يوم: 07/10/2026

Specific Manifestations of Granite Platform Wear Resistance I. Inherent Wear Resistance of the MaterialHigh Mohs HardnessHigh-quality precision granite (Jinan Green / Zhangqiu Black) has a Mohs hardness of 6–7, higher than cast iron, ordinary steel, aluminum, and Invar.Cast iron hardness is about 3–4 HRC, and steel is 5–6 HRC;Probes, steel fixtures, and workpieces can be…

Core key advantages of granite as a CMM platform base: I. Excellent thermal stability, suppressing dimensional drift caused by temperature changesThe linear thermal expansion coefficient is stable (4.5~6×10⁻⁶/℃), far lower than steel, cast iron, and aluminum alloys. The deformation caused by small ambient temperature fluctuations is extremely minimal, reducing the pressure of temperature compensation for…