A hacksaw is a fine-toothed hand saw that is used by carpenters to cut metal, plastic, and wood. It has a C-shaped frame with a blade that is under tension.
For a standard size hacksaw, blades are available in both 10 inches and 12 inches. The pitch of the teeth on a blade can range from 14 teeth per inch to 32 inch per inch.
A carpenter chooses the type of hacksaw to use based on the thickness of the material that he or she needs to cut. The abbreviation tpi is used for teeth per inch.
Elementary School Connection:
Solve: What are the total number of teeth on a 10-inch blade that has 32 teeth per inch? Explain and show how you found your answer.
Solve: How many more teeth are on a 10-inch blade with 18 teeth per inch than a 12-inch blade with 14 teeth per inch? Explain and show how you found your answer.
Solve: What are the total number of teeth are on a 12-inch blade that has 18 teeth per inch? Explain and show how you found your answer.
Middle School & High School Connection: Learn how to use a hacksaw in this YouTube video!