This is the Grade 12.9 Steel build of Rod End Bearing — ISO / DIN (Series 106) to ISO / DIN. We cover where the grade earns its cost premium, how it holds up in service, and the sizes stocked — so you can spec it without cross-checking three datasheets.
Why Choose Grade 12.9 Steel for Rod End Bearing — ISO / DIN (Series 106)
The highest common strength class, for high-load machine assembly. For rod end bearing — iso / din (series 106), 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 |
Corrosion Behavior in Service
Carbon and alloy steel rod end bearing — iso / din (series 106) require a coating for corrosion protection. Zinc plating (with or without passivation) is the most common; hot-dip galvanizing is used for outdoor structural service; black-oxide is mainly a tarnish-prevention finish for tool-room use.
Galvanic & Galling Considerations
For rod end bearing — iso / din (series 106) 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.
Sizes of Rod End Bearing — ISO / DIN (Series 106) 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 |