TRIM Cutting & Grinding Fluids SC520/1 General Purpose Semisynthetic Fluid Concentrate, 1 gal Jug

Mixed 60 mL to 32 oz water. Working well on mild steel,aluminum and cast iron. Corrosion inhibitor works very well with no sticky residue on parts

Been using it for a while machine is not rusting

I read through some of the comments on the mix ratio and settled on trying 5 oz per gallon. Ran my mill in the evening and shut down. In the morning I came into shop and the mill had started to rust. I cleaned that up and increased my concentration to about 1/3 of a gallon of Trim to 4 gallons of water. That works pretty good but I still see a little bit of tendency to rust here and there. Thus I am going to use a full half gallon of Trim to 4 gallons of water. That might be a bit heavy, but rust is no fun! I spent about 20 years in the machine shop in one career. that ended in 1994. So I have seen my fair share of coolant. I would say Trim does a nice job and is pleasant to work with vs what we used back in the day. But do watch your concentration level! P

5 star product and seller.

Wide range of effective concentration. Stays emulsified well with intermittent use a few weeks in between. Has almost no smell and hasn’t cause any skin issues. Protects the metal well, the mild steel filings I left on my bandsaw have little to no rust which was surprising to me.

Wide range of effective concentration. Stays emulsified well with intermittent use a few weeks in between. Has almost no smell and hasn’t cause any skin issues. Protects the metal well, the mild steel filings I left on my bandsaw have little to no rust which was surprising to me.

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I dont see any rust anywhere for couple of days so thats good, but i suspect its only because of a high concentration recommended by the MFG. Something like 32 to 64 parts water kind weird number if you ask me, not exactly sure but its even more weird that this, trust me. Basically i ended up mixing 1 part solution to 2 parts water. I used distilled water just to be safe. Its cheap and clean. it sat for 3 days wet, no rust anywhere so i think we are good on rust concerns.

It’s probably because I don’t use my equipment regularly, and it’s not specific to this product but I’m done with water based coolants. They have all jammed my pumps with a waxy build up. It may work well if you use it every day but it’s absolute garbage if you’re a hobbiest who may let it sit for a week or two.

Does what you need it to do.