Turning a taper on a long piece of material is best achieved by offsetting the tailstock.
The material is held between two centres as a normal three jaw chuck cannot be used.
A three jaw chuck will not hold the material safely or accurately when a long taper is being turned.
Diagram ‘A’ below shows the side view of the two centres, the material and the toolpost.
Diagram ‘B’ shows a birds eye view (plan view) of the same equipment.
However, this time it can be seen that the tailstock has been adjusted so that it is off centre.
This means that a long taper can be turned.
A small amount of material must be removed with each pass of the cutting tool.
Also the lathe should be setup so that the cutting tool feeds automatically along the bed of the lathe.
This will lead to a better finish to the surface of the material.
Diagram ‘C’ shows the scale at the back of the tailstock.
To adjust the tailstock so that it is off centre usually
means loosening a number of allen screws,
offsetting the tailstock
and then tightening the screws back in position.
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