High-speed spindle motors, regardless of light metal machining or heavy metal machining, are selected based on the material being machined. The reason for choosing 24000~6000 rpm to process high-density materials is because the material density is high and the hardness is high, and the low-speed processing will cause the burrs and the surface is not smooth. The reason for choosing 3000~24000 rpm to process low-density materials is because high speed can cause cracking of low-density materials. So when choosing a high-speed spindle, the first choice is its speed.
Choosing the right spindle is especially important for machining. If you need to choose a spindle for the engraving machine, I have the following products from ATC-Spindle.com to recommend to you: