3/8x10 Modified Pin question

cuehobby

cuehobby

AzB Silver Member
Silver Member
Will a 3/8x10 Modified Pin work on a Standard 3/8x10 shaft?
Or is it the other way?
Thanks in advance.
 
It really depends on how the shaft was threaded. It probably fits. You may need to run a .300" reamer through the shaft opening, but I've never had to do that unless the shaft was undercut for a tight fit on a 60 degree thread

I also have an ebony Titlist that can be converted
 
Exactly what ideologist said. It's more than likely not going to fit. The threading is normally different.

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Ideologist said "It really depends on how the shaft was threaded. It probably fits. You may need to run a .300" reamer through the shaft opening, but I've never had to do that unless the shaft was undercut for a tight fit on a 60 degree thread . . . . "
And to your point, the threading is exactly the same, 10 threads per inch. It is the minor diameter that is different, hence the possible need for a reamer.
My 2 cents,
Gary
 
GBCues said:
Ideologist said "It really depends on how the shaft was threaded. It probably fits. You may need to run a .300" reamer through the shaft opening, but I've never had to do that unless the shaft was undercut for a tight fit on a 60 degree thread . . . . "
And to your point, the threading is exactly the same, 10 threads per inch. It is the minor diameter that is different, hence the possible need for a reamer.
My 2 cents,
Gary
Click to expand...

To be a pedant, the threading is not the same. If you drive a tap in with a T-handle, the threads end up measuring differently than if you use live tooling.

I'd argue the different minor diameters are a result of different threading. Different pitch angles matter, and the insert material matters most.
 
The pilot on my 3/8 10 tap is only .295".
Modified 3/8 10 have .305 to .308 minors afaik.
.308 being a lot more common.
 
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