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