There are several factors to consider when choosing CNC rotary table tools:

1. Processing material: Select the corresponding tool material and tool type according to the hardness, strength and cutting performance of the processing material.

2. Cutting type: Select the appropriate cutting type according to processing requirements, such as milling, drilling, boring, etc., and then select the corresponding tool.

3. Cutting parameters: According to the processing conditions and requirements, determine the cutting speed, feed speed, cutting depth and other parameters, and then select the number of cutting edges, cutting edge diameter and attack angle of the tool.

4. Wear resistance of the tool: According to the material, size and shape of the workpiece, select a tool with good wear resistance to improve processing efficiency and tool life.

5. Tool stability: Choose tools with strength and rigidity to ensure a stable cutting process and machining accuracy.

6. The cutting tool geometry of the tool: Select a tool that suits the processing requirements, such as edge angle, top angle, cutting edge shape, etc.

7. Economy and substitutability: Consider the price, life and substitutability of the tool, and choose a tool with a higher cost performance.

In short, the selection of CNC rotary table tools requires comprehensive consideration of factors such as processing materials, cutting type, cutting parameters, wear resistance, stability, tool geometry and economy.