Installing Radial Pin

Yeo

Yeo

Lousy Pool Player
Silver Member
I understand that radial pin are installed with the self-centering portion fully submerged in the wood like in picture A.

radial_pin.jpg


I did an experiment, in picture B, I keep half of the self-centering portion exposed, and this part will go into the shaft when tighten.

I feel this way the joint is stiffer and stronger.

But there must be a reason why radial pin is done like picture A and not picture B.

May I know what are the cons of doing it as in picture B?
 
i am guessing you cut the top of the pin off and the only negative i could see is that maybe you don't have enough pin in the butt of the cue.looking at you setup i would guess you have 1" buried and i like to have closer to 2".
 
Big con (besides losing that alignment barrel for the pin to sit in the forearm..)
of B is you will have to bore the shaft .370-.371" by the length of that pilot.
 
masonh said:
i am guessing you cut the top of the pin off and the only negative i could see is that maybe you don't have enough pin in the butt of the cue.looking at you setup i would guess you have 1" buried and i like to have closer to 2".
Click to expand...
Hi, yes, I cut the top of the pin or else it will be too long.

I have about 1.5" buried in the forearm.
 
JoeyInCali said:
Big con (besides losing that alignment barrel for the pin to sit in the forearm..)
of B is you will have to bore the shaft .370-.371" by the length of that pilot.
Click to expand...

Hi, Thank You.

I also feel that these are some of the biggest cons..

And there are not enough threads for tightening...

I didnt bore the shaft at .370", I only bore it at .360" for the first .5" of the shaft, and force the pin in to get a very tight fit. But I believe this is good enough to weeken the shaft.. :smile:

What if I only expose about .100" of the barrel instead of the current .500"?

Will this improve the alignment of the joint since this alignment barrel is meant for the alignment into the forearm?
 
Yeo, the faces have to be dead square on the two faces.
If the bored hole of the shaft is off, that alignment barrel won't make a difference.
The outsides of the two pieces will be off by a bunch if that's the case.
 
Yeo said:
Hi, Thank You.

I also feel that these are some of the biggest cons..

And there are not enough threads for tightening...

I didnt bore the shaft at .370", I only bore it at .360" for the first .5" of the shaft, and force the pin in to get a very tight fit. But I believe this is good enough to weeken the shaft.. :smile:

What if I only expose about .100" of the barrel instead of the current .500"?

Will this improve the alignment of the joint since this alignment barrel is meant for the alignment into the forearm?
Click to expand...
A properly installed Radial pin will provide all the alignment that is necessary all by itself. I don't believe that repositioning of the barrel will provide any greater alignment and may actually cause problems.

The fact that you are deliberately going for an interference-fit btwn the pins barrel and the shaft causes me concern. .010" is extreme and is just begging for disaster. Please do not try this on a collar-less laminated shaft (OB, Pred. etc.). You may not like the outcome.
 
Hi JoeyInCali and KJ Cues,

Thank you for your advices!!

I understand now. :smile:
 
You must log in or register to reply here.
Back
Top