RADIAL PIN vs. 3/8-10 PIN

R

RSCA HOOLIGAN

AzB Silver Member
Silver Member
can you see the difference with the naked eye ?

Is it perfectly possible to screw a RADIAL PIN shaft on a 3/8-8 butt ?

i got two butts where i need to know what pin it is , i don't know how to post pics here but if someone can tell me by photo i can send a pic thru email .

Thanks Azer's .

Christoph
 
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RSCA HOOLIGAN said:
can you see the difference with the naked eye ?

Is it perfectly possible to screw a RADIAL PIN shaft on a 3/8-10 butt ?

i got two butts where i need to know what pin it is , i don't know how to post pics here but if someone can tell me by photo i can send a pic thru email .

Thanks Azer's .

Christoph
Click to expand...

Top is a Radial pin.....bottom is a standard 3/8-10. Do not try to interchange, that will not work.
 

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You will most likely not be able to tell without just trying to lightly thread it on. Do not force it and they are not interchangeable.
 
How to read a thread ( radial , 3/8x10 and so )

the radial pin and the 3/8x10 pin are part of the big pin family in my opinion along with other like the southwest pin . the way to read a thread by the numbers and see if it will fit goes as follows

example

3/8x10

3/8 is the pitch of the thread , the inclination.

x10 - how many threads are per inch. if you would take a 3/8x10 pin and cut exactly a inch you would have approximate 10 rotations or the thread.

as you can see from the picture about the 3/8x10 has a little more threads per inch then the radial pin which is approx 3/8x8. The pitch is the same but the number of threads is less.

other common threads are

5/16x18

5/16x14

southwest - 3/8x11 - same pitch more threads per inch.



so technically the pitch matches between the radial pin and the 3/8x10 pin the the number of rotations does not. if you try to screw it on and force it , eventually it will screw in but you will destroy the wood threads.


personally i love the radial pin - easy to install accurate as a cue maker and as a player i love that i have even more flat contact with the wood. my personal favorite.
 
Actually, the 3/8 denotes the diameter of the pin measured in inches. The pitch is 10 threads per inch.
 
Enigmaticul said:
the radial pin and the 3/8x10 pin are part of the big pin family in my opinion along with other like the southwest pin . the way to read a thread by the numbers and see if it will fit goes as follows

example

3/8x10

3/8 is the pitch of the thread , the inclination.

x10 - how many threads are per inch. if you would take a 3/8x10 pin and cut exactly a inch you would have approximate 10 rotations or the thread.

as you can see from the picture about the 3/8x10 has a little more threads per inch then the radial pin which is approx 3/8x8. The pitch is the same but the number of threads is less.

other common threads are

5/16x18

5/16x14

southwest - 3/8x11 - same pitch more threads per inch.



so technically the pitch matches between the radial pin and the 3/8x10 pin the the number of rotations does not. if you try to screw it on and force it , eventually it will screw in but you will destroy the wood threads.


personally i love the radial pin - easy to install accurate as a cue maker and as a player i love that i have even more flat contact with the wood. my personal favorite.
Click to expand...


Enigmatical, I think you've got a few things mixed up.

The 3/8 function is the diameter of the pin. It's not always exact, as the "topping" of the threads can take it down some. So, a 3/8" pin will typically measure somewhere from .365" up to .375" or so.

The 10 function is the number of thread peaks or valleys in 1" of length. So a 3/8-10 thread will have 10 thread in 1" of length, or 5 threads in 1/2" of length, etc.

The pitch is the length of 1 thread, or the distance the screw will move with 1 turn. The pitch is the number of threads per inch divided into that 1". So, for example, a 10 thread per inch screw will have a .100" pitch. There is .100" between each thread, and it will move .100" if you turn it one revolution.

For the OP, the only real difference between a 3/8-10 and a 3/8-8 is the threads per inch or the pitch. As Chris has already stated, just try to screw the shaft on lightly. If it start to get tight after about a 1-1/2 to 8 turns and just gets tighter, then you have the wrong one.

I hope that helps!

Royce
 
I honestly didn't know that it was truly a bad idea to try the off-shore 8TPI ballscrew tapped shafts on a butt with a true Radial,but knew it SOUNDED bad.

When doing the math on the real version vs the 8TPI,there isn't much of a difference. You're only talking .125 pitch vs .1309. An 1/8 radius gage ALMOST fits the real Radial perfect.

I wasn't aware that .0059 difference in the width of the cutter with a full 1/2 ball radius would cause that big of a potential problem. Tommy D.
 
so a RADIAL pin is in fact a 3/8-8 pin right ?

I have a picture of two cues with two different pins , is there anybody that i can send this picture to and can tell me what pins they are ?

Thanks ,

Christoph
 
RSCA HOOLIGAN said:
so a RADIAL pin is in fact a 3/8-8 pin right ?

I have a picture of two cues with two different pins , is there anybody that i can send this picture to and can tell me what pins they are ?

Thanks ,

Christoph
Click to expand...

What brands are the cues ?
Radial is less than 8 TPI.
Omega, Varner and Sledgehammer are some brands that used the 3/8 imported "radial" screws.
 
RSCA HOOLIGAN said:
so a RADIAL pin is in fact a 3/8-8 pin right ?

I have a picture of two cues with two different pins , is there anybody that i can send this picture to and can tell me what pins they are ?

Thanks ,

Christoph
Click to expand...



NO!

Radial is a trademarked name, and is the original ball thread screw made by the Uni-Loc company.

The 3/8-8 was first made overseas in Asia as a knock off on the Radial.

The funny thing is that the Radial has never been patented, so they could have just plain copied it completely. But, they thought they would get in trouble so they just made it different and called it Radial. Well, although the pin wasn't patented, the name was protected, so they couldn't call it Radial. So, we now have the 3/8-8 ball thread.


Royce
 
The real deal is 7.634 or 7.637 TPI.

Take any 1/4 shank tool or a 1/8 radius gage,and match it up just like you would with a thread gage.

You'll need a magnifier,but the gage or a 1/4 rod will fit the import screw dead-nuts. A real Radial will rock side to side a tiny bit,and will show itself under strong light. Tommy D.
 
JoeyInCali said:
What brands are the cues ?
Radial is less than 8 TPI.
Omega, Varner and Sledgehammer are some brands that used the 3/8 imported "radial" screws.
Click to expand...

a friend of me ordered 2 cues from a Philippines cuemaker and asked for the cues to be made with radial pin , the cuemaker sended a pic of the cues but i think they are not RADIAL .One of them sure isn't , the other one i think could be RADIAL or maybe 3/8-8 .
Now can you see the difference between these two ?
If someone gives me his email address i can send the pic .
 
I think if your friend lives in the US then that person needs to take those cues to a competent repair guy and have the pins switched out. Then have the shafts plugged and tapped for a real radial pin if they want to easily use an aftermarket shaft.

Sent from my XT901 using Tapatalk
 
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