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You can mix your own dielectric fluid . All the ingredients are found home. Some where have mix for low cost dielectric fluid Dave

I rarely use EDM, despite having a small commercial machine! It always takes longer to set up than it seems like it should + it makes a mess. There's always a lot of dielectric fluid that gets

20 years ago I had no mill so had to use my lathe and a Aloris tool post and holder it work great . If did a lot would done more by using use tool holder and plate bolt to holder. I found this that

Add information on EDM tap removal to /g/7x12MiniLathe/files/6%29%20EDM%20drawings

davesmith1800 <davesmith1@...> added folder */6) EDM drawings*

You have Automovie Machine Shop do the work. Most today are for machining but ato shops use the lower cost ones. You can build one for a microwave transformer.? Very low cost just for taps. I started

"*Re: Using nitric acid to remove broken taps or drills from aluminum* From: davesmith1800

Like Miket_NYC said?It is very dangerous to use. If see cooking shower what them use liquid nitrogen it too in dangerous. Nitric acid is more dangerous. Use a EDM machine if do not have got to your

Mike, I bet your skin around the wound had some yellow stains. When nitric acid reacts with soluble proteins it produces xanthoproteic acid, which is yellow in color. I took my chemistry labs in the

"As a trained chemist I’ve needed to use con Nitric a bunch of times. You do have to be careful not to spill it on you because it promptly kills the nerves in your skin so you don’t notice it

No, the specific method I was talking about is for getting broken steel taps and drills out of ALUMINUM, not cast iron, like the bed of a minilathe. But maybe you could use acid anyway, which would

What percentage of nitric acid is required? I broke a M3x0.5 tap on my mini lathe doing a bed extension and could not get it out due to it breaking below the casting. I tried everything. I have time

Well I didn’t know the answer off the top of my head but Google does: "Although aluminium reacts with dilute nitric acid to produce aluminium nitrate and hydrogen gas, concentrated (>60%) nitric

The question was just technical. I’ve never needed to remove a tap. I would never use this method. But still, I wonder why the 66% concentration works where the more dilute does not. I’m guessing

Well put It some in welding you watch for . Why you can NOT use nitrogen for shielding. It could form in lungs Nitric acid That is ok in third world countries but not in America. Dave

As a trained chemist I’ve needed to use con Nitric a bunch of times. You do have to be careful not to spill it on you because it promptly kills the nerves in your skin so you don’t notice it

This is great news! Looks like I was wrong about the difficulty of buying nitric acid nowadays -- Walmart, with free shipping! Maybe the hysteria I found in the commercial shipping companies was only

I ways say away from?nitric acid. Just not need on self too. Dave

I found removing large taps and large bolts from casting and steel plate is easier than smaller sizes. EDM makes under 3/8" easy to do. Dave

I did not major in chemistry and only took the basic class that all science and engineering students take. So my understanding is that nitric acid would react with the aluminum. But you say that with