Page 65 - CITS - Fitter Trade Pactical - Volume - 2

FITTER - CITS

EXERCISE 17 : Exercise on chipping a flat surface on mild

steel & cast Iron blocks, with a flat & cross

cut chisel

Objectives

At the end of this exercise you will be able to
• chip surfaces evenly using a flat chisel.
• chip curve on flat bearing surface with uniform round nose chisel
• chisel/half round chisel.
• chip keyways at various angles with cross cut and diamond point chisel.

Note: Each trainee should practice chipping of 3 layers of 1.5 mm deep.

Job Sequence
Job Sequence

• Apply marking media and mark the depth of metal to be removed by chipping.
• Punch the marked line with a dot punch.
• Hold the job firmly in the vice.
• Support the job with wooden block while chipping.

If necessary give a wooden support below the work piece so that the marked line should be above
the vice jaw face.

• Select a flat chisel 20 mm width with proper cutting edge.
• Select a ball pein hammer of 1 kg.
• Hold the chisel at approximately 35° angle of inclination in chipping position.

• Hold the hammer at the end of the handle to get more leverage.

Caution: Chisel should be free from mushroom head.

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