Testing a portable high power broken tap remover (SFX-4000B)

By Grover Koelpin 52 comments

A Chinese company with a hard-to-pronounce name thought it would be a good idea if I tested their EDM Machine After that googling EDM I agreed. Because who doesn’t want to play with a spark generating metal vaporising machine So here it is. The SFX-4000B high power broken tap remover And it’s actually their high-end model the low
power EDM-8c would be a better fit for my little channel But hey I’m not complaining, it’s a free power toy It’s actually not completely free. A couple of
weeks after I received the machine the department of revenue sent me an invoice Apparently I owed them some VAT (or BTW as we call it over here) and import tax And it doesn’t matter that I didn’t pay for the machine Now if you’re the kind of person that jealous right now… That’s okay you’re only human But if you’re the kind of person that jealous
and wants to leave a nasty comment Then I have to ask you to kindly piss off! So now I have to make a video about this machine a review And to be honest I don’t know the first thing about an EDM machine But I will read the manual and try to sound smart. I guess But the good thing, is I’m not getting a paid for the job and I didn’t signed any contract. So basically I can do what ever I want with this machine But I did agree to highlight a short list of talking points There you go, So with that out of the way let’s make a video. and have some fun It’s obvious I didn’t do an unboxing video
I think unboxing videos are the work of Satan. And generally pretty lame There’s some real garbage out there. Especially those done by the Apple fanboys that seem to drule over a bit of packing material Having said that, this machine
was very well packaged It was double boxed and well protected for the rough journey from the east to the west And, since nothing fell out and nothing was
rattling my first impression was pretty good This leaflet was the first thing I got my hands on. And it was good for a nice laugh At first glance there’s nothing wrong with his promotional document Both machines are on the front and the work-head. A nice starburst for some special effect And apparently the company has a ISO certificate. 2008 I see. That for quality control. And the machine comes with a CE certification and that basically means that the machine complies to the rules of the European market. Thats all very nice. Here they compare the features of both machines And these illustrations give you examples on how to set up the machine You can use it on the side and even upside down if you got the tap stuck in the ceiling Here are the different electrodes and how you use them to vaporize bolts and taps So far nothing wrong with this document. Not even a bit of Chinglish. But then we get to the back of the document And the first thing we see is one of their
machines being smashed with Thor’s hammer And at this point I’m thinking WTF!. What company in their right mind puts a picture of their flagship product being smashed to pieces on a promotional leaflet But it gets better and if you read the text Apparently if the machine doesn’t work you’re supposed to tell them and then make a video of the machine being smashed So now I’m thinking double what the fuck!! Are they actually asking for videos of their
products being smashed apart Do they know where those videos usually end up?? I found is a very odd promotional piece. That is supposed to convince me of the quality of their product and service And I think I know why they are doing this. They don’t have a global network of service engineers so it’s easier to refund the machine than to hire a local technician But to ask for a video, I don’t know… And what about refunding VAT and import taxes? Or perhaps getting a replacement machine? Personally I don’t think this is the best way of doing things, but it sure is original On the other hand I searched and didn’t find
any videos of these machines being smashed up So either they haven’t sold any or they all work fine. You decide. In any case I am fully prepared to make the
first EDM smash video Here’s the user manual. No need to look at it, since I’ve already read the PDF version And usually the printed version is older than the electronic version I found the user manual readable with only a small Chinglish percentage. But it isn’t all that comprehensive and rather short but the illustrations are pretty good I actually got some extra info and tips on
how to use this machine from video the company has on YouTube I will put a link in the description below the video There’s also a cd-rom here but unfortunately I cannot use it Since I replaced the cd-rom drive in my
