Page 43 - CITS - Fitter Trade Practical - Volume -2
P. 43

FITTER - CITS

            Drill on M.S Flat


           Objectives: At the end of this exercise you shall be able to
           •   file flate and square
           •   mark the profile as per drawing
           •   drill relief holes, chain drilling and hacksawing
           •   chip, file to size and profile as per drawing
           •   file Go end and No GO end to size
           •   check the gap GO end and NO GO end with slip gauge.







































            Job sequence


           •   Check the raw material for its size.
           •   File and finish to size 85 x 72 x 9 mm maintaining parallelism and perpendicularity.
           •   Mark drill holes as per drawing.

           •   Punch on drill hole centres using centre punch 90°
           •   Make centre drill in all drill hole centres.
           •   Fix Ø 6 mm drill and drill pilot holes in all centre drilled holes.
           •   Similarly fix Ø 8 mm, Ø 10 mm, Ø 12 mm, and 16mm drill in drilling machine and drill holes as per drawing.
           •   Finish file and de - burr in all the surfaces of the job.

           •   Check the size with vernier caliper.
           •   Apply a thin coat of oil and preserve it for evaluation.










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                                            CITS : C G & M - Fitter - Exercise 62
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