Page 71 - CITS - Fitter Trade Practical - Volume -2
P. 71

FITTER - CITS



           EXERCISE 65 : Dismantling and mounting of pulleys



            Objectives

           At the end of this exercise you shall be able to
           •   calculate the distance of the lap, the distance between centre of first rivet and edges and the distance of
              pitch as per BIS standard
           •   layout the spacing for rivet holes to make a single riveted lap joint.


































           Job Sequence

           Extract pulley from shaft

           •  Remove pulley using puller.
           •  Remove pulley using arbour press.
           Extract pulley using puller
           •  Select correct size of puller, depending upon the size of  the shaft and pulley.
           •  Clean end of the shaft using flat file, to remove any burrs or bulging on the end of the shaft.

           •  Place the legs of the puller diagonally opposite sides of the pulley to hold the pulley firmly (Fig 1).

             Fig 1



















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