computer with an extra hard drive to store video footage These here are all the accessories that come with the machine Everything you need to start vaporizing taps and bolts of all sizes And all this is actually stored within
the machine. on the back of the machine here’s a nice little glovebox to store all accessories They actually mention this glove box in the leaflet. Accessory storage, one in box Personally I’m not that impressed I would rather have a separate tool box like the EDM-8C apparently has. Because once all this is unboxed, and used it will be hard to fit everything back inside that little glovebox And without packing material things will start to move on to rattle And not to mention water that might have been left behind inside the water pump I don’t think it’s a good idea to get water inside a machine like this This machine isn’t that heavy but with a separate toolkit for the accessori es it’s even lighter And you’ll have something in the other hand to keep you in balance Maybe a padded watertight and removable tray on top of the machine might be a better idea. If you ask me So what do we have here, there’s a big ass
mag-base all kinds of electrodes A coolant water pump a drill chuck to hold
the electrodes The working head that will automatically lower and raise the electrode And some cable and coolant lines I will set this all up and I guess then it’s time to generate some sparks but first I need to prepare the test subject When I agreed to test this machine I asked for some taps Because I didn’t want to break any of my own tap and die set So they provided me with some big-ass taps. Bigger them I’m used to using And for some reason they marking have been ground away But after measuring and a bit of googling I now know that this is a m20 tap with a 1.5mm pitch And I need to drill a 18.5 mm hole And that’s way too big for my little drill press so I prepared this piece of steel in my lathe So let’s put this in the vise and see if we can break it This cuts easier than expected must be a
good tap Lets break this thing As far as I can remember I’ve never broken a tab in my whole damn life
about to change And I’m hoping that’s about to change. Otherwise I’m looking pretty silly here with this big hammer HaHah, easy That looks like a nice clean break. The rest
of the tab didn’t shatter Let’s go to the SFX-4000B and make some sparks This is a reasonably sized tab has a pretty solid core And I could probably spark through the core using this hex electrode Or maybe this round one will even fit But it’s probably better to use this blade type of electrode and spark away two of the flutes And hopefully then the rest will come out I’ll borrow your crapper for a while if that’s okay So here is my setup, it smells a bit funny but lucky for you guys that won’t show up on camera I got a steel plate in here and that’s for the mag-base to hold on to With the weight of the mag-base it is already surprisingly stable even without the steel plate Of course that would change if you use the work-head on its side I’ve set the processing depth of the work-head to just under the four centimeters There’s about 32 millimeter of the tab left so this should be enough to disintegrate the flute I used the square to line up the electrode. The machine actually comes with this little bubble level And you can use that on top of the work-head but in this case I’m not tall enough to look onto the bubble level from above But a square should be good enough besides with the tab this big there is some margin for error T here’s an F clip on the test piece it’s only there to give this red electrode clamp something to hold on to The work piece is not fixed in place but I think it’s heavy enough that it will not move The water pump over here is fixed to the kitty crabber with four suction cups And to protect it from swarf coming from the metal vaporising I will throw in a couple of these coat hangers with magnets they might just extend the life of the water pump a bit but in any case the machine comes with a spare water pump In case the water pump craps out in the Kitty crapper So now I only need to add some water and we should be ready to go This is a tap water especially made for
vaporizing taps Although distilled water is actually
more efficient. Without any minerals the water isn’t conductive and less power
will be wasted when the sparks Bridge the gap between the electrode and the work piece Well let’s switch on the machine and see
if we can make some sparks The on/off switch is on the back by the way Now I’m going to follow a procedure that
I’ve seen on a YouTube video First I switch on the water pump Well that works I’m going to raise the workpiece a
little so the water can escape underneath Alright let’s try that again Much better High frequency – Servo – And there it goes I wasn’t expecting the machine to start
