1, Thread milling method

1. The cutting tools are generally made of hard alloy materials, with fast speed, high precision in milling threads, and high processing efficiency;
2. With the same pitch, both left-hand and right-hand threads can use a single tool, reducing the cost of the tool;
3. Thread milling method is particularly suitable for thread processing of difficult to machine materials such as stainless steel and copper, which is easy to remove chips and cool, ensuring the quality and safety of processing;
4. Without tool front guidance, it is more convenient to process blind holes with shorter threaded bottom holes or holes without tool withdrawal slots.


1. After machining the threaded bottom hole, use a drill bit to machine small diameter holes, and use boring to machine larger holes to ensure the accuracy of the threaded bottom hole;
2. The tool generally adopts a 1/2 circle arc trajectory for cutting in and out to ensure the shape of the thread, and the tool radius compensation value should be entered at this time.
2, CNC machining center tap machining method




3, Picking buckle processing method

1. There should be a delay time when starting the spindle to ensure that it reaches the rated speed;
2. The grinding of hand ground thread cutting tools cannot be symmetrical, and reverse retraction cannot be used. Instead, the tool should be oriented radially with the spindle and then retracted;
3. The tool holder must be precise and consistent with the position of the tool slot, otherwise multiple tool holders cannot be used for processing, resulting in disorderly locking;
4. When picking buckles, be careful not to cut them all at once, even for very thin buckles, otherwise it will cause tooth loss and poor surface roughness. Multiple cuts should be used for picking buckles;
5. The pick buckle machining method is only applicable to single piece, small batch, special pitch threads, and situations without corresponding cutting tools, resulting in low machining efficiency.