There are four factors to describe the working relationship of basic tools in Guangdong machining plant: tool geometry, cutting speed and cutting depth. The cutting tools must be made of suitable materials; It must have certain strength, roughness, hardness and fatigue resistance. Tool geometry is described by face and angle. Guangdong machining factory is correct for every cutting operation. Cutting speed refers to the speed of the cutting edge passing through the working face, which is expressed in feet per minute. For machining efficiency, the cutting speed must have an appropriate scale relative to the special work combination. Generally speaking, the harder the workpiece is, the lower the speed is. Feed is the rate at which the tool enters the workpiece. When the cutting tool or workpiece moves back and forth in Guangdong machining plant, the unit of feed is inch. Generally speaking, in other similar cases, the feed is inversely proportional to the cutting speed. Cutting speed is expressed in inches, which is the distance of the tool into the workpiece. It refers to the width of the chip in turning or the thickness of the chip in linear cutting. The cutting depth of rough machining is larger than that of finish machining