immediately. I thought I had to press the down button It looks like those first sparks took out a chunk of the electrode And that was only while running in the low power mode I doubt that I can use this thin blade like
electrode in high-power mode But, I will probably try anyway So lets start over I increased the speed of the water pump Now I’m going to press the down button see what happens There it goes I’m slowing down the servo Let’s flood everything Increasing the speed of the servo when I switched the machine on the first time the servo dial was set to 12 o’clock That’s here Aha, that’s the right setting. Finally stability The water is slowly turning black and I doubt those coat hanger magnets will have any effect Well let’s switch the water pump off up again And there it is, black swarf I think we’re close to the end. Things that should destabilize when the electrode comes through There’s three millimeters of travel left on the workhead According to the scale that is on there If I set the depth correct we should be
through the flute now But I don’t see things destabilizing Any moment now it’s going to hit the
limit stop And it’s coming up now This here is the underside of the tab
and as you can see all floats are still there And that’s because a large part of
the electrode got vaporized And that probably happened at the beginning when things weren’t stabilized So I’m going to grind a bit off and try again I’m ready to start vaporizing the second flute In order to set this up. Although at the moment it seems to be settling on the bottom I’m now going to flood things again Let’s see if we can vaporize this second flute without any problems water pump – high frequency – servo -down down much more spark this time maybe that’s because there’s less water And things are dest abilizing again And again it goes off I’m carefully turning the servo knob in both directions. but……. Finally With a little bit more experience this should go easier . Ha! Now we wait I’ll leave the camera running, see how long this takes I think I’m going to get a cup of tea
now, this will take a while So that’s another failure the same
result is on the first flute I’m pretty sure it’s the operator’s fault not the machine But the good thing is I now still have two complete clothes left to experiment on And I think what happens here is some electrode material vaporizes And the opening starts to get slightly tapered towards the bottom And then at some point the electrode and the tab come in contact And the servo motor starts searching for a better position By moving the electrode up and down and this all gets worse as the electrode gets deeper and deeper And more and more of the electrode vaporizes It also doesn’t help that the electrode is a lot
wider than the piece that needs to come off Maybe a tapered electrode that is a bit thicker on the bottom and might fix the problem But this machine also has a patented vibration option it basically vibrates the electrode And that results in a larger opening
and that might fix the problem. So let’s try that out All right now I’m going to process flute number three and this time I will be
using the vibration function high frequency – servo – vibration I can actually feel it through the table It’s not really pleasant. It’s a pretty annoying But some people might like it Al right pushing down We need more water Turning up the servo It’s a lot easier to find the correct
setting now Well you don’t want to switch that off That’s done Switching off vibration Damn bubbles Nah, I think there is still a bit of the electrode missing Still not all the way through and the
electro – looks basically the same Although there might be a little less
wear on the side here But about the same amount of material got lost So at this point I’m thinking it’s probably pretty normal that you loose some of the
electorate That’s why they include so many But you really should compensate
for the electrode loss when setting the processing depth on the work-head I don’t remember reading anything about this in the user manual or seeing it in any video Also, how much do you compensate, is it a certain percentage of the total processing length Or maybe the electrode size? Or is it just guesswork? Well, I will add a centimeter to the work-head processing depth. And then we’ll try the machine and high-power mode not And I’m not sure that’s a good idea because these electrodes are pretty thin. We might end burning them up I think it was in one of their videos that they mentioned that you should use the low power mode up to five or six millimeters And bigger than that you should go into high-power Mode Well this is certainly wider than five or six millimeters but not thicker Here we go again. Switching on the machine Starting the water pump – starting
