Conventional milling, also called up milling, involves cutting with the tool rotating opposite to the feed direction, resulting in gradually increasing chip thickness. Non-conventional milling, or down milling, cuts with the tool rotating in the same direction as the feed for maximum chip thickness at the start and less heat generation. Down milling provides better surface finish and tool life compared to conventional milling, but conventional milling is better for some materials.

1. CONVENTIONAL & NON-
CONVENTIONAL MILLING
Submitted By-
Satyam Mani tripathi
Mechanical (5th SEM)

2. CONTENT-
1. Introduction.
2. Schematic Diagram.
3. Working.
4. Advantages
5. Disadvantages.
6. Application / use
7. Difference
8. Conclusion

3. 1 2 3
INTRODUCTION-
Conventional milling-
This is also called as Up milling or Climb up milling.
In up milling (conventional milling), the feed direction of the cutting tool is
opposite to its rotation. That means the cutter rotates in the anti-clockwise
direction, while the direction of feed is from right to left,So, due to this
opposite motion, the width of the cutting chips gradually increases from
minimum to maximum.
Non Conventional milling-
This is also called as Down milling or Climb down milling
In this milling, the cutter rotates in the same direction as that of
the feed,the metal is removed by a cutter rotating in the same
direction of feed of the workpiece,Chip thickness is maximum at the
start of the cut and minimum in the end.

4. DIAGRAM-
Conventional (up) Milling Non Conventional (down) Milling

5. WORKING-
Conventional Milling
As we already know in this process,the direction of cutter rotation is
opposite to that of feed motion. If cutter rotates clockwise, the feed
motion will take place in rightward direction.the metal is removed in the
form of small chips,As a result in workpiece metal gets remove.There is
massive friction between the cutter and workpiece which results in
generating a large amount of heat.
Non Conventional Milling
As we already know this method, the metal is removed by a cutter rotating
in the same direction of feed of the workpiece
Chip thickness is maximum at the start of the cut and minimum in the end.
In this method, there is less friction involved and consequently less heat is
generated on the contact surface of the cutter and workpiece.

6. ADVANTAGES-
Conventional Milling
1. This is a safe operation because
It has no tendency to drag the
workpiece into the cutter
2. The cutter is not affected by the
sandy surfaces of the work
piece.
3. It doesn’t require backlash
eliminator
4. Built up edge ( BUE ) fragments
are not available on the
machining surface.
5. The loads on the teeth are
acting gradually.
Non Conventional Milling
1. This machine poses a longer
tool life.
2. This machine produces a good
surface finish
3. Tool blunting is less
4. It is characterized by less
tendencies of chattering and
vibration.
5. The fixture are simple and less
costly.

7. DISADVANTAGES-
Conventional Milling
1. The propensity of slicing
power to lift the work from
the installations and poor
surface completion.
2. Due to the more tool wear
rate, the durability of the
tool is less.
3. Generates Large amount of
heat
Non Conventional Milling
1. The chip thickness is
maximum at the point of
tooth contact with the work
piece.

8. APPLICATION / USE
Conventional Milling-
This machine is mostly used for
cutting of brass, bronze, and
ferrous materials
Non conventional milling
It is mostly applicable for
aluminium and aluminium alloys.

9. Difference-
Conventional Milling Non conventional Milling
1 It is also known as up milling It is also known as down milling
2. In this milling, the cutter rotates
against direction of feed.
In this milling, the cutter
rotates with direction of feed
3. The width size of the chip is zero
at initial cut and increase with
feed. This will maximum at the
end of feed.
The size of the chip is
maximum at start of cut and
decrease with the feed. This
will zero at the end of feed.
4. The heat is diffuse to the work
piece which causes the change in
metal properties
The heat is diffuse to the chip
does not change the work piece
properties

10. 5 The tool wear rate is more because
tool runs against the feed
The tool wear rate is less because
the cutter rotates with feed
6 The cutting chips fall down in front of
the cutting tool.
The cutting chips fall down behind
the tool.
7 It gives less surface finish. It gives good surface finish.
8 The cutting chips are carried upward
with the help of tool.
The cutting chips are carried
downward with the help of tool.
9 Tool life is less Tool life is good
10 It requires high cutting force. It requires low cutting force.
11. This is also famous as traditional way
of cutting the surface
This is non – traditional way of
cutting the work piece

11. CONCLUSION-
In this Complete analysis about Milling methods we have
read everything about both methods
If we conclude then we can say
Down milling is a better choice than up milling as we get the
best finishing surface as well as there is less heat
generation. But in some exceptional conditions we have to
use up milling. Also….