Model Y250-1 Single-shaft grinding machine mainly used for grinding, refitting of single unit of optical glass and crystal through handwork. Easy and convenient operation is achieved. Principle shaft has a stepless speed control system, transmission strap, low noise and little vibration. Two sets of D-degree shafts are used for the structure of principle shaft, providing high precision of circumrotate. Elastic cushiony steel is used for the four corners of the machine, adjusting the stability of the equipment. The hollowware is made of stainless steel; the table-board is made of stearic PVC with aluminum slots in the circumambience, making the machine corrosive-resistant and a perfect outlook. Electrical equipment is in front of the table-board, making operation and maintenance easy.