Leadscrew drifting out

[DanielParticipant @daniel]

Hello Everyone,

I had a rather disturbing issue manifest itself today.

I had decided to cut a screw thread (M10x1.5). Taking cuts of 0.02mm each pass, the thread gave the appearence of forming well. Then, after maybe 4 or 5 passes, I noticed the thread was looking less well.

Being me, I continued regardless, until it became abundantly clear that no thread was going to get formed. It started to look like some very bad turning.

On inspection, I see that the leadscrew has worked itself outwards, towards the tailstock; enough to have popped off the plastic end cap.

The lathe is a Warco GH1322 and was new 12 months ago.

In fairness, I have not yet contacted Warco.

Does anyone have any ideas ?

Thanks in advance,

Daniel

[DanielParticipant @daniel]

[Gray62Participant @gray62]

Sounds like the drive pin at the headstock end has either sheared or fallen out. On my Warco GH1330 it is a brass taper pin and it has come adrift in the past.

[DanielParticipant @daniel]

Hi Graeme,

That might explain the 2 brass pins that came in the toolbag ; their application hitherto unknown

What kind of job was it to access the pin ?

[DanielParticipant @daniel]

Posted by Graeme W on 01/12/2016 18:29:14:

Sounds like the drive pin at the headstock end has either sheared or fallen out. On my Warco GH1330 it is a brass taper pin and it has come adrift in the past.

Graeme,

Sincere and heartfelt thank's for the pointer.

You were absolutely correct.

All repaired and ready to move on to the next learning experience

Thank's again,

Daniel

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