Pin and Thread Coverage

[cueman]

Normal 3/8-10 pins have less thread surface contact than Radial or Ball screw pins. This is because the Radial has rounded threads with tighter fit. Now the Southwest or Martin style of 3/8-10 pins have a flat minor diameter that can have a lot of thread surface contact also. This has become my favorite style pin in the 3/8 size. They are about three times the money of the standard 3/8-10 pins, but for precise shaft alignment or ease of installing in the butt centered and straight, they are hard to beat.

 

[GBCues]

Bob Dzuricky used to have a page on his website illustrating the difference. He has pulled it off, but was gracious enough to send me the picture. I think he will also add that page back into the website when he has a chance.

But you can readily see the difference here that Chris and others have been talking about.

Gary