Machine tool• A machine which performs the material

removal operation with tools, to produce desired shape and size of the work pieces

• The purpose of machine tool is to save the time, cost of production and to get better output which can not be obtained with hand tools

• Ex: lathes, shapers, planers, drilling machines and grinding machines etc

ENGINE CENTRE LATHE

Lathe • The lathe is one of the most important

machines in any workshop• Its main objective is to remove material from

outside by rotating the work against the cutting tool

• Lathe is used to produce cylindrical jobs• Also used for drilling, threading, grinding and

milling etc

Working principle of lathe

Working principle of lathe• The work piece is held in a chuck or between

centres and rotated about its axis at a uniform speed

• The cutting tool is held in the tool post is fed into a work piece for a desired depth and in the desired direction

• Material is removed in form of chips and the desired shape is obtained.

Types of lathes

• Speed lathe• Engine or centre lathe• Tool room lathe• Capstan and turret lathe• Automatic lathe• Special purpose lathe

CARRAIGE ASSEMBLY

CARRAIGE ASSEMBLY

SPLIT NUT ASSEMBLY

FOUR JAW CHUCK

COLLET CHUCK

COLLET CHUCK

THREE JAW CHUCK

LIVE AND DEAD CENTRES

LIVE CENTER

TAIL STOCK

SINGLE POINT CUTTUNG TOOL

LATHE TOOLS

KNURLING TOOL

LATHE OPERATIONS

MACHINING PROPERTIES

• FEED: The distance by which the tool advanced between two consecutive cuts.

• Depth Of cut : The advancement of the tool into workpiece in transverse direction.

• Cutting Speed: The speed at which the spindle is rotating and machining is being done.

TAPER TURNING OPERATIONS

GROOVING OPERATION