Write down the steps involved for internal thread cutting on lathe machine.

Write down the steps involved for internal thread cutting on lathe machine.
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Answer :

Steps involved for internal thread cutting on lathe machine 

1) Hole is first bored to the root diameter of the thread. 2) Tool is fixed on the tool post or on the boring bar adjusted the angle of the top slide to 29.5 degrees and mounted the threading tool at the correct angle using a thread gauge/angle gauge. to get a symmetrical thread shape. 3) Zeroed both the cross slide and top slide to touch the interior surface of the tube. 4) Make sure the apron was well clear of the workpiece - towards the tailstock, Zero the cross slide. 5) Adjust the top slide to give the required cutting depth. 6) Engage the half-nut lever - making sure it was properly engaged. 7) Keep cutting until 15mm has been reached - disengage the half nuts. 8) Wind the cross slide in to make sure the cutting tool clears the workpiece. 9) Move the apron back towards the start. 10) Keep going until the calculated depth of cut has been reached on the top slide.

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