Grade 12.9 Steel Rod End Bearing — ISO / DIN (Series 107) pairs the standard ISO / DIN with a Grade 12.9 Steel base material. The sections below cover why engineers select this grade for rod end bearing — iso / din (series 107), its corrosion and temperature behavior, and the sizes available.
Why Choose Grade 12.9 Steel for Rod End Bearing — ISO / DIN (Series 107)
The highest common strength class, for high-load machine assembly. For rod end bearing — iso / din (series 107), this matters when requires plating or black-oxide protection is the primary requirement.
Mechanical & Physical Properties
| Grade designation | class 12.9 |
|---|---|
| Magnetic response | Magnetic |
| Service temperature | up to approx. +300 °C |
| Corrosion characteristic | Requires plating or black-oxide protection |
Galvanic & Galling Considerations
For rod end bearing — iso / din (series 107) in steel, the dominant compatibility issue is hydrogen embrittlement at high property classes (10.9 and above) when electroplated. Plating must be followed by an appropriate baking treatment, or a non-electroplated finish (mechanical zinc, zinc flake) should be substituted.
Comparable Grades
For Rod End Bearing — ISO / DIN (Series 107), class 8.8 is the comparable strength step. Move up when the joint preload approaches the proof load of the current class; move down when the joint is over-specified. For corrosion-critical service, switch to stainless A2 or A4.
Sizes of Rod End Bearing — ISO / DIN (Series 107) Available in Grade 12.9 Steel
| Bore d (mm) | Thread size | Pitch (mm) | Total length (mm) | Hex width (mm) | Static load Cor (kN) | Reference standard |
|---|---|---|---|---|---|---|
| 5 | M5 | 0.8 | 40 | 8 | 2.2 | DIN ISO 12240 / GB/T 9163 |
| 6 | M6 | 1.0 | 46 | 10 | 3.0 | DIN ISO 12240 / GB/T 9163 |
| 8 | M8 | 1.25 | 57 | 12 | 5.0 | DIN ISO 12240 / GB/T 9163 |
| 10 | M10 | 1.5 | 71 | 14 | 8.0 | DIN ISO 12240 / GB/T 9163 |
| 12 | M12 | 1.75 | 84 | 17 | 12.0 | DIN ISO 12240 / GB/T 9163 |
| 16 | M16 | 2.0 | 105 | 22 | 21.0 | DIN ISO 12240 / GB/T 9163 |
| 20 | M20 | 2.5 | 131 | 27 | 33.0 | DIN ISO 12240 / GB/T 9163 |
| 25 | M24 | 3.0 | 160 | 32 | 52.0 | DIN ISO 12240 / GB/T 9163 |