SFM in Machining: What It Is and How to Calculate It
SFM means “Surface Feet per Minute.” It measures how fast the cutting edge of the tool moves across the material surface. This speed depends on how fast the tool spins and how big it is.
Think of it this way: if a cutting tool spins too slowly, the cut may not be clean. If it turns too fast, the tool may overheat or wear out quickly. SFM gives a number to help find the right speed.