I've recently got my hands on a large clarke bandsaw and i was wondering what would be the best coolant to use?. I mostly would cut mild and stainless steel.
To be honest, the cheapest stuff will be fine, the expensive gear is for pro CNC machines, just buy the cheapest you can, at the end of the day all you need to do is stop the blade getting warm.
We buy 25L for around 20 quid; 1:10 dillution with water.
Most stuff now is anti fungal so mushrooms don't grow in the drip tray