MFG 252 - Engine Lathe Theory II

1. Demonstrate an understanding of work holding devices
   1. Explain the uses and care of independent and universal chucks
   2. Explain the limitations and advantages of a collet
   3. Describe a collet setup
   4. Explain the uses of, and differences between, drive and face plates
2. Demonstrate knowledge of center drilling in a lathe
   1. Determine proper speed and feed for a given material and size
   2. Name two reasons for center drilling a work piece in the lathe
   3. Explain two causes of center drill breakage
   4. Describe what happens when you drill too deeply with a center drill
3. Demonstrate an understanding of thread cutting on a lathe
   1. Describe the several 60-degree thread forms, noting their similarities and differences
   2. Calculate thread depth, in feeds, and minor diameters of threads
   3. Describe how the number of threads per inch can be checked
   4. Determine how fast a spindle should be turning for threading
   5. Explain the procedure for cutting left-hand threads
   6. Explain the procedure for cutting internal threads
   7. Explain the procedure for cutting acme threads
   8. Describe what procedure is needed when you are ready to finish the thread if for some reason it becomes necessary to temporarily remove the tool or the entire threading setup before a thread is completed
4. Demonstrate knowledge of work support devices
   1. Identify the parts of a steady rest
   2. Explain the correct use of the follower rest
   3. Point out when a steady rest should be used
   4. Describe how a steady rest is set up on a straight finished shaft when it has centers in the ends
   5. Explain how a steady rest can be used on irregular surfaces such as square or hex stock