3/8 10 or 3/8 radial

[rogerb]

Hi, I need to get an extra shaft for a Carolina Custom... I have someone telling me this is a 3/8 10 and another telling me no it's a radial .. I know ya'll will can let me know .. Thanks

http://gallery.me.com/rogerbressette#100133/IMG_0376&bgcolor=black

 

[Big_mike]

looks like 3/8 10 to me. but im no pro..

 

[Tony_in_MD]

Modified 3/8 10.


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[rogerb]

Modified ... ? so a 3/8 10 shaft will work (predator, etc)

 

[ridewiththewind]

Here's a nice pic showing a comparison of the two:

 

[sfleinen]

Modified 3/8 10.


Sent from my iPhone using Tapatalk.

Here's a nice pic showing a comparison of the two:

These replies are spot-on. Notice in the OP's picture that, for lack of a better term, "lands and grooves," the "grooves" are squared -- flat bottoms. By way of comparison, the Radial pin has perfect concentric grooves cut into the pin. The "lands" cut into the shaft's wood are perfect half-rounds, while the modified 3/8-10 have flattened tops.

Although I'm a fan of the Radial pin, the modified 3/8-10 is a neat design, because 1.) it attempts to achieve the same consistent wood-to-metal contact without gaps as the Radial pin, and 2.) you can take a shaft that was cut for a standard 3/8-10 and "modify" the existing pin hole to accept the modified 3/8-10 by simply drilling-out the existing pin hole with a slightly larger bit to flatten the tops of the existing threads in the wood.

-Sean

 

[sfleinen]

Modified ... ? so a 3/8 10 shaft will work (predator, etc)

Not necessarily. That is, unless the existing 3/8-10 (standard, not modified) has been so well used that the threading has been worn down enough to accept the larger "rod" part of the pin. ("Rod" meaning if you were to shave-off the threads down flat to the underlying rod.) The Modified 3/8-10 has a larger rod than the standard 3/8-10.

Normally, existing 3/8-10 (standard-cut) shafts would need a slight modification to accept a Modified 3/8-10 -- they would need to be slightly drilled-out to flatten the tops of the wooden threads inside the shaft.

-Sean