... 4.8 kW 4.ISO9001 NGM - 4.8 diesel rail grinding machine:1:patent2:ISO90013:Technical Applicable scopeNGM - 4.8 type internal ... combustion rail grinding machine is suitable for 43 kg/m - 75 kg/m rail ... φ 553, spindle revolution: 4100 r/min4, grinding head Angle 90 °5, grinding head stroke 90 mm6, the machine quality: 120 kg7, outlook size: 1650 ...