A grinder is provided. The grinder includes a gearing, a driving motor, and a grinding apparatus. The gearing includes a driving module. The driving motor and the grinding apparatus are disposed on the gearing. The grinding apparatus includes a rotating pot, a central axle, and two grinding wheels. The central axle is disposed on the center of the rotating pot. The two grinding wheels are coupled with the central axle. The two grinding wheels with respect to the central axis are to each other. The driving module is connected to the driving motor and the grinding apparatus. The driving motor is configured to use the driving module to drive the grinding apparatus in order to spin the rotating pot.本發明之目的在於提供一種精磨機,精磨機包括一傳動裝置、一驅動馬達、及一研磨裝置。傳動裝置包括一傳動模組,驅動馬達及研磨裝置皆設置在該傳動裝置上。此外,研磨裝置包括一旋轉鍋、一中心軸、及二個精磨滾輪。中心軸位於旋轉鍋的中央處,二個精磨滾輪是連接於中心軸上,且二個精磨滾輪相對於中心軸呈一對稱狀。其中,傳動模組連結驅動馬達及研磨裝置,而驅動馬達藉由傳動模組驅動研磨裝置,以使旋轉鍋進行自轉。2‧‧‧精磨機21‧‧‧傳動裝置210‧‧‧傳動模組210A‧‧‧大齒輪210B‧‧‧小齒輪22‧‧‧驅動馬達23‧‧‧研磨裝置232‧‧‧中心軸233‧‧‧精磨滾輪
