1. Steel welded body, tempering treatment, high rigidity, accuracy and stability; 2. The crankshaft undergoes grinding treatment after high frequency quenching, beautiful outlook; 3. Hexahedral guide rails of extra length in square shape marked with high precision; 4. Combined type pneumatic friction clutch-brake, ensuring steady engagement and low in noise level; 5. Hydraulic overload protection for JH21, rigid protective device for JF21 to prevent damage due to overload in operation; 6. PLC electric control system is safe and reliable; 7. Pneumatic balance device for slide block to ensure the stability and precision of the machine tool; 8. Automatic thick oil lubrication for specific points and in specific volumes regularly to ensure sufficient, uniform and reliable lubrication, electrical die adjustment with digital display for 60Ton and 60Ton plus;
