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.Check the label. Some tapping compounds are not recommended for power machining operations.
Cheers Phil
How do you like Tap Free Excel? I can get the 16 oz bottle in Canada for $17 and change.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
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.
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.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
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.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..