assignment for workshop practice

1. MUHAMMAD ZAHIRUL HISYAM BIN HELME
50225220195
ASSIGNMENT 3
MACHINE SHOP WORK
(OPERATION ON THE LATHE)

3. First check the rough stock
against the drawing to make sure
its proper size.

4. First step is to cut a true
finish on the face the gear
blank.

5. Second step is drilling a
hole.

6. 3rd step is a trial boring
cut is made to get the
correct taper.

7. 4th step another trial
boring cut to
establishes the correct
taper.

8. 5th step bring the taper
down to the rough size.
6th step is reaming operation
finishes the taper to exact size.

9. Used 4 jaw independent
chuck because it will
hold the stock securely.
The stock is centred approximately by
checking with the concentric circle scored
on the chuck face.

10. For the facing and truing cut a right hand facing tool is needed for
this operation notice the position of the cutting edge.

11. Check the drawing for
taper size and select
the drill that is smaller
than the small end of
the taper.

12. Cut a guide hole at the
centre of the stock.

13. Then drill fed into the centre
hole ad start to drill. Drop
some cutting oil as a lubricate
to easy motion.

14. To make an internal taper
accurately, the taper
attachment is used.
And it has compound slide than
is fastened to the lathe bed.

15. Taper of one and one-half inches per foot the taper attachment must be set to this
specification the slide is set to 11/2 inches per foot.

16. Next step is actual boring,
and the cut is made to
established the angle and
the depth of the cut is set by
turning the compound feed
wheel counterclockwise.

17. After a light trial cut is made, the taper hole is cleaned and check to see the angle is
correct and the plug gauge is a tool for checking tapers and its fits snugly.

18. The final cut with a boring tool
is made and check again with
plug gauge as shown and its
fits snugly.

19. Reamer is used for the finishing cut of fire
thousands this is one method of reaming.

20. The reamer requires lubrication cutting
ill is used to prevent damage, the
reamer is never force into the hole
reaming and set the slow speed while
drilling.

21. Insert the plug gauge and
the reamer must never be
turned backwards in the hole
and the taper plug fits
perfectly and the operation is
finished.