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    Boat shaft connectors (which stuffs to use and which is good)
    by Sakibian πŸ‡§πŸ‡Ή ( Master Seaman)
    πŸ“£










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    15 Posts 14 Replies 14 Photos 19 Likes
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    Sakibian
    Master Seaman
    πŸ“ Boat shaft connectors (which stuffs to use and which is good)
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    Country: πŸ‡§πŸ‡Ή Bhutan
    Online: 5 months ago
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    Hey Dodgy, thanks for the idea number 3, I will surely try that! And I hope this will work insha allah!
    And those links will be very helpful. I hope those silicone are strong πŸ’ͺπŸ’ͺ
    1
    TheBlacksmith
    Able Seaman
    πŸ“ Boat shaft connectors (which stuffs to use and which is good)
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    Country: πŸ‡¬πŸ‡§ United Kingdom
    Online: 22 days ago
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    The couplings you appear to have are noisy as they are built to rather generous tolerances but if you can find a piece of rubber of a sufficient diameter you can cut a narrow band and put it on the coupling at the point where the pins are. I used this method on my converted Southampton and it is still going well with a much, much reduced noise level
    1
    DodgyGeezer
    Sub-Lieutenant
    πŸ“ Boat shaft connectors (which stuffs to use and which is good)
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    Country: πŸ‡¬πŸ‡§ United Kingdom
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    1 - I concur with figtree7nts. You don't want a long length of unsupported floppy tube transmitting power. You will see that my illustrations show the unsupported tube to be very short.

    2 - You also want thick tube to transmit power. if you have thin 2-3mm tube that will easily kink. I make my own connectors at the ends of each shaft to bring the internal tube diameter up to about 6-8mm.

    3 - if you want to try a quick fix for what you have, I would suggest putting a small piece of wood or plastic inside the unsupported section of your tube, which will stop it collapsing when it is twisted. This may work if the torque is not high. And it's a quick, cheap thing to try.

    4 - if you want to try making your own, you could get something like this - check the correct shaft size - https://www.ebay.co.uk/itm/Brass-Hexagon-Flexible-Coupling-C...

    or this: https://www.ebay.co.uk/itm/Coupling-Inserts-for-RC-Models-Va...

    and then buy a length of something like this - https://www.ebay.co.uk/itm/1M-Food-Grade-Clear-Translucent-S...

    checking the diameters that you need, of course...

    Here is a similar Eezebilt to your craft. it's the OSA Missile boat. You can see that the unsupported length of silicone is short, and this boat at 32 inches takes quite a lot of power...
    https://www.ebay.co.uk/itm/Brass-Hexagon-Flexible-Coupling-Coupler-Connector-Motor-Model-Car-Boat-3-8mm/302549582190?_trkparms=aid%3D555017%26algo%3DPL.CASSINI%26ao%3D1%26asc%3D20170221124951%26meid%3Ddc345e0eff7a498aaf6d1efe0039d818%26pid%3D100643%26rk%3D1%26rkt%3D1%26%26itm%3D302549582190&_trksid=p2045573.c100643.m3226
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    https://www.ebay.co.uk/itm/Coupling-Inserts-for-RC-Models-Various-Sizes-available-RC-Model-Boat-Fittings/322996589219?_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D1%26asc%3D20170920101022%26meid%3D7c9c41e4b98047af9227e21aef42a96e%26pid%3D100010%26rk%3D4%26rkt%3D9%26sd%3D191479721852%26itm%3D322996589219&_trksid=p2047675.c100010.m2109
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    https://www.ebay.co.uk/itm/1M-Food-Grade-Clear-Translucent-Silicone-Tube-Beer-Milk-Hose-Pipe-Soft-Rubber/253549582415?hash=item3b08bb984f:m:mLOWX25B4-LemH4pL11iYfA:rk:12:pf:0
    πŸ”—
    4
    Sakibian
    Master Seaman
    πŸ“ Boat shaft connectors (which stuffs to use and which is good)
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    Country: πŸ‡§πŸ‡Ή Bhutan
    Online: 5 months ago
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    Thank you Ed! I will try better this time. This helped me a lΓ²t, learned some great stuffs. I will show you when I do that!
    figtree7nts
    Commodore
    πŸ“ Boat shaft connectors (which stuffs to use and which is good)
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    Country: πŸ‡ΊπŸ‡Έ United States
    Online: 3 hours ago
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    Hi Sakibian,

    Why don't you push the motors closer to the shafts!
    Maybe this will help with the misalignment of the shafts!
    Or even try to move the motors so they do align!

