General Machine Twin Shaft Mixers with high reliability and efficiency as well as low maintenance and operating costs and more advantageous than other mixers. Twin Shaft mixer provides a short period of time to a maximum homogeneity of mixing. In minimum time it is guaranty, in the low water-cement ratio and the mixing complete of cement so as to make contact with aggregate. This situation increases the plant productivity significantly. When Twin shaft shafts synchronized running horizontally, the material in the mixer is mixed the same time with cement under its own weight. Our Twin Shaft Mixer has equipped with an automatic lubrication system.