Specifying Angular Contact Ball Bearing — ISO / DIN (Series 111) in A2 Stainless Steel pairs the dimensional form of Angular Contact Ball Bearing — ISO / DIN (Series 111) (ISO / DIN) with the engineering properties of A2 Stainless Steel. This page explains when to choose the grade, how it behaves in service, and which grades to compare it against.
Why Choose A2 Stainless Steel for Angular Contact Ball Bearing — ISO / DIN (Series 111)
The most common stainless grade for indoor and general outdoor fasteners. For angular contact ball bearing — iso / din (series 111), 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 |
Galvanic & Galling Considerations
Two important notes for stainless angular contact ball bearing — iso / din (series 111): (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.
Comparable Grades
For Angular Contact Ball Bearing — ISO / DIN (Series 111), the alternative stainless grade is A4 (316). A2 (304) suits general indoor and outdoor service; A4 (316) adds molybdenum for marine and chloride environments. Where higher strength matters more than corrosion, switch to plated alloy-steel class 8.8 or 10.9.
Sizes of Angular Contact Ball Bearing — ISO / DIN (Series 111) Available in A2 Stainless Steel
| Bore d (mm) | Outer diameter D (mm) | Width B (mm) | Contact angle (deg) | Dynamic load C (kN) | Reference standard |
|---|---|---|---|---|---|
| 10 | 30 | 9 | 15 | 5.85 | ISO 76 / GB/T 292 |
| 15 | 35 | 11 | 15 | 8.06 | ISO 76 / GB/T 292 |
| 20 | 47 | 14 | 15 | 12.5 | ISO 76 / GB/T 292 |
| 25 | 52 | 15 | 15 | 14.8 | ISO 76 / GB/T 292 |
| 30 | 62 | 16 | 15 | 20.3 | ISO 76 / GB/T 292 |
| 40 | 80 | 18 | 15 | 32.5 | ISO 76 / GB/T 292 |
| 50 | 90 | 20 | 15 | 37.5 | ISO 76 / GB/T 292 |
| 60 | 110 | 22 | 25 | 55.0 | ISO 76 / GB/T 292 |
| 70 | 125 | 24 | 25 | 70.2 | ISO 76 / GB/T 292 |
| 80 | 140 | 26 | 25 | 82.4 | ISO 76 / GB/T 292 |