Machining Fundamentals 168
Chapter Review
Summary
• Reciprocating power hacksaws, power band
saws, and circular metal-cutting saws are the
principal types of saws used in machining
operations.
• Power band saws offer many advantages over
other metal-cutting saws.
• Proper blade tension is important for both power
hacksaws and band saws.
• Follow the three-tooth rule for the best cutting
action.
• Select the correct feed pressure, tooth set, and
blade pattern to ensure effi cient and safe cutting.
• Abrasive cutoff saws, cold circular saws, and
frictions saws are the three classifi cations 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 ______ type saw has a back-and-forth
cutting action.
3. The power hacksaw only cuts on the ______
stroke.
4. When using a power sawing machine, with
what materials should you not use 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. ______ teeth per inch for cutting large sections
or readily machined materials.
8. ______ teeth per inch for cutting harder alloys
and miscellaneous cutting.
9. ______ teeth per inch for cutting on the majority
of light-duty machines, where work is limited
to small sections and moderate to light feed
pressures.
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 sawing
machine offer over other types of power saws?
13. Band saw blades are made with two types of
teeth. List them.
For questions 14–16, give the tooth pattern best suited
for cutting the given materials.
14. The ______ tooth patten 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 also recommended
for most nonferrous metallic materials.
17. List the three types of circular metal-cutting
saws.
18. List fi ve safety precautions to be observed
when operating a power saw.