(1) The positioning of the specimen The specimen should be located in the middle of the X stroke, and placed along the Y and Z axes at an appropriate position suitable for the positioning of the specimen and fixture and the length of the tool.When there are special requirements for the positioning of the specimen, it should be specified in the agreement between the manufacturer and the user　　　　

(2) The fixed specimen of the specimen should be easily installed on a special fixture to achieve the maximum stability of the tool and fixture.The mounting surface of the fixture and specimen should be straight.The parallelism between the mounting surface of the specimen and the clamping surface of the fixture should be checked.A suitable clamping method should be used so that the tool can penetrate and machine the full length of the center hole.It is recommended to use countersunk screws to fix the specimen to avoid interference between the tool and the screw, and other equivalent methods can also be used.The total height of the specimen depends on the fixing method selected.　　

(3) The material, tool type and cutting parameters of the specimen The material, cutting tool and cutting parameters of the specimen are selected in accordance with the agreement between the manufacturer and the user, and should be recorded. The recommended cutting parameters are as follows：　　　　

1. Cutting speed: cast iron parts are about 50m/min; aluminum parts are about 300m/min.　　　　

2. Feed volume: about (0.05~0.10)mm/tooth.　　　　

3. Cutting depth: The radial cutting depth of all milling processes should be 0.2mm.

(4) The size of the specimen. If the specimen is cut several times, the dimensions are reduced and the aperture is increased. When used for acceptance and inspection, it is recommended to choose the Z-shaped contour machining specimen. The size is consistent with that specified in this standard, so as to truthfully reflect the cutting accuracy of the machine tool.The specimen can be used repeatedly in the cutting test, and its specifications should be kept within 10% of the characteristic size given in this standard.When the specimen is used again, a thin-layer cutting should be performed before a new fine-cutting test to clean up all surfaces.