Lesson 1 - Lathes and Attachments
Topics:
Engine lathes; Lathe size, capacity, and parts; Holding work; Steady and follower rest; Preparing for lathe operation; Safety
Learning Objectives:
– Explain the function of each of the following lathe parts: lathe bed, ways, headstock, tailstock, carriage, compound rest, and spindle.– Name the two dimensions usually used to describe lathe capacity.
– List and describe several methods of holding work in a lathe.
– Explain the function of a steady rest and follower rest.
Lesson 2 - Basic Lathe Operations
Topics:
Preparing and centering the stock; Aligning and using rests; Cutting speed and feed; Turning operations; Cutting fluids and coolants
Learning Objectives:
– Describe the factors to consider when selecting and preparing a piece of stock for a lathe job.– Explain how to mount eccentric or irregularly shaped workpieces.
– Define the terms cutting speed and feed rate and list factors that affect each.
– Name two factors that affect the smoothness of a finishing operation.
– Explain the function of cutting fluid in lathe work.
Lesson 3 - Drilling and Boring
Topics:
Drills and drill presses; Drill numbering and sizing; Setting up work; Speed and feed; Drilling compounds; Boring; Safety
Learning Objectives:
– Identify the main parts of a twist drill.– Explain the step-by-step procedure for drilling a hole.
– Demonstrate how to convert speed in surface feet per minute to inches per minute.
– Describe safety precautions to observe when working with a drill press.
– Describe the boring procedure and tell when it is used
Lesson 4 - Reaming
Topics:
Carbide-tipped reamers; Selection; Reaming speeds and feeds; Cutting fluids; Chatter; Troubleshooting; Counterboring; Spotfacing
Learning Objectives:
– Identify the main parts of a reamer– Tell what reaming method is best to use when a very accurate hole is required
– Describe the benefits and uses of the following reamers: shell, hand, adjustable, expansion, taper, high speed steel, and carbide tipped
– Explain how to remove burrs from the cutting edges or teeth of a reamer
– Define counterboring, countersinking, and spotfacing
Lesson 5 - Threads and Threading
Topics:
Common thread series; Thread ID; Tapping; Tap sets; Drilling a hole to be tapped; Tapping pipe threads; Threading with dies; Measuring threads
Learning Objectives:
– Describe and state the uses of the following threads: National, square, Acme, and Buttress.– Explain how the sizing of pipe threads differs from the sizing of other threads.
– Explain when to use each of the following taps: plug, taper, bottoming, spiral-pointed, spiral-fluted, and fluteless.
– Tell why cutting fields are used in tapping operations.
– Explain how to deal with long chips when tapping.
