[modeleng] Re: Stuck threads

Tim Hi,
If you try with some WD40 and some heat from a hairdryer working it in both 
directions,do you have any access to any freezer spray i have found that 
sometimes that works,if the two parts were of differing metals you might be 
able to try heat on one and cold on the other.
you might if it has picked up try drilling some very small holes from the outer 
ring to just touch the inner thread.
Fine threads if they distort are sometimes very hard to separate.
Good luck

Regards John Burridge


> Message date : Feb 22 2005, 03:06 PM
> From : "Tim Rickard" <the_viffer@xxxxxxxxxxx>
> To : modeleng@xxxxxxxxxxxxx
> Copy to : 
> Subject : [modeleng] Stuck threads
> 
> I'm not certain if this is off topic or not. If it is OT please excuse me.
> 
> I've dropped a (Pentax 35mm) camera lens. With any luck the elements have 
> not been displaced and at any rate there is no cracking of them. However the 
> filter has deformed and will not now unscrew. WD40, Plus-gas or caustic soda 
> are obvious no-nos. Anyone any ideas? The thread is 40mm-ish by 1mm pitch & 
> both the lens and filter are some kind of light alloy.
> 
> 
> MODEL ENGINEERING DISCUSSION LIST.
> 
> To UNSUBSCRIBE from this list, send a blank email to, 
> modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject 
> line.
> 
> 

-- 

Whatever you Wanadoo:
http://www.wanadoo.co.uk/time/

This email has been checked for most known viruses - find out more at: 
http://www.wanadoo.co.uk/help/id/7098.htm

MODEL ENGINEERING DISCUSSION LIST.

To UNSUBSCRIBE from this list, send a blank email to, 
modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.

Other related posts: