(a)
Use neat sketches to illustrate the following lathe operations:
(i) Facing a 300 mm diameter aluminium alloy pulley
(ii) Machining a 450 \times 3 mm chamfer on a mild steel bar
(3 marks)
(3 marks)
NB: Each sketch should show the workpiece and tool, rotation of workpiece, direction
of feed, and direction in which the chips will flow.
(b)
List the steps of procedure to face a 50 mm diameter steel bar.
(4 marks)
(c)
State the difference between a faceplate and a driveplate.
(2 marks)
(d)
Figure 2 shows two views of a lathe turning tool.
A
B
C
D
Figure 2. Lathe turning tool angles
(i)
In your answer booklet, name the angles indicated by the letters A, B, C, D.
(4 marks)
(ii)
State the difference between the function of angle 'A' and angle 'B'. (2 marks)
(c)
State TWO precautions to be observed while working on the lathe.
(2 marks)
