Figure 8.52, Manufacturing Processes forEngineering Materials2nd Ed, Kalpakjian, p. 541

Recall the key terms from the last slide.
Bed:Supports all other machine parts
Carriage: Slides along the machine ways
Head stock: Power train of system (spindle included)
Tail Stock: Fixes piece at end opposite to the head stock
Swing: Maximum diameter of the machinable piece.
Often differentiate between the swing over bedways (facing) and the swing over cross slide (turning)
over cross slide- duh cross slide is under part as one is turning- thus smaller diameters-
over bedways - if facing at end of part you DO not have to move the slide under the part-- thus you have more room and bigger swing.
Lead screw (& feed change gear box) allows you to control the feed per revolution with a great deal of precision.This is vital when cutting screw threads, as it lets you precisely control the pitch of the thread.

The EMCO lathes here in the RDPL (& CNC machines in general) are set up a little differently in that the feed rates are DETACHED from the spindle speed.
On MANUAL machines require some mechanical linkage between spindle speed and feed rate--ON CNC machines computer can precisely control thus no mechanical linkage