Unlike routers, you don't use spindles by hand or on a CNC machine. Because of this, they don't typically have a plunge base on them or a dust extractor. Instead, they normally consist of the spindle itself and the motor. Spindles generally have one of two types of motors: an electric or air-powered motor.

Remember, selecting the right CNC spindle involves considering speed requirements, material compatibility, and precision needs. High-speed spindles, for example, excel in tasks like intricate engravings or drilling small holes in aluminum or wood.

For machining aluminum, plastic, wood or laminate with cutters up to 5mm the spindle (0.8kW 24,000 rpm) is sufficient, and accordingly cutters up to 8mm - 1kW spindle, cutters up to 12mm - 3.3kW spindle, cutters up to 16mm - 5.6kW spindle.