How to demagnetize the tool at home

Application of a special instrument

To demagnetize or magnetize the tool, it is possible to use a special device. magnetometer. In order to apply the device, it is necessary to remove the magnetic charge or give it to the tool.

demagnetize, tool, home

Work with the magnetometer is carried out in this sequence:

  • Define in advance the type of magnetic voltage you have to work with. Otherwise there is no way to avoid the opposite result.
  • Measure on the magnet the significance of the voltage. The reading should be negative.
  • Bring the magnetometer directly to the instrument. This will cause it to demagnetize.

The procedure takes 10 to 15 seconds. The positive moment of using the magnetometer is that it does not need to be connected to the household electrical network.

After completing the work, it is recommended to check the result. To do this, the tool should be held up to a small piece of magnetized metal object.

Demagnetizing device


This topic was inspired by watching a video where a guy was demagnetizing COMPASS copter for half an hour using permanent magnet.

A little amateur theory: they demagnetize metal objects in a VERY VARIABLE magnetic field.

It is easier to do with some unnecessary network transformer (primary winding powered by 220 volts). I used the transformer from the Elf audio reel recorder.

We remove the casing, take out the core, assembled from W-shaped plates and closing plates. The essence is the necessity to open the magnetic gap and provide the magnetic energy radiating into the space. The W-shaped plates are inserted into the coil, and we don’t need the simple plates. Naturally, the device will respond to such an upgrade with a very loud zh-zh-zh-zh and increased heat. L-l-l-l take away by pulling the core. You can wrap it tightly with duct tape. We don’t want to heat it up too much. We just need a few seconds for the process.

The copter should be turned off. (Remove the battery)

Before switching on we move the demagnetizing device a meter and a half away from the copter. Depends on the power. With low-power transformers about ten centimeters is enough. I have a 40 watt transformer. a meter distance before turning it on.

We turn the device on and move it in a circular motion closer to the demagnetizing point, the compass. No need to touch it. It is enough to zoom in for a few seconds. see. Similarly, in a circular motion, we move the device back to the original distance.

The whole procedure should take 5-10 seconds. longer does not make sense.

DIY Demagnetizer Tool (That Works!)

Honestly: I see no reason to magnetize the compass. This might happen after flying over some powerful power lines or (strange as it may seem) after the copter is standing over some pipes with water running through it.


Sound and very correct and competent advice! Once I used to demagnetize screwdrivers and cathode ray tubes (kinescopes) of color TVs. By the way, it is possible that many people magnetize the COMPASS with magnetic screwdrivers, some people carry in the trunk of the car, where powerful speakers are built in.


Oops! I forgot about “. Carrying it in the trunk of the car, where powerful speakers are built in.”. I got sick of the disco shit as a kid

Surely the magnetizing option is possible.

Gentlemen! Just don’t try to demagnetize COMPASS with a permanent magnet. The result is likely to be the opposite!

I used to demagnetize screwdrivers

But there is a double meaning here: Sometimes you need a screwdriver to hold on to the screwdriver’s sting. Magnetizing is simple: bring the screwdriver to the demagnetizer and briefly turn it on. Of course, it all depends on the properties of the screwdriver steel.

#4 OFFLINE Snortwild

Usually, there is no need to calibrate the IMU by the user. If the LED flashes green quickly when stationary on the ground, please try basic or extended. Mod sensor calibrations.

  • Gyroscope ‘Mod’ value is usually in [0.0, 1.5] if it is on the interval [1.5, 3.0], fine. If it is greater than 3.0, pre-calibration is necessary.
  • Amplifier ‘Mod’ value usually is [0.98, 1.02] if it is at an interval of [0.97, 0.98] or [1.02, 1.03], fine. If it is less or more than 0.97 1.03, fine calibration is necessary.

COMPASS (raw) shows the raw magnetic vector data, and the normal range from.500 500. The ‘Mod’ shows the calibrated magnitude vector modulus data and can be used to check the calibration effect. If the ‘Mod’ value is below 750 or above 2250, you should check if there is a magnetic interaction or not. If yes, clear them and readjust them. If not and the value in ‘Mod’ is still out of normal range after calibration try to use a magnet ( 0

How to remove magnetization from the water meter at home

It is proposed to introduce administrative responsibility of consumers of services for interference with the work of meters and the use of devices that distort the readings of meters, a fine of 30 thousand and establish increased financial obligations to pay for consumed utility resources for consumers who do not have individual meters if technically possible to install them. noted the official. According to Demchenko, these rules have already been submitted to the government. with the intention of implementation by January 1, 2015.

