Name: _________________________                      Date _________________________

 

 

                Part # PS7E

                Part Desc: Internal Acme Screw Jack Body

                Quantity Reqd: 1

 

PLEASE HAVE INSTRUCTOR INITIAL AND DATE AFTER REQUIRED OPERATIONS

 

                                                                                                          Instructor

Step #              Location                      Description                             Initials                   Date       

 

 

    10                        Instructor                              Secure stock from Instructor             

 

    20                        Lathe                                      Place part in a 4 jaw chuck

                                                                                center part to within .005

                                                                                using dial indicator.

    30                        Lathe                                      Face end to clean up.

 

    40                        Lathe                                      Center drill, pilot drill, and

                                                                                drill the 1-1/4 drilled hole to

                                                                                depth.

 

    50                        Lathe                                      Turn part in the 4 jaw chuck

                                                                                center part to within .005

                                                                                using dial indicator.

       

    60                        Lathe                                      Layout and face part to length.

 

       

    70                        Student                                  Look up in the Machinery’s

                                                                                Hanbook  the minor diameter

                                                                                specifications for the thread.

                                                                                Input these dimensions on

                                                                                the print.

 

    80                        Instructor                              Have instructor check

                                                                                specifications for the

                                                                                thread.

 

    90                        Lathe                                      Center drill, pilot drill, and

                                                                                drill approx. 0.030 inches

                                                                                under the minor diameter of the thread.

       

  100                        Lathe                                      Set up to bore minor diameter

                                                                                of the thread.

 

 

  110                        Lathe                                      Bore the hole for the thread.

 

  120                        Lathe                                      Bore the 0.12 X 45 degree chamfer.  

 

 

Name: _________________________                      Date _________________________

 

 

                Part # PS7E

                Part Desc: Internal Acme Screw Jack Body

                Quantity Reqd: 1

 

PLEASE HAVE INSTRUCTOR INITIAL AND DATE AFTER REQUIRED OPERATIONS

 

                                                                                                          Instructor

Step #              Location                      Description                             Initials                   Date       

 

 

 

  125                        Grinder                                   Grind an internal Acme threading tool.

 

  130                        Lathe                                      Setup to internally thread the

                                                                                part. Be ready to answer questions

                                                                                concerning procedures for internal

                                                                                acme threading and spring cuts.

 

  135                        Instructor                              Have Instructor check setup.            

 

  140                        Lathe                                      Thread the part. Use a

                                                                                thread gage to check the fit.

 

  150                        Bench                                     Deburr and Inspect part

 

  160                        Instructor                              Have graded by instructor.