Which part of a lathe machine is involved for taper turning?

Explanation:

A taper is a gradual increase or decrease in diameter along the length of the job. 

Turning is an operation which reduces the diameter of a workpiece to a desired dimension and length of the workpiece remains the same.

There are different types of turning processes as follows:

Plain turning:

• In plain turning, the material is removed from the full length of the work and after turning diameter is same throughout the length of the workpiece

Step turning:

• It is an operation of producing various steps of different diameters in the workpiece
• The operation is carried out in a similar way as in plain turning

Taper turning:

• In the taper turning process, the diameter of the work is not the same throughout the length of the workpiece
• It either gradually decreases from the one end to the other end or increases
• The cross-slide is mounted on the top of the saddle, and it provides cross-movement for the tool. 
• This is fitted at right angles to the bed and is moved by means of a screwed spindle, fitted with a handle.
• Taper turning attachment:
  • The taper attachment is used for turning and boring tapers
  • It is bolted to the back of the carriage saddle and is connected to cross slide
  • The guide bar support which is used to set the required taper angle is clamped to the lathe bed
  • On either side, the guide bar can be swiveled to a maximum angle of 10°
  • Usually, during taper turning, the job will be held in the chucks or in the centers

Important Points

Lead screw

• The lead screw is used for thread cutting. It is made from good quality alloy steel and is provided with acme thread.
• It is driven from the head stock through the feed gearbox and moves the carriage in a longitudinal direction against the workpiece.