Page 165 - CITS - Fitter Trade Pactical - Volume - 2

FITTER - CITS

EXERCISE 47: Practice on square fitting, step fitting etc.

as per given drawing

Objectives

At the end of this exercise you shall be able to
• mark off lines using vernier height gauge
• file steps maintaining accuracy ± 0.02 mm
• maintain squareness using safe edge file
• drill relief hole
• match male & female parts with accuracy 0.02mm.

Procedure

PART - 1

• Check the raw material for its size.
• File and finish to size 70 x 50 x 9.5 mm maintaining parallelism and perpendicularity.
• Mark and punch in part ‘1’ .
• Drill Ø 3 relief holes as shown job drawing.
• Chain drill holes for parting off excess material from part ‘1’ .

• Cut and remove excess material using web chisel and ball pein hammer.
• File steps to size maintaining accuracy ± 0.02 mm and squareness using safe edge file different grades
• Check the size with Vernier caliper .
• Maintain thickness 9mm.
• Remove burrs/sharp edge.

PART- 2
• File and finish to size 70 x 50 x 9.5 mm maintaining parallelism and perpendicularity.
• Mark and punch in part -2 as per drawing.

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