 9000 | ISO 15 / GB/T 276 |
| 60 | 110 | 22 | 52.7 | 7500 | ISO 15 / GB/T 276 |