618 for shaping series high-precision surface grinder manual its advantages: low-noise, low vibration, high precision and high steel and low temperature. Spindle motor with direct-type design, no power loss, cutting power, vibration small, excellent cutting surface brightness, high precision system used on high-precision double row ball (column)-type front bearings, one-on-one with size are installed. Adjust the preloading of the best value to meet the high precision and high rigidity, long-life requirements. Spindle material the use of high-strength Cr-Mo alloy system live. After repeatedly modulation with enhanced handling and high precision, strong endurance. Precision Balancing the whole (including the motor rotor), to ensure that the best state performance of teams, the best available photometric precision and grinding