🔍 Key Concepts

• Direction of cutting force when using a hand hacksaw • How teeth orientation affects cutting efficiency • The difference between the forward stroke and the return stroke when sawing

💭 Think About

• When you use a hand hacksaw, during which part of the motion (forward or backward) do you naturally apply the most pressure? • How does the direction of the teeth help the blade bite into the metal during the stroke where you apply pressure? • What would likely happen to the quality and ease of the cut if the teeth faced the handle instead?

✅ Before You Answer

• Identify on which stroke the effective cutting is intended to occur • Confirm which stroke (forward or backward) allows you to apply greater, more controlled pressure • Consider whether overheating, cutting fluid direction, or blade breakage are the primary design reasons for tooth orientation