In order to process a qualified part, the thickness of the layer of metal that must be cut from the blank is called the machining allowance. The machining allowance can be further divided into process margin and total margin. The thickness of the layer of metal that needs to be removed in a certain process is called the processing allowance of the process. The total amount that needs to be cut off from the blank to the finished product is called the total remaining amount, which is equal to the sum of the residuals of the respective surfaces of the corresponding surface. The purpose of leaving the machining allowance on the workpiece is to remove the machining error and surface defects left by the previous process, such as the chill layer on the surface of the casting, the pores, the sand layer, the scale on the surface of the forging, the decarburization layer, and the surface. Crack, internal stress layer after cutting, surface roughness, etc. Thereby improving the accuracy and surface roughness of the workpiece. The size of the machining allowance has a great influence on the processing quality and production efficiency. Excessive machining allowance not only increases the labor of machining, reduces productivity, but also increases material, tool and power consumption, and increases processing costs. If the machining allowance is too small, it will not eliminate the various defects and errors of the previous process, and it will not compensate for the clamping error during the processing of this process, resulting in waste. The principle of selection is to make the margin as small as possible under the premise of ensuring quality. In general, the more finished, the smaller the process margin. We are engaged in medium and high-end LED decorative lighting with a whole set of design and manufacture of lamps and lanterns, development of control system and engineering supporting service. Our company is devoted to provide customers with LED application products, which is energy-saving with high efficiency, stable of quality and innovative technologically. We wholeheartedly develop a world's most competitive enterprise with professionally high quality LED lighting and contribute to energy saving and emission reduction of humanity and the great cause of increase in green earth! Our LED series products can be used extensively in different lighting occasion such as bridge building elevation profile, light-projection, floodlighting, roadway lighting, tunnel lighting, square lighting, waterscape lighting, supplementary lighting for monitoring facility, vegetative lighting, household lighting, commercial lighting, leisure entertainment spots, outdoor advertising; we will market more and better new LED lighting products with higher efficiency and energy conservation in the future. Synno has got through ISO9001 quality system certification of SGS of Switzerland, CE certification of European Union, GS certification, ROHS certification and relevant domestic LED lamps and lanterns certification; we have brought our competitive products with reliable performance to every corner of the world, at present 60% of our products have exported to about 30 countries and regions. With the concept of quality first, credit first, service first, we sincerely wish to have the chance to build friendly strategic partnership with wide customers and friends. Synno expects to make acquaintance with you, know you and create a beautiful future with both efforts! Led Spike Light,Led Spike Garden Lights,Outdoor Led Spike Light,Led Garden Spike Lights,Led Spike Spot Light Jiangmen Synno Lighting Co., Ltd. , https://www.synnoled.com