SDent Dental Lab Lingual internal Grinder Arch Trimmer Plaster Models Grinding Machine Plaster Model Milling Machine. Features: 1. The Model timmer Milling Machine is a necessary equipment for trimming the sides of plaster models. 2. It is a new kind of model trimmer and it don’t need connect water, can be connect to vacuum cleaner. Specifications Voltage: 110v or 220v Power: 150w Speed: 5500 rpm Tungsten Steel drill : D12×H30mm Weight: 5KG Content: 1x Main unit 1x Tungsten Steel drill.