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Thread: DIY Stir plate question

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    Scuba_Steve's Avatar
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    DIY Stir plate question

    I am building a DIY stir plate rather than buying a speed stir. Why? I need it for homebrewing as well, and need a larger stir bar and probably more power than a speed stir will provide.

    I read somewhere that the replacement stir bars to buy for the TF-100 are 1". The sample container is only about 1 1/8" ID. Seems pretty close for comfort. Is this correct?
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    Richard320's Avatar
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    Re: DIY Stir plate question

    Yep. 25mm X 8 mm is the standard size for the speedstir. It's got a lip that centers the vials.
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    Mod Squad Bama Rambler's Avatar
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    Re: DIY Stir plate question

    There's not much room in the vial with the standard magnet. You can find magnetic stirrers for less than $70 on Amazon or EBay.

    I love the speed stir, but it's not a true stirrer as it doesn't have a spinning head to rotate the bar. It uses an array of three stationary electromagnets that cycle around to cause the bar to follow.

    I have an Apollo stirrer that has a rotating magnetic head that will spin a pretty large bar or cross and cause a tornado vortex in a pretty large beaker.
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