NGM-6.0 Rail Profile Grinder This machine is powered by the M165 two-stroke petrol engine imported from Spain. It is a small machine used for forming and grinding the rail head welding joints and surface repairs. It is suitable for rails of 43~75kg/m. The special diaphragm carburetor make sure the engine does not stall after turning 90°, and the output torque is stable without power attenuation, thus ensuring the precision of rail grinding.