Defy CF shaft Question!

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Rjmoncrief

AzB Silver Member
Silver Member
I just picked up a new McDermott Defy CF shaft with a 3/8x10 thread. I’m going to use it on my Schmelke Cue. Here’s my question..... The shaft is very tight going on the Schmelke 3/8x10 pin. I mean very tight.
I was a little hesitant putting it together the first time. I’d screw it on a little then work it back and forth. Then a little further, etc., etc. I took my time and finally got it put together fully. Should it be that tight going on? The Defy threads are plastic so will it loosen up after a while?
Any info appreciated!
Thanks
 
Could it be that the shaft is a 3/8-10, and the pin is a 3/8-10 modified? Different minor diameter. Or worse, the shaft was not a 3/8-10 to begin with.
 
I haven't had issues putting stock 3/8-10 defy shafts on other 3/8-10 butts. Looks like the existing pin might be the issue.
 
briankenobi said:
I haven't had issues putting stock 3/8-10 defy shafts on other 3/8-10 butts. Looks like the existing pin might be the issue.
Click to expand...
I just noticed you said Schmelke. There was a time when Schmelke had some 3/8x10 screws made where the pitch between the threads was thicker. But not as thick as the modified 3/8x10 screws.
 
briankenobi said:
I haven't had issues putting stock 3/8-10 defy shafts on other 3/8-10 butts. Looks like the existing pin might be the issue.
Click to expand...
I also have a McDermott with the 3/8x10 and it’s just as tight on it. I don’t want to damage a new CF shaft. Suggestions?
 
briankenobi said:
I haven't had issues putting stock 3/8-10 defy shafts on other 3/8-10 butts. Looks like the existing pin might be the issue.
Click to expand...
I also have a McDermott with the 3/8x10 and it’s just as tight on it. I don’t want to damage a new CF shaft. Suggestions?
Thunder Thighs said:
Could it be that the shaft is a 3/8-10, and the pin is a 3/8-10 modified? Different minor diameter. Or worse, the shaft was not a 3/8-10 to begin with.
Click to expand...
Thunder Thighs said:
Could it be that the shaft is a 3/8-10, and the pin is a 3/8-10 modified? Different minor diameter. Or worse, the shaft was not a 3/8-10 to begin with.
Click to expand...
Cue is a Schmelke, definitely a 3/8x10.
I also have a McDermott with the 3/8x10 and it’s just as tight on it. I don’t want to damage a new CF shaft. Suggestions?
 
Rjmoncrief said:
I also have a McDermott with the 3/8x10 and it’s just as tight on it. I don’t want to damage a new CF shaft. Suggestions?


Cue is a Schmelke, definitely a 3/8x10.
I also have a McDermott with the 3/8x10 and it’s just as tight on it. I don’t want to damage a new CF shaft. Suggestions?
Click to expand...

As Mike said, get the shaft tapped. Did you contact McDermott to tell them what is happening? I've had a few shafts over the years that needed a bit of coaxing to fit properly. Have you done it a few times already? A small amount of lubricant on the threads may help till it loosens up.
 
hang-the-9 said:
As Mike said, get the shaft tapped. Did you contact McDermott to tell them what is happening? I've had a few shafts over the years that needed a bit of coaxing to fit properly. Have you done it a few times already? A small amount of lubricant on the threads may help till it loosens up.
Click to expand...
Thank you as always.
Here ya go. Show them this. They're all different sizes.
 

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Rjmoncrief said:
I just picked up a new McDermott Defy CF shaft with a 3/8x10 thread. I’m going to use it on my Schmelke Cue. Here’s my question..... The shaft is very tight going on the Schmelke 3/8x10 pin. I mean very tight.
I was a little hesitant putting it together the first time. I’d screw it on a little then work it back and forth. Then a little further, etc., etc. I took my time and finally got it put together fully. Should it be that tight going on? The Defy threads are plastic so will it loosen up after a while?
Any info appreciated!
Thanks
Click to expand...
My friend's Defy shaft was the same way..It was SUPER tight....He tapped it out and it was fine..He called McDermott and they said they made them that way on purpose so they wouldn't fit loose...
I have had other cues that fit really , really tight and I rub candle wax on threads, screw it in and do that about 3 times and it loosens up but is still tight but not as bad..
 
When I first put mine on it was super tight...It will loosen up after putting it together and taking it apart a few times. I did not put any lubricant on it.
 
I would get it tapped...

Had a super-highend McDaniel with a big pin and solid ivory joint.

The shafts were a very tight fit.

I kept forcing them down until the joint eventually cracked.

I was so angry that I sold the cue for next to nothing.

Bad things can happen if you try and force it.
 
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