high frequency – Servo – Vibration And this button they’re labelled stepper
sets the machine in high power mode I have no idea why they called that stepper There’s some pretty heavy relay being switched And now if I press the down button things should start In low-power mode and you don’t
use the current adjustment dial But apparently it is needed in high power
mode So that’s something I will have to work out. But, we’ll see how this goes All right here we go, and I’m hoping for some fireworks. Not too much of course because that might damage the camera At the moment we are drawing about
ten amps. In low-power mode it only draws two amps And the voltage seems to be a to be around 35 volt This is as stable as I can get it We’ve been running for about five or six minutes and the electrode had already moved from
five to one centimeters So unless the electrode is just splitting in half. We should almost be at the bottom of the flute Already done. And that’s 8 minutes Damn bubbles It is still bubbling Well, at-least the electrode isn’t s plit in half Well, a bit more is certainly missing. So high-powered mode was at least four times as quick as low-power mode But it also cost about the double amount of electrode And as you can see I still didn’t manage to cut off a flute I’m feeling a bit like a failure here Even though I added at least a centimeter to the processing depth on the work-head I guess I will need a little bit more
experience to correctly guess the processing depth But for now I had enough with his blade electrode And I will push through this hex electrode
from this side and get this job finished today I’ve set the processing depth to 4 cm But I expect is will be finished long before that I haven’t changed the settings. But we’re now drawing between six and eight amps and about 30 volt This hex electrode isn’t working as stable
as that blade electrode The voltage and amp meters are a bit erratic I guess we’re already there So why isn’t the head coming up The limit stop on the work-head has vibrated loose I tighten it up again so I expected we’ll stop processing at any moment now So that’s something to keep in mind you really need to tighten up that limit screw Because otherwise it might vibrate loose well I finally win And, I really did a number on that tab Almost through there They’re the same over here Here’s the end of that last electrode. It’s pretty rough-looking. But at least it got a job done And also very important the thread on the work-piece is still fine I will sleep well tonight So now I have to clean up this mess I don’t think it’s a good idea to submerge a Mag-base into this stuff I’m really surprised at how much black
stuff is coming of such a little tab Check out how much gunk these magnets
have caught So it looks like it’s not a bad idea to use some magnets to try and catch some of that swarf I bet I just set a new world record for the slowest broken tab removal ever But since I’m not on the clock that’s fine I’m just starting to learn about the machine I think in time,me, and the SFX-4000B, will
become good friends I was a bit surprised about the amount of electrode that’s lost during processing It makes setting the processing depth a bit of a struggle. In this case not a problem But what if you’re working against the clock, on a delicate piece, of equipment with a blind hole, It will be hard to get that right in one try You might need to take a couple of passes and carefully inspect how far the process is along And it also might be necessary to a grind the electrode flat again before it bottoms out But perhaps there are tricks I don’t know about that makes EDM live a little easier I like the machine, I liked playing with it. but I will not recommend it Simply because I’m no expert on these
kind of machines You will have to do your own investigation and make your own informed decision But maybe my first EDM steps will help you a bit There are plenty Chinese EDM machines on Alibaba. Most of them are cheaper. But as far as I can tell none of them has a high power mode Being able to work four times faster can be an important thing in a competitive market But if you got some real money to waste buy a wire EDM. Those machines are just unbelievable freakin cool! Well I guess that’s it for me I had a few more tests planned but I’m running out of time And this is already my longest video ever So congratulations to you for reaching the end I probably wouldn’t even have started a video this long One more thing You can actually buy brand new shapers on Alibaba Big ons’s. How cool is that? I am surprised that those antiquated machines are still being made. Wouldn’t mind testing one though.


