In the manual model processing, the spindle should also have a broach system to load and unload tools, which is generally divided into hydraulic, pneumatic and mechanical. Following the traditional manual model machine tool tool loading method, the mechanical type only uses a screw through the spindle to tighten the tool. Its power comes from the broach motor at the tail of the spindle. The pull is torque monitored. When the broach pull reaches the set value, the tool mode will close. Compared with the front tool, there is no need to pull the nail.

而手辦模型機械加工數控機床的液壓與氣壓拉刀機構都比較煩瑣，機械零件加工廠在主軸尾部既要裝拉刀油缸，又要安裝主軸噴霧、噴水、噴氣機構，在設計制造上成本會高出很多。

The hydraulic and pneumatic broaching mechanisms of the machine tool CNC machine tools are rather cumbersome. The mechanical parts processing plant has to install the broach cylinder at the rear of the spindle, and also install the spindle spray, spray and jet mechanism. The cost will be much higher in design and manufacture.
               

手辦模型加工專家指出，對于液壓裝刀，須要配置拉爪，從前到后這個拉桿都是中空的，因為它要考慮主軸內冷的設計。拉爪是4個靠彈簧頂開的爪瓣，靠在斜面上前后移動以達到收緊與張開，從而實現刀具的裝卸。

Manual model processing experts pointed out that for hydraulic loading, it is necessary to configure the claw. The pull rod from the front to the back is hollow, because it needs to consider the design of internal cooling of the spindle. The pulling claws are four claw petals pushed open by springs, which move back and forth on the inclined plane to achieve tightening and opening, so as to realize the loading and unloading of cutting tools.

在手辦模型加工的實際應用中，刀具有時候會松，如果確認刀具拉釘沒有松的話，就是拉爪松了，操作人員可以給它擰緊，但要自制一個小工具。因為拉爪后邊都有一個調整拉爪前后位置的螺帽，它是可以旋緊的，做成一個可以旋緊它的長柄小叉子，這樣問題就解決了。

In the practical application of manual model processing, the cutting tool is sometimes loose. If it is confirmed that the pulling nail of the cutting tool is not loose, the claw is loose. The operator can tighten it, but a small tool should be made by himself. Because there is a nut at the back of the claw to adjust the front and rear position of the claw, it can be tightened to make a long handle fork that can be tightened, so the problem is solved.