In this article we have discussed Lathes and its different types. In this article you will also learn about working, different applications and lathe machine parts.
After reading this article you would be able to understand lathe as a tool (Manufacturing Science) in a better way.
What is a lathe?
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A lathe is probably one of the oldest machine tool invented by human beings. It is generally used to generate cylindrical surfaces but many different kinds of surfaces can also be generated by them.
A lathe is a simple to use machine tool and has different types (according to use)
Types of lathe
- Centre lathe
- Bench lathe
- Tool room lathe
- Special purpose lathe
- Copying lathe
- Gap bed lathe
- Hollow spindle lathe
- Capstan and turret lathe
- Automatic lathes
Centre lathe is most common and is used for general purpose. They can perform diverse operations but has less productivity
Tool room lathes are generally used for tool making. They have very high accuracy.
Special purpose lathe machines are used to perform specific operations which cannot be generally performed by Centre lathe.
Capstan, Turret and Automatic lathes are used for high production rates. They are generally used for special purpose. They can also run unattended if necessary.
lathe machine parts
- Feed change gear box
- Compound rest and slide
- Tool post
- Carriage (or Saddle)
- Feed rod
- Lead screw
Types of tools that can be used in lathes
There are many tools which are used to generate specific kind of surfaces. They are
- Parting tool
- Turning tool
- Right hand turning tool
- Left hand turning tool
- Radius turning tool
- Thread cutting tool
- Chamfering form tool
- Internal turning tool
- Internal facing tool
- Recess or groove making
- Internal threading tool
Operations that can be performed in a Centre lathe
To increase the capabilities of a Centre lathe and to perform diverse operations following attachments can be used
- Milling attachment
- Grinding attachment
- Copy turning attachment
- Radius turning attachment
Limitations of Centre lathe
- Setting time for holding job is very high
- Only one tool can be used generally at a time
- Idle time in between the operation is high
- Preciseness of the job depends highly on the skills of operator
For overcoming limitations of Centre lathe, Capstan, Turret and Automatic lathes are invented. They have basically achieved improvements in the following areas.
- Work holding methods
- Multiple tool availability
- Automatic feeding of tool
- Automatic stopping of tool at precise locations
- Automatic control of proper sequence of operations