3/8x10 modified pin question

oneshotwiss

AzB Silver Member
Silver Member
Does anyone make a 3/8x10 aftermarket shaft that is tapped to be compatible with a 3/8x10 modified pin? Predator, OB or Tiger?
 
Most 3/8 10 shafts will fit a modified pin without any further work needed.

Larry
 
Most 3/8 10 shafts will fit a modified pin without any further work needed.

Larry
I recently ordered a pair of rosewood joint protectors in 3/8x10 for an OB modified pin, and it wouldn't fit the pin. The pin screwed in maybe 2 threads and bound up. I maybe could have forced it to cut the threads but decided to return the jp's and buy OB ones.
 
I recently ordered a pair of rosewood joint protectors in 3/8x10 for an OB modified pin, and it wouldn't fit the pin. The pin screwed in maybe 2 threads and bound up. I maybe could have forced it to cut the threads but decided to return the jp's and buy OB ones.

My McDermott shafts won't fit the OB butt either. I just learned about the "modified" 3/8-10 just a day or so ago when I first screwed the OB together and noticed how well it located with practically no play. I think the minor diameter is larger. So I guess that's good because you can ream out the standard 3/8-10, which will have no real effect on the regular 3/8-10 joint, but yield a tight fit on the modified.

Is that true? Can I really just ream a regular 3/8-10 and have it end up where it's interchangeable on either butt, or will it screw up the fit on the regular 3/8-10 joint? I'm hoping I can use my old McD shafts as backup shafts for the OB.
 
My McDermott shafts won't fit the OB butt either. I just learned about the "modified" 3/8-10 just a day or so ago when I first screwed the OB together and noticed how well it located with practically no play. I think the minor diameter is larger. So I guess that's good because you can ream out the standard 3/8-10, which will have no real effect on the regular 3/8-10 joint, but yield a tight fit on the modified.

Is that true? Can I really just ream a regular 3/8-10 and have it end up where it's interchangeable on either butt, or will it screw up the fit on the regular 3/8-10 joint? I'm hoping I can use my old McD shafts as backup shafts for the OB.

Yes, from my understanding, you are correct on all accounts. My question is, if a shaft that is tapped to fit a 3/8x10 modified will also fit a cue with a standard 3/8x10 pin then why aren't these aftermarket shaft companies just tapping all of their 3/8x10 shafts to fit the modified pin due to the popularity of its use or are they?
 
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Thanks At Large, the was quite possibly the best, clearest, most concise answer pretty much ANYONE could EVER ASK FOR!!!. So anyhow I'm still confused lol!!! What I got out of that was so there is several thousands of an inch difference with a slight variation at the top of the pin???

I thought that was the only difference at first as well because my regular Predator shaft will thread on it but comes up about 2 threads short of seating against the butt. That is why I thought my Carmeli had a 3/8x11 pin. The craziest part is if I lay my 2 Carmelis next to each other, the pins look identical as far as the minor diameter but one appears to be longer. My Predator threads on the cue with the shorter pin just fine
 
Yes, from my understanding, you are correct on all accounts. My question is, if a shaft that is tapped to fit a 3/8x10 modified will also fit a cue with a standard 3/8x10 pin then why aren't these aftermarket shaft companies just tapping all of their 3/8x10 shafts to fit the modified pin due to the popularity of its use or are they?

I have to whip out my chart, but I have a feeling that McD doesn't bore the hole to the proper tap size...which somewhat doesn't matter because I'm certain they're not actually running a tap down the hole. They're going to be threading it on the lathe, maybe even with live tooling. Actually, tightening up the hole a little bit allows for better thread engagement, so there's a reason to do it like that.

Anyhow, my McD is an old D series, and they have a good bit of variability and hand work done on them. Who the heck knows what they did. Out of 100 shafts, 50 might fit, and 50 not from those days.

My understanding at the moment is if the hole is bored anywhere from the proper modified size up to the nominal tap drill size, the shafts should be interchangeable.
 
Why do people always have to try and reinvent the wheel? What was wrong with the standard 3/8x10 pin setup that has been used for years that they had to go and design a 3/8x10 modified pin?
 
Why do people always have to try and reinvent the wheel? What was wrong with the standard 3/8x10 pin setup that has been used for years that they had to go and design a 3/8x10 modified pin?


I suppose if there was no innovation the game MAY not develop. IMO the equipment we use today is far superior than yesteryear and most of use like trying new stuff to make our hobby more enjoyable.

My current player is an OB (modified pin) but I can't say it has improved my game compared to other pin types, I have used. It's just progress I guess and not everyone will agree.


Sent from my iPhone using Tapatalk
 
Why do people always have to try and reinvent the wheel? What was wrong with the standard 3/8x10 pin setup that has been used for years that they had to go and design a 3/8x10 modified pin?

Have you felt how the modified 3/8-10 engages yet? It eliminates a ton of shaft play. If nothing else, the joint's going to last a lot longer. My McD wobbles all over the place as I'm assembling it, and it hasn't gotten better with age. :) The modified will located the shaft far more precisely too, but honestly I don't know how much that really matters. What's the difference if the shaft is off just a little bit? Big deal.

But it really is an improvement, and this is coming from a guy who's been shooting with the same two cues all his life.

I'll tell you why McDermott won't ever change to it, and I'm a big McDermott fan and have played McDermott's all my life. For whatever reason, even with CNC machinery, they have crap for precision at their joints. If you're going to engage on the minor diameter, you'd better get everything dead straight and flat because it's like indexing on a pin. If you're off a little bit, there won't be a ton of play for the shaft to simply locate flat on the joint face.

The Uniloc joint has this problem too. If the joint collars aren't dead flat and perpendicular to the pin, it will rattle apart as you play.
 

Thank you AtLarge. Bob D explained the difference very clearly and it all makes sense why the modified pin is superior to the standard pin. Since my older Predator shaft wont fit my cue, I guess my question is this, after reading the last statement in Bob's explanation, did the aftermarket shaft makers (Predator, OB, Tiger) catch on to the modified pins popularity and start drilling their new version shafts to.3125" so they will fit the modified pins?
 
All great points John C and as I stated I am now educated to the advantages of the modified pin thanks to Bob D
 
Thank you AtLarge. Bob D explained the difference very clearly and it all makes sense why the modified pin is superior to the standard pin. Since my older Predator shaft wont fit my cue, I guess my question is this, after reading the last statement in Bob's explanation, did the aftermarket shaft makers (Predator, OB, Tiger) catch on to the modified pins popularity and start drilling their new version shafts to.3125" so they will fit the modified pins?

Anyone? Anyone? Where is Royce on this one as I am really curious as to what OB is doing?
 
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