What is the main advantage of using higher spindle speeds in CNC machining?

The main advantage of using higher spindle speeds in CNC machining is that it increases the material removal rate. When the spindle speed is increased, the cutting tool engages the workpiece more frequently, allowing for more cutting edges to impact the material in a given period. This can result in more efficient machining by removing large volumes of material quickly, which is particularly beneficial when dealing with softer materials that can be cut at faster rates without sacrificing surface finish. Higher spindle speeds can also enhance chip removal, reducing the likelihood of build-up and improving tool life.

While other factors such as power consumption, programming complexity, and operational costs can be affected by spindle speed, the primary purpose and direct benefit of increasing spindle speed is the enhanced ability to efficiently remove material during the machining process.