Page 87 - CITS - Fitter Trade Practical - Volume -2

FITTER - CITS

Base plate
This provides a rigid support for mounting piece parts, locating pins etc.
In some drill jigs like plate and clamp jigs there will be no base plate.

Drill plate
It holds the drill bushes. Cutting tools are guided by means of the drill bushes. Unbushed holes made on the drill
plate are sometimes used for small runs.

Fig 1

1 Punch/Witness marks as per drawing using dot punch and marking hammer.
2 Remove the extra material from the job using chisel/hacksaw frame with blade.
3 File the job up to marking lines using flat second cut file.
4 Check all the dimensions as per drawing using vernier caliper / micro meter.

5 Insure all the dimensions with in tolerance using flat.

72

CITS : C G & M - Fitter - Exercise 66