Page 68 - CITS - Fitter Trade Pactical - Volume - 2

FITTER - CITS

EXERCISE 18: Exercise to make the flat chisel by grinding

Objectives

At the end of this exercise, you will be able to
• re-sharpen the flat chisel using pedestal/bench grinder
• operate safely the pedestal or bench grinding machine.

Note: Instructor shall provide chisels for re-sharpening.

Skill Sequence
Job Sequence

Grinding of flat chisel

Objectives : At the end of this exercise, you will be able to
• grind a flat chisel when they become blunt.

Before grinding: Check the grinding wheel by,
– sliding the finger tip across the grinding wheel to detect glazing
– (In case of glazing, dress the wheel.) For dressing use silicon carbide sticks and seek the help of the instructor.
(Fig 1)
– visually check for cracks.
Switch on the grinder, stand by the side of the wheel for safety, and see whether the wheel runs ‘true’ and
has no excessive vibration. In case of excessive vibration, truing is necessary. Ask the instructor for advice.

Ensure that there is enough coolant in the container.
Protect your eyes with goggles or lower the protecting shield near the tool rest. (Fig 2)
Adjust the tool rest 2 mm closer to the wheel, if necessary. (Fig 2)

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