I've bought a power hacksaw and spent a couple of weeks stripping it rebuilding and converting it to single phase. I finally got round to making some proper cuts with it today, but have a question on what coolant to use. The machine has a suds tank in the base that holds about 5 litres and since I don't plan on using the machine that often, maybe once every couple of months I bought a can of neat "cutting fluid" from machine mart thinking this would be preferable to soluble oil. However it has a (unpleasant to my nose!) strongish smell of sulphur (I think?) and is so thick it barely dribbles out. I don't want to use soluble oil as I'm very worried by the water content and it growing things due to the low usage, but have heard that sticking an air pump in the tank helps a lot? Also there is a oil resovoir on the arm for lubricating the slides, do I have to use a special slideway oil or will any oil suffice e.g. engine oil?
Many thanks Graham