STANDARD COMPETENCIES:

 

 I.      Idenify the common thread forms

         A.      Square

         B.      Acme

         C.      American National

         D.      Knuckle

         E.      Buttress

         F.      Unified

 II.     Differentiate between single lead and multipy lead threads.

 III.    Explain the nomenclature of the American national and unified screw threads.

 IV.     Demonstrate grinding cutting tool and using the center gage to check accuracy.

 V.      Demonstrate setting the compound slide at the proper angle for threading.

 VI.     Demonstrate Setting the quick change gear box for the desired thread pitch.

 VII.    Recognize the function of the half nut and lead screw.

 VIII.   Demonstrate engaging the threading lever.

 IX.     Differentiate between class 1,2,3, and 4 fits.

 X       Demonstrate machining external and internal class 3 UNC and UNF threads.

 XI.     Demonstrate turning to external diameter accuracy of .0005 inch.

 XII.    Demonstrate facing work piece to length accuracy of .001 inch.

 TOPICAL OUTLINE:

 

 I.      Thread Types: Internal and Exteral Threads of Various Forms.

 II.     Thread Cutting Preparation of the Cutting Tool and Lathe for Threading.