plz.. give capstan lathe vs turret lathe filetype ppt

Tommorow i have to submit the project idea please help me.

Capstan lathe


It is a light duty machine
The turret head is mounted on the ram and the ram is mounted on the saddle.
The saddle will not be moved during machining
The lengthwise movement of turret is less
Short work pieces only can be machined.
It is easy to move the turret head as it slides over the ram
The turret head cannot be moved crosswise
As the construction of lathe is not rigid, heavy cut cannot be given
It is used for machining work pieces up to 60mm diameter
Collet is used to hold the work piece


Turret lathe


It is a heavy duty machine

The turret head is directly mounted on the saddle and the saddle slides over the bed ways
The saddle is moved along with the turret head during machining
The lengthwise movement of turret is more
Long work pieces can be machined
It is difficult to move the turret head along with saddle
The turret head can bbe moved crosswise in some turret lathes
As the construction of lathe is rigid, heavy cut can be given
It is used for machining work pieces up to 200mm diameter

Althogh both have many similarities still they have some differences. Some of them are :-

Turret lathe:-

1. Turret tool head is directly fitted on the saddle and both of them appear like one unit

2. Saddle is moved to provide feed to the tool.

3. It is difficult to move the saddle for feed.

4. As the saddle can be moved along the entire length of the bed, it is suitable for longer workpieces.

5. To index the turret tool head, a clamping lever is released and the turret is rotated manually.

6. Limit dogs are used to control the distance of tool movement.

7. Some turret lathes have the facility of moving the turret at right angles to the lathe axis.

8. Heavy and sturdy.

9. Suitable for machining heavy and large workpieces 10. Machining can be done by providing more depth of cut and feed.

Capstan lathe:-

1. Turret head is mounted on a slide called ram which is mounted on the saddle.

2. To provide feed to the tool, saddle is locked at a particular point and the ram is moved.

3. It is easy to move the ram for feed.

4. As the movement of the ram is limited, it is suitable for machining shorter workpieces only.

5. When the handwheel for the ram is reversed, the turret tool head is indexed automatically.

6. To control the distance of tool movement, feed stop screws are provided at the rear side of the turret.

7. No such facility.

8. Lighter in construction.

9. Only small and light workpieces are machined.

10. Only limited amount of feed and depth of cut are provided for machining