Page 67 - CITS - Fitter Trade Pactical - Volume - 2
P. 67

FITTER - CITS

           Chipping on mild steel with cross cut chisel




                  TASK 1

















                  TASK 2



















           Job Sequence
           Job Sequence
           TASK 1: Chipping oil groove
           •  Check the raw metal with steel rule
           •  File and finish the raw metal to size 70 x 45 x 9mm
           •  Mark the oil groove curve as per drawing.
           •  Chip the oil groove with round nose chisel maintaining the dimension width 3 mm.
           •  Check the keyway size with steel rule.

           TASK 2: Chipping keyways at various angles
           •  Check the raw metal for its size.
           •  File to size 70x48x9 mm.
           •  Check the size with vernier caliper.
           •  Check the squareness with try square.
           •  Apply marking media and mark keyways using Vernier    height  gauge and keyway angles using vernier bevel
              protractor.
           •  Punch witness marks.
           •  Hold the job in bench vice.
           •  Chip keyways with cross cut chisel to the required depth.
           •  Chip keyways sharp corners with a dimond point chisel.
           •  Check the job size with vernier caliper.
           •  Check the anlges with vernier bevel protractor.
           •  Finish the job and deburr it.
           •  Apply thin coating of oil and preserve it for evalvation.

              Grind the chisels well
              •  Look always at the cutting edge.
              •  Cool the cutting edge from time to time.



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                                            CITS : CG & M - Fitter - Exercise 17
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