making homebrew cutting fluid (short video)

A while back I looked at buying cutting fluid because using 3-in-1 oil seemed wasteful and WD40 is expensive. Cutting fluid is pretty cheap but I didn't want to pay for it, so I made some out of vegetable oil, water and detergent to mix the two together. No idea how this compares to the real deal but it is better than air.
Don't think 50/50 is the right ratio, but it is easy enough to invert the bottle and drain off the water from the bottom as the emulsion floats on top of it.

[@SteveJaeger]

Thanks for posting this video! I'm going to save it so I can make and use it when I need it.

[@xinixxagnix201]

i use 250 ml two stroke syntetic oil, 100 ml detergent and 100ml water, works very good.

[@ClownWhisper]

Why do you hate your tools cutting oils are not that expensive I get 2 gallons for under $20 from a production supply company it's fantastic cutting oil and it literally last me a couple years

[@lapislignum]

If I did more metal work I'd buy it, this works better than nothing I guess.

[@chodechotchney5331]

@@ClownWhisper check me out, I am the best and smartest. My decisions and actions are premium quality . I will make known unto all the others below me of how smart I am and how foolish and ignorant they all are. - clown whisper

[@alexandrucrisan1234]

Quite right! Plus, cutting oils are expensive for me, and generally they are not the best for your health either, especially chlorinated versions. But oh well, I guess some people do not consider the health/environmental implications of most brand cutting oils. I find this arrogance quite frustrating, particularly in older machinists who are very attached to their ways; not that they are not skilled though. @@chodechotchney5331

[@5jjt]

​@ClownWhisper What is the fluids commercial name?

[@rosivo3142]

im also wanting a non toxic cutting oil i can make at home. heard a whisper of a rumor about peanut oil........ sounds too good to be true (also problems with rancidity)

[@lapislignum]

Just try it, I think oils going rancid is only a problem when you put them on wood as it stays there and due to the porous nature of them. If you are after a finish on steel boiled linseed oil perks well, and you can even get anti-mould types.

[@rosivo3142]

@@lapislignum very nice advice, thanks. i love natural oils and would be so happy to be able to use them in the shop..

[@rosivo3142]

@@lapislignum and yes, i love boiled linseed oil on metal!

[@chevy6632]

I found peanut oil to be very good cutting oil, at least when drilling, flash point is quit high and I will also use it on my lathe soon with no worries at all.

[@cybermaus]

Ok, but how to prevent rust forming by the lingering water on the equipment? The workpiece is probably cleaned after, but the nooks and crannies of the machine?

[@ClownWhisper]

I prevent Rush by not using stupid gimmicks like this buy good products to take care of your tools and they will take care of you this is just stupid water vegetable oil and soap no I don't think so my tools are too valuable

[@SteveJaeger]

I worked in a machine shop making parts for aerospace. The cutting fluid/coolant was 4% mineral oil, 95% water, and 1% emulsifier. Never had a problem with rust once things were done being machined.

[@wimukthihashan5]

What pis liquids name u wher used

[@lapislignum]

vegetable oil, water and detergent

[@wimukthihashan5]

@@lapislignum thank u bro.i will shar u r chanle in whtspp

[@lapislignum]

Cheers!

[@claytoneytcheson8419]

i think i will try mineral oil in mine it wont get rancid.

[@lapislignum]

Should work fine, I didn't want to use motor oil at the time for some reason.

[@donnykiofetzis5775]

dose it work with salad dressing.

[@lapislignum]

Sure!

[@SmeeUncleJoe]

Why Rice Bran Oil ??.. That is hard to find and not one we'd use for other stuff.

[@lapislignum]

Just because it is fairly cheap and has a high flash point. YMMV

[@lapislignum]

Oh, I already bought it for heat treatment, otherwise I wouldn't care much about flash point

[@SmeeUncleJoe]

@@lapislignum Do we need a high flash point ? It is an aqueous solution. I would not know where to begin to look for that and I'll bet it's rarity would make it expensive.

[@lapislignum]

Just mix any oil with water and some detergent, if it looks milky it will lbw better than nothing. Or buy cutting fluid.

[@SmeeUncleJoe]

@@lapislignum I cannot just use regular cutting fluid as they use the same crap as in antifreeze and auto coolant. That splashes on my basement floor . My cats step in it, even when it's dry and then lick it off their paws. They then die a horrible death.