The precision of the non-standard precision parts processing described here must be strictly in accordance with another plus drawings for processing, processing size in the error tolerance range are qualified parts, so the requirements of processing precision parts is strictly in accordance with the theoretical size for processing.
For the processing of precision parts is mainly the size of the requirements, such as the diameter of the cylinder is how much, there are strict requirements, positive and negative error within the specified requirements to be qualified parts, otherwise are not qualified parts; length, width and height also have specific strict requirements, positive and negative error is also specified, such as an embedded cylinder, if the diameter is too large, more than the error tolerance range, it will cause the insertion of the situation, if the actual diameter is too small, more than the error tolerance range, it will not be inserted. If the actual diameter is too small, more than the lower limit of the negative error allowed, it will cause the insertion of too loose, not solid problems occur.
These are substandard products, is to be scrapped or re-processed, which will certainly cause an increase in costs. Therefore, it is very important to ensure the accuracy of non-standard precision parts processing.