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Thread: RT Pro on/off pin length?

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  1. #1
    Cyco-Dude Guest

    RT Pro on/off pin length?

    so, according to this tolerance thread, the RT Pro on/off pin should be .765", whereas the ReTro, classic RT and X-valve are all .750".

    why is that? is this information accurate?

  2. #2
    Join Date
    May 2001
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    Quote Originally Posted by Cyco-Dude View Post
    so, according to this tolerance thread, the RT Pro on/off pin should be .765", whereas the ReTro, classic RT and X-valve are all .750".

    why is that? is this information accurate?
    Keep in mind the rail heights.

  3. #3
    Join Date
    Jan 2002
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    southern IL
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    My classic rt has a .744 on off pin in it. I've never manipulated it. And its not broke. That is how it came from the factory. My RTPro does have a .750

    I checked them recently because in the last 14 years I've not found a rtpro valve that RTs like my classic rt with the same bottle. So I decided to check my classic rt and my wife's RTPro. The pin length is the difference.

  4. #4
    Cyco-Dude Guest
    Quote Originally Posted by Dayspring View Post
    Keep in mind the rail heights.
    my rt classic and rt pro rails have the same height; ~.415.

  5. #5
    Join Date
    Oct 2002
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    I could be wrong but I thought the shorter pins were replaced with longer ones to extend the life of the sear.

  6. #6
    Join Date
    Jan 2002
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    Quote Originally Posted by smilestyler View Post
    I could be wrong but I thought the shorter pins were replaced with longer ones to extend the life of the sear.
    Probably a little. The shorter pins also makes them RT at lower pressures. Which in turn makes them rt faster at higher pressures. I'm still running the same sear that was in the marker when i bought it off its original owner in ???99???. Couldn't even guess how many cases have been fed through that gun. Was doing a case a week in it back in 01-02. 03-jan13 it sat dorment. I've probably put 7 or 8 cases through it in the past year.

  7. #7
    I'm not seeing how pin length is going to affect sear life. All other things equal, it has the same top force, translated to the sear, regardless of length. The pin is the hub of the three parts (sear, reg, dump chamber) of the firing system and as such effectively times the firing system. Longer pin reduces reactivity and moves toward the starvation end of the spectrum and shorter pin increases reactivity and moves toward the runaway end of the spectrum. But top force is top force.

    If there is something missing here, I'm listening closely.

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