The QGZ-100B cutting machine can cut circular workpieces with a diameter of up to 100mm, as well as rectangular specimens with a height of 100mm and a depth of 200mm. It cools the specimen through an automatic circulation cooling system to prevent overheating and tissue damage during cutting. The machine also allows for setting different cutting speeds based on the type of specimen, thereby improving the quality of the cut specimens. It features both manual and automatic cutting modes. The large cutting chamber is user-friendly, making it one of the sample preparation equipment for metallographic testing in colleges and factories.