All good ides and advice. I'd like to add more explicit explanatory
detail that is implicit in some of your advice. The problem is generally
that pressure from the sides distorts the thin metal towards an oval
shape, causing the ring to actually grip the threads to which it is
attached harder than at rest.
So you get into a vicious circle. The harder you grip, the greater the
self created friction you are trying to overcome. That's why the filter
wrenches are designed to grip the ring all the way around so as to avoid
distorting it.
I have usually found that applying pressure only on the front edge/rim
of the ring, perpendicular to the plane of it, and none at all against
the sides, will loosen a ring that is otherwise apparently really stuck
hard. It's can be quite amazing how a little persuasion, with a bit of
jiggling, rocking, etc., can gently remove a ring where brute force
applied in another direction cannot. This may apply to filters, as well.
Moose
Chuck Norcutt wrote:
> The best bet if you can find them are filter wrenches like these
> http://www.bhphotovideo.com/c/product/70726-REG/General_Brand__Filter_Wrench_48_58mm_Set.html
> Alternatively, as Frank recommended, any sort of grippy rubber might help.
> Rubber sheets for opening jar lids or to make non-slip or cushioned surfaces
> such as rubber shelf liners. Or snap a number of rubber bands around the
> ring.
>
> If that fails I'd try a worm gear type stainless steel hose clamp such as
> you'd use on an auto radiator hose. But I'd probably put some rubber bands
> underneath to serve as a cushion for the ring as these things are not
> perfectly round where the screw threads are. Pressure that is not uniformly
> applied around the entire circumference risks deforming the ring which will
> make the removal task that much more difficult as well
> as making it difficult to use the T10's threads afterwards
>
> If all else fails you can try cutting it off.
--
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