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Thread: Quad Limb Assembly

  1. #1
    Administrator bfisher's Avatar
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    Default Quad Limb Assembly

    For Powerlineman83 and anybody else who is interested here are some pix of a Phantom X4 showing how the Quad limbs are attached. Notice it is quite different than the solid limbs using roto-cups. Roto-cups will not fit this style of riser nor will solid limbs. I started with a pic of the bow assembled and added pix in stages of disassembly. FYI, as quite common with Martin bows no bow press needed.
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    Last edited by bfisher; 11-07-2013 at 08:26 AM.
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    Senior Member wscywabbit's Avatar
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    Nice post Barry, thanks for sharing! The assembly sure makes more sense with the pics of it torn down.
    In God and guns we trust;
    • One nation, under God, indivisible, with liberty and justice for all.
    • A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.


    2011 Onza 3: 70#, 28.25 draw (AMO), 384 gr arrow, 288 fps
    2005 Saber: 70#, same arrow, 250 fps

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    Member Powerlineman83's Avatar
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    Thanks bub! I appreciate your effort!

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    Seems there are a couple ways the risers were built to use the Twin or Quad limbs.
    The Phantom X4 like Barry posted the pics of above use a flange machined into the riser itself to act as the spacer between the limbs with single 'pads' bolted on iether side for the limbs to rest on.
    On other models (pics are of my Alien X4) the riser is basically the same as the earlier solid limb risers except that with the Twin Limbs - the slot is machined into the riser and the alignment pin is in the 'roto cup'.
    Solid limb risers were opposite - pin was pressed into riser and slot was in the roto cup.
    Either way it makes it so that solid and Twin limbs only work on their respective risers.
    IMG_2086.jpgIMG_2077.jpgIMG_2081.jpg

  6. #5
    Senior Member GB3YO's Avatar
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    all of my 2012 bows r built the same way as this with the pin sticking out of the roto cup so I see no reason why a limb swap is possible same as above would just need some limbs and the new cup and it would be a direct swap
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    Interesting. The one '12 I have has the pin in the riser. Guess a swap may work depending on just what riser configuration you have...

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    Senior Member GB3YO's Avatar
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    IMG_20140113_081901_790.jpgIMG_20140113_082002_903.jpg
    As u can see this is the same assembly that's why I stated it was a good way to get rid of overstock.These pics r of my 2012 pantera and my others r the same.so a new cup and limbs would work.
    2012 Martin Cougar Fc
    2011 Martin Ridge Hunter turned Silencer
    2012 Onza Xt in the making
    2006 Martin Cougar 4se
    Fred Bear Grizzly @ 45lbs and Shakespear wonderbow @ 50lbs
    Love bows and everything bout bow hunting!!!

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    Administrator bfisher's Avatar
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    Good info here. I hadn't seen any bows with the alignment pin in the roto cup (rocker). Seems to me there were too many changes to the design in one year. One might work better than the other but it sure can be confusing to us consumers that mess around with our bows.

    GB3Y0, you just might be right that the quad setup would work, but I'd call Brandon and find out for sure.
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    Senior Member wscywabbit's Avatar
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    My guess would be that they were trying to move to quad limbs, and designed an intermediate fix to help use up riser stock on hand before they went to the permanent design....
    In God and guns we trust;
    • One nation, under God, indivisible, with liberty and justice for all.
    • A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.


    2011 Onza 3: 70#, 28.25 draw (AMO), 384 gr arrow, 288 fps
    2005 Saber: 70#, same arrow, 250 fps

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