5. Thread cutting by dies on recessed cylindrical workplaces

External thread results from outer surface processing of the workpiece.

- Work is made in the chuck.

- The workpiece is clamped in the extended chuck jaws.

- The die is positioned in the die holder.

- The die is brought into position with the help of the quill.

- The first thread turns are cut by hand.

- Following the starting cut machine processing is made with the help of a support for the die holder.

- Ensure that the chip chambers are kept clean.

- Switch off the lathe 2 - 3 mm before reaching the shoulder and cut the remaining thread turns by hand in order to prevent tool breakage and ensure sound quality.

- Turn the die back by hand upon ending the work sequence. Having completed the thread, deburr all sharp edges with a finishing file.

- Ensure proper cooling and lubrication. Only measure and check with the machine at rest.

- The thread is checked by means of a thread ring gauge.

How is the die positioned on the workpiece?
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