167 Copyright Goodheart-Willcox Co., Inc. Chapter Review Summary • Reciprocating power hacksaws, power band saws, and cir- cular metal-cutting saws are the principal types of saws used in machining operations. • Power hacksaws can have a positive feed or a definite pressure feed. • Power band saws offer greater precision, faster speeds, and less waste than other metal-cutting saws. • Proper blade tension is important for both power hack- saws and band saws. • Follow the three-tooth rule for the best cutting action. • Select the correct feed pressure, tooth set, and blade pat- tern to ensure efficient and safe cutting. • Most sawing problems can be prevented by careful plan- ning and observing a few rules. • Abrasive cutoff saws, cold circular saws, and friction saws are the three classifications of metal-cutting circular saws. • Always follow proper safety procedures when operating a power saw. Review Questions Answer the following questions using the information provided in this chapter. 1. List the three basic types of metal-cutting saws. 2. The ______ saw has a back-and-forth cutting action. 3. The power hacksaw only cuts on the ______ stroke. 4. When using a power sawing machine, which materials do not require coolant? 5. What is the “three-tooth rule” for sawing? 6. List the two principal types of hacksaw blades. For questions 7–9, give the “rule of thumb” for selecting the correct blade. 7. Select ______ teeth per inch for cutting large sections or readily machined materials. 8. Select ______ teeth per inch for cutting harder alloys and miscellaneous cutting. 9. Select ______ teeth per inch for cutting on the majority of light-duty machines, where work is limited to small sections requiring moderate to light feed pressure. 10. List three methods used to put proper tension on a power hacksaw blade. 11. When is a stop gage used? 12. What three advantages does the band saw offer over other types of power saws? 13. Band saw blades are made with three types of teeth. List them. For questions 14–16, give the tooth pattern best suited for cutting the given materials. 14. The ______-tooth pattern is best suited for cutting most ferrous metals. 15. The ______-tooth pattern is preferred for cutting aluminum, magnesium, copper, and soft brass. 16. The ______-tooth pattern is recommended for most nonferrous metallic materials. 17. What is the most common cause of crooked cutting? 18. Name four possible causes of premature wear of saw blade teeth. 19. List the three types of circular metal-cutting saws. 20. List five safety precautions to be observed when operating a power saw.