How To Tighten Loose Cap's Rings ?

[fabri00]

Thanks everybody for the help, and Happy New Year!

I agree the use of a collect chuck seems to be the best solution,

Howewer, I did a ring in delrin, of the same diameter of the ring groove in the cap, and same width.

I cutted in 2 half rings the first one i did, but it was difficult to keep in the right position the pen ring and the 2 half plastic rings.

I machined a new ring of the same size, and I cutted it only once. Then I shrincked it with a plyier more times, from gently to stronger, and turning the plyiers in order to apply the pressure in different points.

It worked not perfectly but quite well, even if the pen I tested has a very loose ring.

I think this could be a reasonable solution for this issue, in particular if the ring is not so loose.

See the picture here below:

 

[Ron Z]

This is the tool I did already some time ago:

 

The 3 wheels shrink the ring, while the cap is turned by hand. the pressure is slowly increased turning the knob with the screw.

The body of the pen should be tigthly screwed in the cap, in order to not break it while increasing the pressure.

It works well but only with thin rings, and not too loose.

 

I take back my original comment. That won't work - it'll stretch the ring, not compress it.

[Chrissy]

 

I take back my original comment. That won't work - it'll stretch the ring, not compress it.

 

I must admit I thought I had to be wrong when I thought that.

[fabri00]

I take back my original comment. That won't work - it'll stretch the ring, not compress it.

it is not true, as for rings not too loose it work well.

But it not work for too loose rings, that why I wrote here to find another solution.

And apparently I found it, as for the post above your.