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  1. #1
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    Mainspring data thread

    Hi chaps,
    Following on from Jim Tyler's excellent and thought provoking thread in this month's Airgun World Technical Airgun Series relating to the merits of longer, narrower gauge mainsprings, we thought a thread listing the specifications / dimensions of numerous mainsprings would provide a useful reference point.

    If we can compile enough data for different springs, this thread could then be transferred over to the Useful Tips section, providing a handy reference for future use / comparison.

    So, if lots of people could possibly contribute, this would provide a very useful database for various different springs. This would provide the option to experiment and also to match a spring to a gun, once internal dimensional requirements are known.

    Details required ( please feel free to include as much information as possible, especially if I've omitted anything), please provide information such as:-

    Make of spring, eg V-Mach, Titan, Vortek, Maccari, standard fitment etc.
    Length
    Pitch
    Number of coils
    Outside diameter
    Inside diameter
    Spring rate
    Wire diameter
    Known fitment applications

    Jim, please feel free to edit/alter as desired.....

    Thanks in anticipation for all your help/input.
    THE BOINGER BASH AT QUIGLEY HOLLOW. MAKING GREAT MEMORIES SINCE 15th JUNE, 2013.
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  2. #2
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    Spring rate?

    I know what is is but never seen it quoted on an air rifle mainspring.

    To be honest it's the crux. Spring rate is the key to all this tomfoolery

    Matty
    Opportunity is missed by most people, because it is dressed in overalls and looks like work.

  3. #3
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    Quote Originally Posted by MattyBoy View Post
    Spring rate?

    I know what is is but never seen it quoted on an air rifle mainspring.

    To be honest it's the crux. Spring rate is the key to all this tomfoolery

    Matty
    The spring rate is important, Matty, but it's only part of the mix.

    What's most important is the amount of energy that the spring makes available to the piston (total energy minus energy in preload), the static force (the force on the piston in the 'at rest' position), and the force on the piston at the point of release. For any given spring, all of these will vary according to the piston stroke length and preload length.

  4. #4
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    Jim, i would just edit it to get the info into the first post maybe...

  5. #5
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    Quote Originally Posted by bigtoe01 View Post
    Jim, i would just edit it to get the info into the first post maybe...
    If the thread grows as I hope, Tony, there could be too much information for that. Let's see how it goes.

    Anyone looking for specific information, say on Titan springs, or spring for a particular airgun, can use the 'Search this thread' option to find what they want.
    Last edited by T 20; 07-03-2018 at 04:11 PM.

  6. #6
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    posted this in the other thread...will place it here also

    Titan springs grouped by wire size.

    [CODE]

    Model # OD ID Wire Coils Length
    TS001 21 14.5 3.25 31 280
    TS003 20.8 14.73 3.26 34 304
    TS009 21.35 14.75 3.3 27 280
    TS010 21 14.8 3.1 27 230


    TS005 19 13.19 3 32 290
    TS006 19 13.3 2.92 39 341
    TS007 20 13.8 3.3 30 255
    TS008 20 13.8 3.3 34 295
    TS011 18.8 12.8 3 31 230


    TS002 22.7 15.5 3.65 30 291
    TS004 22.62 15.64 3.65 28 252
    TS012 22.8 15.6 3.65 41 410

    [/CODE]

  7. #7
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    Thank you tone. You're a star.
    THE BOINGER BASH AT QUIGLEY HOLLOW. MAKING GREAT MEMORIES SINCE 15th JUNE, 2013.
    NEXT EVENT :- May 4/5, 2024.........BOING!!

  8. #8
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    Walther LGV spring

    I like this spring..a LOT, if Walther will push LGV spares into the UK I for see this spring being used in many project guns.

    Specs are:

    236mm long, 3.35mm wire, 20.8mm OD, 14.4mm ID, 3.96mm between coils, 33 coils.

    If the rifle you are tuning is optimised this spring will deliver 11fpe in .177 with ease with just 34CC of swept volume and the shot cycle is supreme. Its a soft spring due to the 33 coils but packs a nice punch.

    Titan should make a copy of this one

  9. #9
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    I think this thread could be even more useful if people post the spring specifications (and where people can obtain one) that suited a particular gun, and put the year, model and calibre of gun in the thread title.

  10. #10
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    Quote Originally Posted by BTDT View Post
    I think this thread could be even more useful if people post the spring specifications (and where people can obtain one) that suited a particular gun, and put the year, model and calibre of gun in the thread title.
    Spring recommendations for specific guns are not always the best option. Several springs may be recommended for a gun but what is reguired is one that is the best fit inside the piston. If there is too much gap between the piston and spring a severe twang can be the result so beware and always measure the piston inner diameter before ordering a spring.

