What Cutting Oil To Use For Milling Mild Steel?

Check the label. Some tapping compounds are not recommended for power machining operations.

Cheers Phil
 
Check the label. Some tapping compounds are not recommended for power machining operations.

Cheers Phil
You are right ,the same applies to thread cutting oil also. the price difference is huge though, as video man says(post #9) , using tapping oil could be considered an overkill but for hobby use.in my case though a small can lasts a few months.
 
A big plus on Mobilmet 766 !!!

https://www.amazon.com/dp/B001VY3DJ...TF8&colid=2N1PWR8VSYL3O&coliid=I389PT37QWARAC

Not a bad deal from Amazon and free shipping!

I also use a product called Tapfree for drill and tapping, but I see that Amazon is not carrying this anymore.

https://www.amazon.com/Tapfree-Exce...e=UTF8&qid=1483916818&sr=1-2&keywords=tapfree
How do you like Tap Free Excel? I can get the 16 oz bottle in Canada for $17 and change.
http://iws.onlinesupply.ca/accessory-or-part/lubricants-spray-liquid/TF30316
 
I'm using a mini mill , it's not setup for coolant at all.
The only way a mixed coolant might work (hypothetically) is to put some in a spray bottle and spray it on the piece.

Don't do it, you will only make a mess, it does help however. I keep a spray bottle of coolant near a largish lathe that I often run, when one part is required and I am to lazy to set up the guards to keep the coolant from hitting the ceiling and co-workers, they find this impolite for some reason. A collet chuck eliminates much of the coolant flinging created by a scroll chucks jaws.

Set up a 1200 part job on a CNC chucker last week, 3/8" part in a 8" 3-Jaw with full flood coolant at 1500 RPM's, the operator came to me after an hour and told me that the machine was smoking. It wasn't but the big ugly chuck jaws turn the coolant into mist at that speed.
 
How do you like Tap Free Excel? I can get the 16 oz bottle in Canada for $17 and change.
http://iws.onlinesupply.ca/accessory-or-part/lubricants-spray-liquid/TF30316
I like the stuff for drill and tapping holes only. As wreck said, it gets messy using it for any other operations. I like the Mobilmet 766, fill an spill Mate with it and use an acid brush to apply. Use it mainly on the mill. On the lathe, use it for cutting threads primarily. I'll apply the 766 on the surfaces on the finish cuts on the lathe at times.
 
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I'm still working my way through a gallon of Mobil Mobilmet Omicron that I bought years ago. It's designed to be both a lubricating and cutting oil, sadly you can't buy it anymore. Supposedly Mobilmet 426 is it's replacement.
 
i use ATF (auto trans fluid) its 90 % mineral oil, works good in steel, i have a large supply of used from trans overhauls, ..pour it through a couple of shop towles,filter out most comtaninates..
 
i use ATF (auto trans fluid) its 90 % mineral oil, works good in steel, i have a large supply of used from trans overhauls, ..pour it through a couple of shop towels,filter out most contaminants..
Never thought ATF could be used for machining, someone mentioned I could use Remington gun oil! I still have a small bottle Hoppe's 9, maybe I'll give that a try.
 
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