what is the gab on ball joints's purpose ?

Discussion in 'Transformers 3rd Party Discussion' started by Lightningsonic, May 6, 2021.

  1. Lightningsonic

    Lightningsonic Well-Known Member

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    So i see some of the part that have a hole like this. I wonder what is their purpose ?
    Is it have something to do with the air ? like let the air escape outside when you put the ball joint on.
    This is not always the case in every toy, some have this, some don't.
    There are also a toy i have and they have some tiny hole in the ball joint it self and not the part you put the ball joint in.
    Could it be with air it effect the friction ? or companies just simple want to save some gram of plastic ?
     

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  2. marvel b

    marvel b Bearer of the Matrix of Smash

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    I always believed it's for disassembly/reassembly purposes when it's returned to the factory for fixing. Not sure if true tho.
     
  3. Megawillbot

    Megawillbot Well-Known Member

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    The injection mould is only two halves- the hole is so it can shape the inside of the bumps that hold the ball in the socket
     
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  4. Girl Pants

    Girl Pants aka brickonator

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    I always assumed it played two roles:
    - to allow airflow so that the ball never gets a "vacuum seal" in the socket, preventing it from coming out
    - to allow a space where the joint can flex so that it can deform slightly rather than crack (there are similar ideas in bones/joints in biology)

    But I'm not an engineer, so I these are assumptions.
     
  5. bellpeppers

    bellpeppers A Meat Popsicle

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    I’m guessing ‘stress relief’ openings.
    Otherwise @Megawillbot might have it.
     
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  6. Scourgatron

    Scourgatron 4D Smart-ass

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    Flex

    /thread