  11. #11
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    Quote Originally Posted by bigtoe01 View Post
    I like this spring..a LOT, if Walther will push LGV spares into the UK I for see this spring being used in many project guns.

    Specs are:

    236mm long, 3.35mm wire, 20.8mm OD, 14.4mm ID, 3.96mm between coils, 33 coils.

    If the rifle you are tuning is optimised this spring will deliver 11fpe in .177 with ease with just 34CC of swept volume and the shot cycle is supreme. Its a soft spring due to the 33 coils but packs a nice punch.

    Titan should make a copy of this one
    Re-reading this statement Tony... define 'optimised' here. I think you said it didn't work well in a TX. Just not enough room in that gun to pre-load it properly? What kind of rifle would it be good for? I ordered one of the 16J kits from Germany and I'm going to test the piston in my TX but would like to hang onto the spring if there is a good use-case for it. Maybe an HW95 at 12fpe? At 34CC would a .22 be best?
    Good deals: davida6212 jimmer u.k.neil

  12. #12
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    Which of these look promising for a TX200 sub 12fpe with short stroke?

    I currently have the QX4600 - in a gun with Mk1 stroke it's up near 11.7 ft lbs with no top hat and no spacers....just custom guide. So there really is no spacing option. It would be nice to be able to adjust pre-load some more...I can't go up with this one. The piston is lightened as well.

    Here are some other Maccari springs that I can easily source here in the U.S. (some may not fit the TX factory guides though and will need custom ones):

    QX4600 spring 32 coils x.120" wire - ID .560 set
    http://www.airrifleheadquarters.com/...88/7905117.htm

    R6 Ultra XLD spring 30 coils x .120" with .530 ID
    http://www.airrifleheadquarters.com/...88/1979288.htm

    E9870 Euro Universal spring 39 coils x .120" wire 480" ID - 13" OAL
    http://www.airrifleheadquarters.com/...88/6825218.htm

    E8700 mini spring .105 wire, 29 coils, ID .555" 10" OAL
    http://www.airrifleheadquarters.com/...88/5730289.htm

    Merlin XL spring - Square wire, figure it at .116" average, .509 inch ID., 37 coils and 12.2" plus unset.
    http://www.airrifleheadquarters.com/...88/4452198.htm

    E3200 spring 32 coils, .110 wire, ID .540 inch - Unset 12" OAL
    http://www.airrifleheadquarters.com/...88/7908088.htm

    Merlin Mini Mag spring 29 coils x .110 round wire x .545 ID
    http://www.airrifleheadquarters.com/...88/9682441.htm
    Good deals: davida6212 jimmer u.k.neil

  13. #13
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    Quote Originally Posted by bigtoe01 View Post
    posted this in the other thread...will place it here also

    Titan springs grouped by wire size.

    [CODE]

    Model # OD ID Wire Coils Length
    TS001 21 14.5 3.25 31 280
    TS003 20.8 14.73 3.26 34 304
    TS009 21.35 14.75 3.3 27 280
    TS010 21 14.8 3.1 27 230


    TS005 19 13.19 3 32 290
    TS006 19 13.3 2.92 39 341
    TS007 20 13.8 3.3 30 255
    TS008 20 13.8 3.3 34 295
    TS011 18.8 12.8 3 31 230


    TS002 22.7 15.5 3.65 30 291
    TS004 22.62 15.64 3.65 28 252
    TS012 22.8 15.6 3.65 41 410

    [/CODE]


    Got this off a bagnall and kirkwood listing



    Model Outer (mm) Inner (mm) Thickness (mm) No. Coils (mm) Length (mm)
    No. 1 21 14.5 3.25 31 280
    No. 2 22.7 15.5 3.65 30 291
    No. 3 20.8 14.73 3.26 34 304
    No. 4 22.62 15.64 3.65 28 252
    No. 5 19 13.19 3 32 290
    No. 6 19.7 13.3 2.92 39 341
    No. 7 20 13.8 3.3 30 255
    No. 8 20 13.8 3.3 34 295
    No. 9 21 14.75 3.3 27 280
    No. 10 21 14.8 3.1 27 230
    No. 11 18.8 12.8 3 31 230
    No. 12 18.912.6 2.9 36 295
    No.13 19.4 13 3.1 39 340

    No.14 22.7 15.4 4.12 37 356

    No.15 17.53 12.1 3 33 254
    Hatsan 19.55 13.4 3.0 37 310mm

    5/25 12.5 9.5 1.6 28 240mm
    Last edited by hmangphilly; 01-05-2017 at 08:42 AM.

  14. #14
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    grr spent ages getting those spaces too

  15. #15
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    Thank you for that updated information.
    THE BOINGER BASH AT QUIGLEY HOLLOW. MAKING GREAT MEMORIES SINCE 15th JUNE, 2013.
    NEXT EVENT :- May 4/5, 2024.........BOING!!

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