A vise can do more

[Frank S]

Another simple tip to clamping conical shaped parts in a vice, be it a band saw a drill press or a mill, these puppies are a real bear to hold. My solution is I find a humble thick washer with the same outside diameter as the largest diameter of the part in question, then bore the center to fit over the part so as to have 2 supports then I could drill mill or saw where needed.
If the part was short I sometimes add a stop block behind the part to prevent it slipping backwards.