The Lathe: workholding & tool angles & speed calc Flashcards
What are the two main methods of workholding on the lathe
The two main methods of workholding on the lathe are using a 3-jaw or a 4-jaw chuck
How does the 4-jaw chuck grip material and what type of materials does it grip?
The 4-jaw chuck can grip square material and can grip material off-centre where a 3-jaw chuck cannot.
What are the three important angles in the construction of a cutting tool?
There are three important angles in the construction of a cutting tool rake angle, clearance angle and plan approach angle.
What is the formula for cutting speed?
πd
Where: N = Spindle Speed (RPM)CS = Cutting Speed of Metal (m/min)d = Diameter of Workpiece
What is screw cutting?
It is a slightly more difficult task than plain turning because it involves accurate setting up of the tool and exact setting of feed in relation to the work rotation..Fig 10 shows the arrangement in simplified form.
