Page 80 - CITS - Fitter Trade Practical - Volume -2

FITTER - CITS
Use simple jigs and fixtures for drilling

Objectives : At the end of this exercise you shall be able to
• locate the work piece in a jig
• drill the hole on MS Channel
• check for the accuracy.

Job Sequence

Plate jig - trial
• Use previous Ex.No. 4.1.159 drill jig.
• Remove the top plate from the plate jig.

• Locate component between the hook bolt and touch with stopper pin.
• Clamp the top plate with the knobs.
• Drill dia 6 x 4 Nos.
• Remove the top plate.

• Take out the component from the jig.
• Check the component with a vernier caliper.

Lap flat surfaces using lapping plate

Objectives : At the end of this exercise you shall be able to
• lap the surface using lapping plate
• smear the lapping medium
• check the surface quality with surface roughness standard set.

65

CITS : C G & M - Fitter - Exercise 66