In production, it is often difficult to process taper with high precision. It is difficult to process. For example, Morse taper, its taper angle is not the whole degree. To be processed on a lathe, the mantissa can only be estimated by experience. In order to solve this problem, we have developed an aluminum plate (or other soft metal material) on the base of the small carriage of the original lathe, and carved two sub-squares on the aluminum plate, or the original vertical surface when manufacturing the lathe. Make a bevel and engrave the corresponding sub-foot on it. The structure is shown in Figure 1 and Figure 2.
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