Drilling and threading lube

redvan22

H-M Supporter - Sustaining Member
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Aug 5, 2018
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Hi,
What type/kind of oil should be used for general drilling, tapping and treading?

Mike
 
Ive used to use tap magic but I tried some butter cut and I’m really like it it’s kimda hard to get around here locally
 
Pretty much any cutting oil will work. I consider tapping and threading to be high pressure conditions so I use sulfur-bearing cutting oil. This is available at your local hardware store.
 
I like a castor oil base. Been using CRC TrueTap lately. I put it into squeeze bottles with a needle tip and a neodymium magnet inside the bottle to keep it in place at the machine. It's good for tapping and cutting and goes a long way.

(from mobile)
 
I;ve recently found that Relton's A-9 is even better than Tap Magic (aluminum) for drilling holes smaller than .040 in Aluminum. Tap Magic broke drills, A-9 doesn't. I'mnot sure that the same is true for larger drill/tap sizes.
 
I use Magic Tap for all my machining where a cutting oil is required.
 
Rigid Dark Cutting Oil works for all but aluminum for me
 
I've been using CRC Truetap, and have been very happy with it, its thick and stays where you put it.
 
Wow, thank you all very much.
 
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