1. #1
    im using a pond pump which is a high flow pump but minimal pressure and its very weak

    the bottle neck is the actual spindle 3kw

    i like to change to a gear type pump that has a bit of pressure to it, any recommendations ?

    (i have cleaned the spindle out, taken out the connectors , but there is nothing obvious blocking it)

  2. #2
    If you use a better pump then the small pond pump, like a coolant pump with 200W or so, thats enough for your spindle.
    Depending to the manufacturer you need a rustprotection in it and the liquid must have not less then 18C or similiar to use.
    I recommend a small liquid cooler from a watercooled Computer or small motorcycle to cool down the warm water.

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