CLarke C430 lathe threading

[tatlerParticipant @tatler]

Clarke C430 lathe does not have a TDI.

I seen some guys construct one and wonder if anyone can advise me about  how i go about making one for this machine.

 

The leadscrew pitch is 2mm and what number of teeth on a gear should i use  and, do i need more than 1?}[most lathe i worked on have a number  of gears on the indicator].

Thanks in advance

 

Joe

[bernard towersParticipant @bernardtowers37738]

depending on the amount of screw cutting you do why cant you just reverse the lathe?

[Thor 🇳🇴Participant @thor]

Hi Joe,

May be this link can help you?

Thor

[DC31kParticipant @dc31k]

In addition to the link above, which gives you a fish, you can learn the art of fishing by reading Martin Cleeve’s book “Screwcutting in the lathe”. If time is pressing, you only need to read Section 5, starting on page 71.

[Dave HalfordParticipant @davehalford22513]

Using Thors link and ebay  buy one ready made for £19

[DC31kParticipant @dc31k]

[Dave HalfordParticipant @davehalford22513]

I was forgetting these lathes are primarily made for America.

[Howard LewisParticipant @howardlewis46836]

One way to manage without a T I D is to withdraw the tool, and reverse the lathe, leaving the half nuts engaged. Having reversed well clear of the work, applying the incremental cut, and running forward will remove any half nut / leadscrew backlash and take the next incremental cut.

In this way, there will be no fear of losing the Thread / Leadscrew relationship.

Just ensure that any backlash is taken out before starting the next cut.

Howard

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