Rex Panepucci

Aug 8, 2018, 1:29 pm Reply

Try putting the pump in a separate tank of water so it has clean water.


Aug 8, 2018, 1:32 pm Reply

I loved the video. I am jealous, this is a wonderful toy, sorry machine, to have in the shop.

I have broken a few taps in my time. Not many, but each time it is a hassle. I tried purchasing tap removers. They work really well at removing money from the wallet, but so far I have not been able to get them to remove the broken tap, the fingers bend.

I have read posts on machining forums about EDM, even a thread where a fellow made a machine at home. I had not seen these in operation before. I had not tried searching for a video.

I am not surprised at the electrode wear since the arc is going to wear the electrode. I did like the vibration setting, big improvement.

The operation is more messy than I appreciated, due to the tiny metal particles created.

The machine worked well. Like many machines, including our lathes etc. have a learning curve.


Zephyr Old

Aug 8, 2018, 1:36 pm Reply

Hi Nice review, takes a lot of time to find the right settings, seems like the manual could be better on that point, did the hex electrode go all the way through, looks like it only went 5-6mm down ?.


Aug 8, 2018, 1:37 pm Reply

You will master it and be making millions in no time, looks like a good unit, the hex electrode should burn a hole for a hex wrench to fit, i have seen them them burn neat holes through some thick and nasty steel on earth moving equipment.

Steve just Steve

Aug 8, 2018, 1:42 pm Reply

So how long did it take to get thru 1 flute in high power?


Aug 8, 2018, 2:46 pm Reply

This is SEX EDM machine?

Richies Restorations

Aug 8, 2018, 2:57 pm Reply

I'm jealous but hey, someday it might be me! Happy for you good luck and have fun with that thing!

luderick wong

Aug 8, 2018, 3:43 pm Reply

Man, 10a at 35v = 350w???that is peanut compare to a welding machine, not even close to high power. But i am suprise that they send you a m20 tape to test the machine. Simply too big the bait for the fish to swallow. Are you using m20 very often? I guess m4 ~ m10 will be more common, right? Why m20 then? Look at the electrolyte this machine is using….
With a m5 tape this machine may not have the same result, less surface area, less volume and more resistance…. That high power 350w arc may not even scratching the skin of the tape. …
Next time you may try using mineral oil or other lathe coolen agent to replace water for better result and your container is too shallow. The spark is suppose to be submerging under the water line all the time to get rid of oxygen in the equation. but i also have to remind you that, hot oil+spark+ air is a perfect equation to FIRE!!
Good edm machine can work on a m1 hole, which means the electrolyte is less than 0.5mm dia. I don`t know how many amp this machine will draw from your wall socket, hope it will be less than 20a otherwise you will have a blown fuse…..
I guess you have spare fuse at home, my friend?
By the way, don`t let the environmental protection department knows that you have this machine, you will get law sue for discharging heavy metal polluted water if they got you.

Timbo Dewabem

Aug 8, 2018, 4:46 pm Reply

This is Luoyang Xincheng, I want my machine back 😛 :'( !


Aug 8, 2018, 5:23 pm Reply

I am jealous because no one sends me such stuff for testing …:-) …Anyway, looks like this thing got some potential. I guess one of the problems is that you use tap water, demineralised water or kerosene would be better because water splits into oxygen + hydrogen and you don't want much oxygen around your electrode. Also be careful when touching the electrode, 50V HF can burn your fingers quite badly.


Aug 8, 2018, 6:11 pm Reply

Electrodes are expected to be expended as you do the job.

Michael Schnock

Aug 8, 2018, 6:50 pm Reply

Mannnn , it took only 90 secs to get me laughing " I Kindly ask you to piss off "? — , but — cutting with a blade like electrode a smaller piece is mostlikely not perfect .- you have to get the core,. thats most important. U also drill Bolts from the center , right ?

Tameem Moaleji

Aug 8, 2018, 7:48 pm Reply

wth Is this such a big problem that they made a machine for it? Just dont let the students play with the taps and you wont need a SfX machine lol

jan van ruth

Aug 8, 2018, 8:05 pm Reply

electrodes van zuiver koper werken beter en gaan langer mee

Daniel Keal

Aug 8, 2018, 10:09 pm Reply

I would like to see you review a shaper hope you get to do it

Bobby Tectalabyss

Aug 8, 2018, 10:49 pm Reply

Hi RM. Cool machine. I have a Bother in-law here in the States. that works for a Company called Sossner metal Stamps. The Edm machines I have seen there, all use edm oil. It works that's what counts. You did fine using it. I may look into getting one. Has always Liked,Shared and added to Playlists.
All my best.


Aug 8, 2018, 12:29 am Reply

Love that big hammer!


Aug 8, 2018, 12:57 am Reply

Lol i love this video thank you

John Strange

Aug 8, 2018, 2:48 am Reply

Pretty cool. I wrestled for like 2 hours with a broken tap yesterday before scraping the whole part, so this would be worth a shot for sure. If you've never broken a tap… it'll make a preacher cuss!

