Page 90 - CITS - Fitter Trade Practical - Volume -2

FITTER - CITS
Job Sequence

TASK 1: Angle gauge

• Check the raw material for its size
• File and finish the plate to size 60 x 20 x 3.8mm (0.4mm thick for grinding allowance
• Mark centre lines for the 60° external Vee and relief grooves.
• Mark centres for 2 mm relief hacksawing.
• Cut off excess metal with a hacksaw from the plate, for the two ‘V’ grooves.
• Ensure that punch marks are visible and sufficient metal is left for finish filing

• File and finish the sides of the groove with a knife edge file
• Ensure that the width of the remaining metal on both sides of the ‘V’ grooves end is equal.
• Check the accuracy of the 60° angle with the template / gauge supplied.
• Repeat the steps for the ‘V’ groove.

• Cut off excess metal from the plate for external ‘Vee’ on one side.
• File and finish the side of the ‘VEE’ correct to the centre line.
• Cut off excess metal from the other side of ‘Vee’
• File and finish the ‘Vee’ to the centre line
• Check the 60° & 45° angle with a vernier bevel protractor file, and finish all the edges.

• Remove burrs and check the dimensions.

TASK 2: Template of different profiles
• Check the raw material for it s size
• Remove burrs and check the raw material size.
• File the large surface with a 200mm flat second cut file (Hold the sheet on the wooden block)

• File two adjacent sides - flat and square.
• Make relief hole by drilling as per drawing.
• Mark dimensions as per drawing.
• Hacksawing and remove the excess material.
• File and finish the remaining surfaces (60mm) to size and check the size.
• File and finish external and internal 60° angles and radius check with vernier bevel protractor and gauge.

• File and finish thickness to 3 mm, by fixing work on the wooden block.
Care should be taken to maintain the correct lengthThe wringing of the angle gauges should be
carried.

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CITS : C G & M - Fitter - Exercise 67