1.Tolerance requirements
(1) The unmarked shape tolerance shall meet the requirements of GB1184-80.
(2) The allowable deviation of the unmarked length dimension is ±0.5mm.
(3) The tolerance zone of the casting is symmetrical to the basic size configuration of the blank casting.
2. Requirements for cutting workpieces
(1) Parts should be inspected and accepted according to the process, and only after passing the inspection of the previous process can they be transferred to the next process.
(2) The processed parts are not allowed to have burrs.
(3) The finished parts should not be placed directly on the ground, and necessary support and protection measures should be taken. The machined surface is not allowed to have rust, bumps, scratches and other defects that affect performance, life or appearance.
(4) There should be no peeling after rolling on the surface of rolling finishing.
(5) There should be no oxide scale on the surface of the parts after heat treatment in the final process. Finished mating surfaces and tooth surfaces should not be annealed
(6) The surface of the processed thread is not allowed to have defects such as black skin, bumps, random buckles and burrs.