    Cheers, Ed
    2
    "Fair winds calm Seas" 73's
    Sakibian
    Master Seaman
    πŸ“ Boat shaft connectors (which stuffs to use and which is good)
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    Country: πŸ‡§πŸ‡Ή Bhutan
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    Thank you dodgy!! I needed this. I was always telling myself that a slight misalignment is okay bcz I'm going to use flexible coupler, so it's okay.
    There I might have done something wrong!
    Can you please give me the link,of that silicone tube that your using? Or I mean what kind of tube they are, where they are used😊
    And yes I ment a lot vibrations by earthquake. Sorry for that.
    At first I used some thin silicone tubes also, they weren't great.🀐
    1
    Sakibian
    Master Seaman
    πŸ“ Boat shaft connectors (which stuffs to use and which is good)
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    Country: πŸ‡§πŸ‡Ή Bhutan
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    This is the boat I was trying to finish, Ed! I'm not very accurate at these so I face this problems. I'm quite young so when I build, I do hurry sometimes. I think this is my biggest fault when I do modeling.
    The motor shaft is 2mm and the drive shaft is 3mm.
    Thank you for the link ! Can you help me a bit more to know which size they Are? I can't find anything about the hole size they are havingπŸ€”
    1
    figtree7nts
    Commodore
    πŸ“ Boat shaft connectors (which stuffs to use and which is good)
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    Country: πŸ‡ΊπŸ‡Έ United States
    Online: 3 hours ago
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    Thanks DodgyGeezer,

    That was Coupler was what I was looking for.
    As a recommendation to Sakibian!
    But couldn't find it!

    Sakibian,

    Should deffinately use a coupler like that!

    Cheers, Ed
    1
    "Fair winds calm Seas" 73's
    DodgyGeezer
    Sub-Lieutenant
    πŸ“ Boat shaft connectors (which stuffs to use and which is good)
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    Country: πŸ‡¬πŸ‡§ United Kingdom
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    I'm not sure what you mean by 'earthquakes' - do you mean there was lots of vibration?

    The prop-shaft and the motor shaft should be aligned as precisely as you can manage. Though a universal joint will accept some misalignment, you should aim to get things so precise that there is no need for a joint!

    That tube looks rather thin. I use tube which is 10-12mm in OD, with about 3-4 mm thick walls. You are correct that I 'make the shafts larger' by putting little knurled knobs made from aluminium bar on them. if you do not have a lathe, you can buy similar couplings like this: https://www.cornwallmodelboats.co.uk/acatalog/Robbe-Flexible...
    https://www.cornwallmodelboats.co.uk/acatalog/Robbe-Flexible-Coupling-3.2-4mm-R1445.html#SID=1586
    πŸ”—
    1
    figtree7nts
    Commodore
    πŸ“ Boat shaft connectors (which stuffs to use and which is good)
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    Country: πŸ‡ΊπŸ‡Έ United States
    Online: 3 hours ago
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    Hi Sakibian,

    Why can't you use couplings from Cornwall Model Boats!
    https://www.cornwallmodelboats.co.uk/acatalog/Universal-Joint---Red-MA5000.html#SID=737
    Maybe you can take a picture of your project to show us.
    What you are working on!
    I think the shaft should be close to the motor.
    Or the rubber hose will tear!
    Try looking for plastic tubing.
    Of the diameter you need!
    Or harder rubber tubing....


    Regards, Ed
    https://www.cornwallmodelboats.co.uk/acatalog/Universal-Joint---Red-MA5000.html#SID=737
    πŸ”—
    2
    "Fair winds calm Seas" 73's
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