The document describes various lathe operations including: facing, turning, taper turning, chamfering, parting, threading, drilling, boring, knurling, and spinning. Facing involves machining a flat surface across the face of a workpiece. Turning removes material from cylindrical and conical external surfaces by rotating the workpiece as the tool is fed parallel to the axis of rotation. Taper turning produces a conical surface by feeding the tool at an angle to the workpiece axis. Chamfering bevels the edges of a workpiece. Parting separates one section of a workpiece from the rest using a cutoff tool. Threading produces threads on the outer surface of a cylindrical workpiece using a specific

1. LATHE OPERATIONS
1. FACING
2. TURNING
3. TAPER TURNING
4. CHAMFERING
5. PARTING
5. PARTING
6. THREADING
7. BORING
8. DRILLING
9. KNURLING
10. SPINNING

2. FACING
• FACING is the process of
machining a flat surface
across the face of a
WORKPIECE.
• In FACING operation, the
TOOL is fed at 90° to the
axis of rotation.

3. TURNING
• TURNING is the process of the removal
of material from the cylindrical and
conical surfaces externally.
• In TURNING operation , the WORKPIECE
is made to rotate about its axis in
LATHE machine.
WORKPIECE
LATHE machine.
• The TOOL is fed along the surface of the
cylindrical WORKPIECE to remove metal
from the cylindrical WORKPIECE.
• In TURNING operation, TOOL fed
parallel to the axis of rotation of the
WORKPIECE.
TOOL

4. TAPER TURNING
• In TAPER TURNING
operation, the TOOL is fed at
an angle to the axis of
rotation of the WORKPIECE.
• Taper turning is an operation
• Taper turning is an operation
in which taper cylindrical
surface, i.e., cone type
surface is produced.

5. CHAMFERING
• CHAMPHERING is the
operation of beveling
the extreme end of a
WORKPIECE.
• CHAMPHERING
operation is done to
remove burrs from the
edges of the work piece.

6. PARTING
• PARTING is the operation in which by
which one section of the WORKPIECE is
separated from the remaining by
means of CUTOFF TOOL.
• In this operation, the job is held on a
• In this operation, the job is held on a
chuck, rotates to the turning speed and
the parting-off tool is fed into the job
very slowly until the tool
reaches to the center of the job.
• It is the operation of cutting-
off/grooving a bar after it has been
machined to the required shape and
size.

7. THREADING
• Thread cutting is the operation of
producing threads on the outer
surface of a cylindrical workpiece.
• For thread cutting on the lathe, there
is a definite relationship between the
speeds of the job and tool.
speeds of the job and tool.
• The relationship is obtained by gear
ratio which selection depends on the
pitch of the job, the pitch of the lead
screw, number of the start of the
thread on the job.

8. DRILLING
• DRILLING is the operation
of producing a cylindrical
hole in a WORKPIECE.
• The TOOL used for
• The TOOL used for
DRILLING operation is
called as DRILL.

9. BORING
• BORING is the lathe
operation of enlarging
an existing hole that is
produced by drilling .
produced by drilling .

10. KNURLING
• KNURLING is process of
embossing a diamond
shaped pattern on a
workpiece surface.
• The purpose of KNURLING
is to provide an effective
gripping surface on a
WORKPIECE.

11. SPINNING
• Spinning is a process to produce a circular
homogeneous pot or house hold utensil.
• In this operation, the sheet metal job is held
between a form tool attached with headstock
spindle and the tailstock center and rotates at
high speed with the form tool.
• The long round nose forming tool fixed rigidly
on special tool post presses the job on the
periphery of the former as shown fig.
• Thus the job is deformed exactly in the shape
of form tool and the operation is known as
spinning.
• It is chip-less machining process.