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Thread size for the CSUSA Precision Vacuum adapter stem

P

Paulloseby

Joined
Nov 21, 2006
Messages
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Location
Leicester in the middle of the UK
Website
www.loseby.co.uk
Could any one of my US cousins help me please? I changed lathes last year and the Craft Supplies Precision Machine Rotary Vacuum chuck adapter no longer fit. I did manage to get a new stem from them which fit with plenty of packing of tape etc.

I have turned a replacement stem of the right size ready to screw into the adapter but I need to know the male thread size. I can get a suitable die - if I know the right size. I don't have a USA thread pitch gauge and the machine shops are all closed here because of the lockdown.

The attached picture is of the current adapter stem with the thread size I need, marked with the red arrow. If anyone could enlighten me, I would be really grateful.

Many thanks, kindest regards and above all, stay safe and healthy
 

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