Chirpy’s Tinkerings

Aug 8, 2018, 5:06 am Reply

cool video, I wouldnt mind seeing some more tests with that thing. I just looked at the price of the thing and man is that thing expensive, lol. I have a few things that I would burn the taps out with it, lol. Im kinda curious how it is actually put together, It looks like a pretty simple design and I think with a longer travel for the electrode, it would be quite a bit more useful than it is now. I also wonder if using a copper electrode would make any difference vs brass, which imo would be crappy as an electrode anyhow, and is probably why it's eating so much of the electrode away.

MetalWorks Machine Shop

Aug 8, 2018, 5:15 am Reply

Shapers are awesome. Mine is 60 years old and still cuts a good chip.


Aug 8, 2018, 11:18 pm Reply

Check your ''discussion'' tab . . . I think I have the answer to your ER collet from hell problem SOLVED ! This video might get the idea across ! VAPORIZED 😀 https://www.youtube.com/watch?v=7ENSGgeiOVI Good luck !


Aug 8, 2018, 11:51 pm Reply

Interesting. I wonder if adding an electrolyte (such as baking soda) would improve the process ?

Ken Fullman

Aug 8, 2018, 6:34 am Reply

I think a pair of needle nosed pliers might have been quicker.


Sep 9, 2018, 9:11 pm Reply

That thing has a yellow label that says sex! That's one hell of a sex toy!

Amy Nie

Sep 9, 2018, 5:48 am Reply

The amazon link: https://amzn.to/2Nw5uQR

The Functions and Features of This Broken tap remover

1. Portable edm broken tap remover abide by the principle of Spark Erosion to remove broken tools, no direct contact, thus, no external force and damage to the work piece;

2. Excellent Structure: Portable edm is convenient to carry due to small size and light weight, and shows its special superiority for large work pieces. Working head is separated from the machine and could rotate in any direction, which is helpful for complex machining;

3. Portability: Light weight; Small size; Carrying handle on the top of the power case;

4. Convenient Operation: The magnetic base could attract on work pieces to finish processing easily;

5. Vibrate work head: Vibrate of the electrode, greatly improved the processing efficiency;

6. Automation: Auto feed; Depth setting(Stop at a specific depth); Alarm and auto retract;

7. Economical and Convenient: The working liquid is ordinary tap water; power consumption is moderate; the inlet pipe is detachable;

8. Wide Processing Range: Broken taps and drills (conductive material) above Ø2mm (Ø2mm is included);

9. Long Working Time: A cooling fan installed ensures the ventilation, which keeps the machine working continuously.

The website: www.brokentapremover.com

Jamil Rahman

Oct 10, 2018, 1:37 pm Reply

sir did they provide electrical and electronic circuit diagrams and drawings

Davo’s Shed

Oct 10, 2018, 11:05 am Reply

I think that went very well for your first go.
I did see something very similar many years ago. The electrode was made of carbon graphite stuff an they used to make odd shaped holes in various hard materials by shaping the graphite. The whole thing was submerged in oil not water. I have not seen another one of them until now. We used to call it a spark eroder. The highest profile job it ever did was take a broken tap out of a jet turbine blade. I think they were very happy we got it out without damaging the blade. Very interesting video.


Oct 10, 2018, 3:37 am Reply

Video recorded destruction of the 'broken' machine could help them mitigate the cost of people claiming their machine failed, when all they're trying to do is take advantage of the company's replacement policy, and re-selling the machine. Not a bad idea.


Oct 10, 2018, 1:26 am Reply

im leaving a nasty comment
nasty comment

kevin faulkner

Oct 10, 2018, 5:02 am Reply

well done. now i can get that broken tap out of the engine I am bulding, I'll just need to use the neighbors pool, I dont they would mind.


