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| Type | High-speed tool / bearing steel ball | Model | High-speed molybdenum alloy tool steel |
| Params | Per aerospace specification; typical 3 mm – 50 mm; HRC 62–66; high hot hardness | Material | AISI M50 / UNS T11350 (AMS 6490) |
| Applicable Industry | Aerospace engine main-shaft bearings, high-speed turbomachinery, high-temperature bearing applications | ||
Retains hardness and dimensional stability at elevated temperatures; the established aerospace-grade bearing steel for high-speed, high-temperature engine and turbine duty.

M50 Steel Ball
