Chip breakers are frequently used with single-point tools.They work by forcing the chips to curl more tightly than they would naturally be inclined to curl, thus causing them to fracture:

Question

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Chip breakers are designed to modify the geometry of the chip flow, causing chips to curl more tightly and break more easily, which helps in managing chip removal and preventing damage to the workpiece or tool.

Chip Breakers Are Frequently Used with Single-Point Tools