Forney 20857 Tap Magic Industrial Pro Cutting Fluid, 4 oz

Worth it, all day long. Not only lets you cut/drill faster - but your tool life will be dramatically increased. You can save a fortune on drill bits for the cost of a $10 can, not to mention loads of time. And this little can goes a long, long way. Get it and use it. In case you are unfamiliar, using it simply means putting a few drops between your material and tool. If you are say, drilling steel on a work bench or press, just squeeze a few drops right on the surface of the metal where you want to make a hole. If you are drilling horizontally (or even straight up) its easier to apply the fluid directly to the drill bit. If you see big chips flying (or even long strings of curly metal) you are doing it right. If you are only getting small flakes (or the sound of your drill switches to a high-pitched squeal instead of a satisfying metal chewing spin), stop and re-apply. Ideally you want to apply enough to avoid getting to that point, which you can learn from practice. Besides cutting faster (and burning up fewer bits) this stuff also helps avoid snags when drilling in metal which can shatter a drill bit. Really annoying to have to extract a hardened bit from a hunk of steel. Pro tip: when drilling through thick steel (say, thicker than 1/4) it helps to woddle the hole a little bit to avoid snags and jams. Thats a technical term. Make small (very small) circles as you drill. To summarize: worth every penny for drilling and cutting steel. Great for impatient metal workers.

Thats about it. Drilling metal? Use this! Anytime you look at a piece of stock and think Id tap that then break out the cutting fluid.

Longevity

gotta make sure you don’t go tappin the hole when dry , lube up!

Good product

Used to drill and tap various carbon steels and aluminum. No issues, worked as intended

good product

Must have when cutting new threads. Works great

The product works very well.....but it gave me contact dermatitis from a short secondary contact interaction. One of the chemical compounds (likely an amine) in this is high reactive and may cause skin inflammation that presents like hives. I am testing the products components for common fat soluble volatile compounds with NMR and GC Mass spec, not to mention bacterial contaminants from the alpha and beta bacterial families. It seems likely that the triethanol amine and also the trade secret amine complex is a candidate for the reactivity on skin. I personally think the manufacturer needs a stronger warning label on the product and/or more comprehensive saftey listings for proper handling, If you use this product I suggest you do NOT use latex glove as it can be porous and may not provide protection. Use nitrile based gloves when using this product. If you have any issue with this product , please apply cortisone to the localized skin affected areas and use appropriate amounts of antihistamine to reduce redness and swelling.

Drilling and tap threading is what I use it for and it works fine but I dont see that its any better than regular lube. It is convenient to use.