Comments on old school collar work on shafts

[Newton]

I have a customer asking me to customize his shaft with a fat collar. In other words much wider/higher than the normal design.
My reply was "sure" but then it struck me after thinking this through, do I weaken the shaft in it's joint area?
He's talking of having a collar as wide/long as the radial joint screw holding shaft and butt together.

Any one got the same question and in case what did you do?
The collars on the old school cues was as I remember it designed this way. Old McDermotts and Hueblers at least - remembering back to my early days in the 80s.

Any comments would be appreciated.

K

 

[cueman]

If you run the collar all the way back to where the screw ends in either the butt or shaft you will be creating a weak point. I would say half way to where the pin would end in either the shaft or the butt would be the maximum length collar to use and maintain the strength you would want.

 

[Cue Crazy]

The longer you go, either the sidewalls of the collar get thinner, the Tenon gets smaller, as well as the OD of the shaft itself, or all of the above, so I would think yes It would weaken It if you go too long, but if your going past the open cavity of the pin bore, then not sure what effect that would have or if It would be of any help, because you still loose a lot of the OD pretty quickly with Most tapers, and that's got to made up from either the tenon diameter, the side walls of the collar, or both combined. either way Your thinning everything out the longer you go with it.

You may could get away with It and it could hold up fine depending on how long you need to go, but I would have to think that It would be weakened quite considerably just the same. Also with the cavity for the radial pin being so large, that's gonna have some effect as well, both in tenon size, and thinning/weakening the side walls.

 

[Newton]

Thanks Chris and Greg,

It seems like we think the same and I would judge what to do.
The reason the customer whant's a collar is that the custom cuemaker delivered his cue without any colar. The cue has a OB1 shaft so I mentioned that having a laminated shaft without a collar could cause it to crack or split in it's end.
However, the shaft has been coned in it's thread end, it's not simply faced as normal. So the shaft is touching only on the outside-some mm in from the O.D.
A little strange for me, but I gues the cuemaker have had his reasons...

Thanks for the feedback guys.

Kent