STANDARD COMPETENCIES:

 

 I.      Demonstrate boring on the lathe to an accuracy of .0005 inches.

 II.     Describe and demonstrate methods of measuring inside diameters including inside micrometers, dial and vernier calipers, small hole gages, telescope gages, and plug gages.

 III.    Explain the use of various types of arbors, including the expansion arbor and stub arbor.

 IV.     Demonstrate the use of the expansion arbor.

 V.      Describe the applications for which arbors are used.

 VI.     Explain and demonstrate the sine bar as applied to inspection.

 VII.    Explain and demonstrate the sine bar as applied to lathe taper turning by cutting taper to an accuracy of one minute.

 VIII.   Explain the function of counterbores and countersinks.

 IX.     Demonstrate producing countersinks and counterbores on the lathe.

 X       Explain what constitutes a parallel part.

 XI.     Describe types of parallel turning.

         A.      Straight tuning

         B.      External threads

 XII.    Explain how the following can produce nonparallel parts:

         A.      Tool wear

         B.      Misaligned tail stock position

         C.      Machine leveling

 XIII.   Explain the meaning of swing.

 XIV.    Explain the meaning of length between centers.

 XV.     Demonstrate knurling a diamond and straight knurl.

 XVI.    Explain the function of a knurled surface

         A.      Provide a gripping surface

         B.      Improve appearance

         C.      Increase diameter for a light press fit

 XVII.   Differentiate between types of knurling holders:

         A.      Knuckle holders

         B.      Revolving head

         C.      Straddle holder

 TOPICAL OUTLINE:

 

 I.      Boring: Intermediate Boring.

 II.     Arbors: The Arbor as a Workholding Device.

 III.    Sine Bars: The Sine Bar as a Device for Accurately Laying Out Angles.

 IV.     Counterboring and Countersinking: Methods for Producing Features to Accommodate Screw Heads.

 V.      Parallel Turning: Factors Involved in Producing Parallel Parts by Turning.

 VI.     Sizing: Terminology Used in Specifying the Size of a Lathe.

 VII.    Knurling: Knowing Types and Function of Knurls and How to Produce