3/8-14 tap needed

nympfisher

nympfisher

SEMI AMATURE
Silver Member
anyone have a extra 3/8-14 tap they might wanna sell. i need to rethread a cutec shaft. dosent need to be in great shape, the insert is plastic and crossthreaded. the young ladies dad tried to use a 3/8 18 and its crooked.

thanks, Carl
 
nympfisher said:
anyone have a extra 3/8-14 tap they might wanna sell. i need to rethread a cutec shaft. dosent need to be in great shape, the insert is plastic and crossthreaded. the young ladies dad tried to use a 3/8 18 and its crooked.

thanks, Carl
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3/8-14 is the wrong size tap and will make the shaft fit loosely.

Dick
 
Buy the cheapest Cuetec cue you can find even used. And take the butt over to your grinder and grind a flat on each side of the joint pin and use it for your tap. Your fit will be perfect.
 
ok,, someone sais 3/8-14 is wrong . Chris says use a old but and cut thread relife slots in it (a old mechanics trick) . then someone actually found a tap that size (thanks by the way).

will a normal 14 pitch work ok ? this is my first repair and dont plan on working on too many cutec's if i can help it..

carl shealy
 
nympfisher said:
anyone have a extra 3/8-14 tap they might wanna sell. i need to rethread a cutec shaft. dosent need to be in great shape, the insert is plastic and crossthreaded. the young ladies dad tried to use a 3/8 18 and its crooked.

thanks, Carl
Click to expand...

E-mail KJ. He has the right ones for sale.
 
As Dick stated, the 3/8x14 tap is wrong for the CueTec.
It has the same pitch, 14TPI, but is too large in the diameter.
Dick is also correct in that the shaft would be extremely loose going on. Not a secure feeling at all.

A 5/16x14 tap may be used to straighten the crossed threads but it will not repair the damage that was done. There is a high likelihood that the shaft will cross-thread again.
If it were my task, I would install a phenolic insert which I would re-drill/tap for the correct fit.
I have taps in stock and could ship this week. Please PM for pricing.

PS, it just dawned on me that we're in the Machinery/Supplies section so I can quote a price.
$25 + s/h which is usually $3.50 w/insurance. Thanx Much.
 
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nympfisher said:
ok,, someone sais 3/8-14 is wrong . Chris says use a old but and cut thread relife slots in it (a old mechanics trick) . then someone actually found a tap that size (thanks by the way).

will a normal 14 pitch work ok ? this is my first repair and dont plan on working on too many cutec's if i can help it..

carl shealy
Click to expand...
IF KJ has them undersized get it from him. The one Luxe gave the link to is too large.
 
KJ Cues said:
As Dick stated, the 3/8x14 tap is wrong for the CueTec.
It has the same pitch, 14TPI, but is too large in the diameter.
Dick is also correct in that the shaft would be extremely loose going on. Not a secure feeling at all.

A 5/16x14 tap may be used to straighten the crossed threads but it will not repair the damage that was done. There is a high likelihood that the shaft will cross-thread again.
If it were my task, I would install a phenolic insert which I would re-drill/tap for the correct fit.
I have taps in stock and could ship this week. Please PM for pricing.

PS, it just dawned on me that we're in the Machinery/Supplies section so I can quote a price.
$25 + s/h which is usually $3.50 w/insurance. Thanx Much.
Click to expand...

This would be the correct tap for a cuetec shaft?
 
From what I've seen, a cue 3/8-14 is an Acme thread, so a 3/8-14 Unified tap would not work.
 
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if i have install a insert (it's plastic of some sort-not nylon or phen) then im probably better off buying a used shaft. this is the only cuetec i have been asked to work on, so i wasnt too keen on spending much on this cheap cue.
thanks for all the info, as usuall u guys are very helpfull.

carl
 
Joey is 1/2 right

JoeyInCali said:
Isn't that tap 9MM 1.25 ?
Click to expand...

That's not bad, better than being totally wrong, Lol.

A little insight for a better understanding.
1mm = .03937"
9mm = .35433"
I grind these taps to .359/.360 to allow for clearance.

As far as the pitch, metric taps have their pitch stated differently than SAE/American taps do. We measure pitch by threads per inch, TPI.
Metric tap pitch is measured by the distance btwn points/peaks of the threads (1mm, 1.25mm, 1.5mm, etc.). The CueTec pin is a true 14 TPI.
The closest to that in a true metric would be a 1.75mm. Mute point anyway because it's the wrong pitch by several thousandths.
A 9mm tap is not easy to come by but they do exist. I have a 9mm x 1.25 but it is way too fine for the CueTec. I've never seen a 9mm x 1.75 tap.

The CueTec is a real odd-ball in that it utilizes an American/SAE pitch with a metric diameter. This one boys & girls is a true bastard, though CueTec might refer to it as a 'hybrid'. Lol

Armed with the knowledge that I have just shared with you, you should be able to make this tap for yourself. 3/8x14 taps are readily available if you know where to look. I'm not looking to make a career of grinding custom taps but if for whatever reason you would rather have me provide a CueTec tap for you, I will continue to do so.
 
I HAVE A 9 1.25, its not even close. i took a 16 pitch and ground the tip so it will kinda drill out the insert straight. i did straighten the angle back so it screws together even(her dad tapped it by hand) , and there is enuff thread so it's tight.

so unless she wants to buy a shaft thats the best i can do. she is not that good a player so i doubt she will even care.

thanks alot

carl
 
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