Feeds and Speeds Explained for Small CNC Machines
Small CNC machines are capable of extremely precise work, but results depend heavily on proper feeds and speeds. Many beginners focus on the machine or tooling first, yet cutting parameters often determine whether a project runs smoothly or fails with chatter, tool wear, or poor surface finish. Understanding how feeds and speeds work helps machinists make better adjustments, extend tool life, and improve overall machining accuracy. What Feeds and Speeds Actually Mean Feeds and speeds describe how fast the cutting tool rotates and how quickly it moves through material. Spindle speed refers to how fast the tool spins, measured in revolutions per minute. Feed rate describes how quickly the tool advances into the workpiece. Chip load represents the thickness of material each cutting edge removes during rotation. When these three factors work together correctly, cutting becomes stable and predictable. When they are incorrect, the tool may rub instead of cut, overheat, or produce rough...