Nov 11, 2018, 6:46 pm Reply

Nice machine , some more testing wil bring the answer. 1e the electrode should be copper last longer . 2e the electrode should be smaller or the same as the removing part. The hangover of the electrode reduce the efective spark at the top of the flute but will spark al around. the surface of the flutes are much to coars. good EDM leaves a fine finisch. we used petroleum ,kerosene< it should not conduct electricity.
succes .


Nov 11, 2018, 6:59 am Reply

great video of the SEX machine. There's a company in Japan that uses a giant machine to bore minute and accurate holes in metal using a similar process. You can see it on Youtube under rilling hole in pencil lead.

Сергей Луцкий

Nov 11, 2018, 9:47 pm Reply

I guess there should be some cyclic action to it, rather than blasting away like an electric arc furnace.

Mark Presling

Dec 12, 2018, 1:13 pm Reply

I'm interested to see if it makes a difference using copper electrodes.

Pellervo Kaskinen

Jan 1, 2019, 7:36 pm Reply

I have no real or firsthand experience about the EDM, although I have seen one used a couple of times. The first time was exactly a broken tap removal. The second one was what is called Wire EDM. Both used copper electrode, the second one a copper wire in a loop. It was cutting sideways into some super alloy.
From an electrical perspective, I think the operation is somewhat akin to a high frequency start (or better yet continuous AC) TIG welding. The High Frequency is starting the arc, but the real power that does the job comes from the lower voltage, higher current that follows.
In any case, I myself have broken one 1/8” tap in an aluminum block. Took me more than a day to grind it out with a Dremel and two different shape Chinese diamond bits. It was a closed bottom case of about 1/4” or 3/8” depth. I then wished I would have one of these EDM machines.

Bala Chandar

Mar 3, 2019, 11:42 am Reply

Thank you for the video on EDM. Along with you, I learned something useful on the subject.

At 5:58, you show a nice big sledge hammer and mention that you are fully prepared to make the smash video. Hey, even if you are completely dissatisfied with the machine, don't make that mistake. If you send the smash video to that Chinese company, they will promptly pay you $ 0.00 because, that's what you paid in the first place for what you have received!

Shane Powell

Mar 3, 2019, 7:48 pm Reply

for the "kindly piss off" comment alone I'm subbing this channel.

Douglas Brown

Mar 3, 2019, 9:55 pm Reply


Geer Assink

Apr 4, 2019, 11:47 pm Reply

Some learned. I was wondering , could one make a slot with that flat bit so you cloud use a screwdriver to get the broken tap out? Or Will it be pulverizing?

Adrian Adam

Apr 4, 2019, 10:22 pm Reply

Do you know if it is possible to use petrol or different liquid instead of water?

John Hili

Jul 7, 2019, 5:20 am Reply

What is the price of that machine?

Ulises zx

Jul 7, 2019, 12:27 pm Reply

Thank You VERY VERY MUCH for this video! . Regards, BEAR HUG!

oo oo

Jul 7, 2019, 12:55 pm Reply

use it on the cat. you have toxo

Peter Ciurea

Aug 8, 2019, 11:16 pm Reply

reverse polarity. you are donating metal not taking it away

Ru Mu

Aug 8, 2019, 10:18 pm Reply

you should try it with deionized water.

technology k.s

Sep 9, 2019, 1:33 pm Reply

Indian priese bataye rate in indian

Ray Robles

Sep 9, 2019, 4:16 pm Reply

Why not use a round copper electrode?

Ray Robles

Sep 9, 2019, 4:17 pm Reply

Your loosing electrode cause you need to add a jump

technocaveman San Diego

Oct 10, 2019, 6:49 pm Reply

I gotta have more unboxing 🐮🔔

Rajesh Pithwa

Nov 11, 2019, 5:07 am Reply

Whot is priej

morntech asia

Nov 11, 2019, 4:22 pm Reply

if you ever use it again then try copper electrodes !!!!

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