What is the purpose of set on a hacksaw blade?

What is the purpose of set on a hacksaw blade?

• A. to prevent binding in the kerf
• B. to mark the cut line
• C. to speed up cutting
• D. to widen the kerf

Answer: (A)

Setting the teeth on a hacksaw blade creates an alternating left-right pattern so the kerf becomes wider than the blade itself. This wider kerf prevents the blade from binding or pinching as it cuts, because there’s extra space for the material and chips to move away from the blade. That free movement helps the blade track smoothly and keeps the cut straight. Other options aren’t the primary purpose: marking the line is done with a guide or marker, not the tooth set; speeding up the cut isn’t achieved by how the teeth are bent (it's more about feed rate and tooth count); and while the kerf is indeed wider due to the set, the fundamental reason for setting the teeth is to prevent binding, not to widen the kerf as a goal in itself.

Setting the teeth on a hacksaw blade creates an alternating left-right pattern so the kerf becomes wider than the blade itself. This wider kerf prevents the blade from binding or pinching as it cuts, because there’s extra space for the material and chips to move away from the blade. That free movement helps the blade track smoothly and keeps the cut straight.

Other options aren’t the primary purpose: marking the line is done with a guide or marker, not the tooth set; speeding up the cut isn’t achieved by how the teeth are bent (it's more about feed rate and tooth count); and while the kerf is indeed wider due to the set, the fundamental reason for setting the teeth is to prevent binding, not to widen the kerf as a goal in itself.