Technical requirements for precision machining parts
1. Precision Machining Shaft Parts 1) Dimensional accuracy, the journal is the main surface of shaft parts, which affects the rotation accuracy and the working state of the shaft. The diameter accuracy of the journal is usually IT6 ~ 9 according to its use requirements, and the precision journal can reach IT5. 2) Geometric accuracy, journal geometric accuracy (roundness, cylindricity), generally should be limited to the diameter tolerance point range. When the accuracy of a geometric shape is required to be higher, the allowable tolerance can be specified on the part drawing separately. 3) In The machining position, the accuracy mainly refers to the coaxiality of the matching journal of the assembly transmission parts relative to the supporting journal of the assembly bearing, which is expressed by the radial circular runout of the matching journal to the supporting journal; According to the use requirements, the high precision axis is 0.001 ~ 0.005mm , and the general p...