Page 51 - CITS - Fitter Trade Practical - Volume -2

FITTER - CITS

Start the machine and feed the drill. When the stop nut reaches the arm, the blind hole is drilled to the requiredm
depth. (Fig 3)

Note: While drilling, release the drill frequently from the hole for the chips to be flushed out by the
cutting fluid.

Fig 3

Form internal threads with taps to standard size (through
holes and blind holes)

Objectives: At the end of this exercise you shall be able to
• chamfer the holes for tapping
• fix the job in bench vice
• select the tap set
• cut internal threads in through and blind holes using hand tap and tap wrench.

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CITS : C G & M - Fitter - Exercise 62