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Old 10-13-2009, 06:53 PM
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Drilling/Tapping Fluid

Learned years ago that brake fluid is an excellent drilling & tapping fluid if you ever run out of your normal stuff you use. Actually works better than any other fluids I have tried. Give it a try and post what you think.

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Old 10-14-2009, 12:30 AM
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I've given it a try, nothing tops Rapid Tap IMO. Particularly in SS or TI.

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Old 10-14-2009, 10:05 AM
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I use whatever I got available at the time. brake fluid, tranny fluid, motor oil, gear oil, liquid soap, bearing grease, ect... all seems to work just fine
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Old 10-15-2009, 10:39 AM
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Quote:
Originally Posted by matt167
I use whatever I got available at the time. brake fluid, tranny fluid, motor oil, gear oil, liquid soap, bearing grease, ect... all seems to work just fine
I never seem to have the right stuff, so WD-40 usually gets it done here...

Russ
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Old 10-15-2009, 10:54 AM
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Quote:
Originally Posted by S10xGN
I never seem to have the right stuff, so WD-40 usually gets it done here...Russ

WD40 is primarily a solvent and is a relatively poor lubricant.



Quote:
Originally Posted by Matt167
I use whatever I got available at the time. brake fluid, tranny fluid, motor oil, gear oil, liquid soap, bearing grease, ect... all seems to work just fine

The key word here is "seems", A true tapping fluid works MUCH better. Bearing grease and liquid soap may seem like they are working ok at the time but using products like that leads to dulled and broken taps and dies along with galled and roughly cut threads.


I have never tried the one 4 Jaw mentions but I use "Tap Magic" which works really well also plus there are others available any of which are a lot better than lubricating oils/grease or soap.
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Old 10-15-2009, 11:06 AM
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Quote:
Originally Posted by oldred
WD40 is primarily a solvent and is a relatively poor lubricant.






The key word here is "seems", A true tapping fluid works MUCH better. Bearing grease and liquid soap may seem like they are working ok at the time but using products like that leads to dulled and broken taps and dies along with galled and roughly cut threads.


I have never tried the one 4 Jaw mentions but I use "Tap Magic" which works really well also plus there are others available any of which are a lot better than lubricating oils/grease or soap.
yea, normally I use motor oil or trans fluid. but yea, I'v used dish soap cutting diffrent threads in nuts when I don't have them with the right thread. and the soap is what's close
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Old 10-15-2009, 11:19 AM
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I prefer Mystic Metal Mover for threading and plain ol Lard for drilling.
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Old 10-15-2009, 11:47 AM
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Quote:
Originally Posted by matt167
yea, normally I use motor oil or trans fluid. but yea, I'v used dish soap cutting diffrent threads in nuts when I don't have them with the right thread. and the soap is what's close

I know one guy who uses anti-seize and swears it is better than anything he has ever used to cut new threads with, I have never tried it so I don't know but I suppose it is at least better than nothing. I do most of my drilling on a drill press or in my lathe both of which use the same water soluble coolant and it seems (there's that word again ) to work better than oil, but then I have never tried that same fluid when manually drilling.
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Old 10-15-2009, 11:51 AM
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Quote:
Originally Posted by oldred
WD40 is primarily a solvent and is a relatively poor lubricant. ...
Agreed! But, it is better than nothing, I've tried both...

Russ
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Old 10-16-2009, 02:03 AM
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This can has been w/me for years. Nothing like the correct "tool" for the application. I would hesitate to use brake fluid or soapy substances for the simple reason they promote rust.

Besides the lack of true lubrication, brake fluid (non silicone, at least) softens/removes paint- another downside.

I would use motor oil if I couldn't use tap fluid, I suppose.
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Old 10-16-2009, 05:37 AM
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Another vote for rapid tap. Great stuff. The only other fluid I have used is pipe treading cutting oil
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Old 10-16-2009, 06:21 AM
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my vote is for tap magic too. i have used it alot with great success. i like the smell too.hahaha, smells like cinnamon
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Old 10-16-2009, 07:16 AM
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Tap Magic, Rapid Tap and Do-All Tapping cream all are commercially available and work well for most steel.

Tap Magic also manufactures a 'cutting fluid' for aluminum.

Kerosene is very good for aluminum. Most tapping compounds will turn aluminum black in color if the compound is not cleaned off very quickly after being applied.

White lead and red lead is excellent but was banned many years ago due to the lead content.

Bacon grease (pure lard) also works excellent but can get rancid over time.

Using sharp cutting tools is very important as well. With some brands of taps when used in smaller sizes in tool steel with high chromium content, you may only get one hole per tap before the tap is too dull to be used safely without it snapping off. i.e. S10 tool steel with any tap below 1/4" diameter.
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Old 10-16-2009, 07:51 AM
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As an aside, white lead has been banned from paint, etc. for a while now. I donít know if itís available as an individual compound or not.

Red lead (shown on Right, below) is readily available from pottery suppliers in powder form, so it must be mixed if one were to want to use it as a tap lube (I would NOT recommend this!).

Metallic lead in suspension is available from NAPA and others as an anti-seize compound. Odd that the weight is shown as 1 LB or "45.3 GR". If they meant grams, that would be closer to 453.6g (usually rounded up to 454g).
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Old 10-16-2009, 08:21 AM
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Ace hardware sells cutting oil that works well something I have used for years . Is easy to find, no need to waste your time looking for some of these secret formula banned products that the internet mechanic above suggest .. just googleing in front of a computer all day .... cutting and pasting in NOT a valid resource although that individual thinks in his head he is ..... oh well
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