Terms of the Trade: What Is a Hacksaw? Terms of the Trade: What Is a Hacksaw?

When it comes to cutting into materials other than wood, a hacksaw is what you want. With teeth shorter and smaller than a typical saw, the blade is perfect for slicing into pipe or conduit. In fact, the blades are replaceable, and are classified by teeth per inch; a fine class includes 32 teeth per inch (tpi), a medium class 24 tpi and a coarse class of 18 tpi. The less teeth per inch, the rougher the blade edge. However, you can cut faster and more aggressively with a coarse blade. But be careful--because the blade is suspended between a bow frame, the tension needs to be just right or else it won't cut straight.

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