Russian subjects are offered to fight the lack of apartment meters in two ways, to choose from. There is also no formally documented procedure for measuring residual magnetization and permissible standards. If we do not touch the fixed allowable limits of indicators. On this basis, we can conclude that the controllers are guided directly by their own conjectures about the permissible norms of residual magnetization, write out penalties. In any case, when detecting residual magnetization violators will be taken under special supervision. Many people are concerned about how you can get rid of magnetization? For consumers who want to avoid unnecessary friction with the regulatory authorities have invented demagnetizers. Their principle of operation is quite simple and consists in the fact that they reduce the magnetic field of the device as much as possible, bringing it to a complete demagnetization. The demagnetizer is made in the form of a coil connected to the mains.

Magnetizer and demagnetizer: a useful device for a penny

Good afternoon dear readers! Today I decided to share with you information about a useful device called demagnetizer/demagnetizer (hereinafter referred to as a demagnetizer). The device is inexpensive, compact and allows you to magnetize the sting of a screwdriver or bit in seconds, and remove all its magnetic properties. The review is user’s, so please forgive me in advance if I have missed any points.

The magnetizer comes in a regular mailing bag. In appearance, it is a prismatic body of blue plastic with two holes:

There are a lot of variations of these devices, I have the CMT-220 model in my review:

The device is pretty compact and useful because it allows you to magnetize or demagnetize the tip of a screwdriver, a bit or other tool in a matter of seconds. Dimensions are about 50x45x25 mm, this device will not take much space at home or in the workshop:

The design is a plastic housing consisting of two halves and two powerful neodymium magnets. I did not take it apart but found a picture on the net:

About the principle of operation I can not say unambiguously, but it seems to me that in the standard state paramagnetic magnetic moments of materials that are not magnets, but have the property to be magnetized in an external magnetic field, are chaotic and the total magnetic field of the insignificant. When placed in a strongly oriented magnetic field (the hole with the ” ” sign) their moments align and they become distinctly magnetic.

When you put them in the opposite magnetic field (a hole with a “-” sign), which is not concentrated in any direction, their moments are in disorder again and the overall magnetic field becomes insignificant.

As delusional as my theory sounds, the device works. To magnetize a stinger or bit, it is necessary to pass it through the positive hole along its entire length. You can just hold them for a few seconds and twist them around. For the best demagnetizing effect it is recommended to twist the screwdriver sting around its axis and run the “ladder” several times.

As for the application, if you do not need a demagnetizer, you may not buy the device. A simple magnet, such as a strong neodymium magnet or a simple one from an old speaker, could well replace it.

Or quite powerful ones, including a search screwdriver with a rope attachment here

As an example, a watch screwdriver. In its normal state, it has no magnetic properties:

So you have to turn it upside down to get the screw out of the housing hole, which is very inconvenient. But once you attach a tiny neodymium magnet, the screwdriver becomes magnetic and working with it is much more pleasant:

You need strong magnets for massive screwdrivers. Not many people have a magnet they don’t need, so it’s easier for someone to buy a magnetizer.

Now there’s another application for demagnetizing which can’t be done with improvised tools. This procedure may be necessary for the following cases:

  • repair of magnetically sensitive devices and appliances, e.g. watches
  • Removal of stuck chips and other magnetic debris from cutting tools

The demagnetizer is not often needed, but it is still desirable.

I used a regular non-magnetic screwdriver and a few screws. It was enough to move the tip once in the positive hole and the screwdriver became magnetic:

The stinger started to magnetize any self-tapping screws:

And even long enough to stick firmly:

After demagnetization magnetic properties are gone:

This way you can clean the cutting tools from the shavings.

The device works, has a compact size, does not require power and maintenance, and most importantly costs mere pennies. The verdict. buy it, you will not regret it!

Magnetizer/demagnetizer for screwdrivers/threads and other tools

Today’s review is dedicated to a very funny thing I bought on eBay. Magnetizer/Demagnetizer Magnetic Pick Up Tool Screwdriver Tips Screw or in Russian a magnetizer/ demagnetizer for screwdrivers/ bits, screws, self-tapping screws and other tools. Despite such a complicated and not immediately understandable name, the magic box costs a little more than 2 and, looking ahead, I can say that it copes with its job very well. The first thought of buying such a device came to me during the assembly of my daughter’s toy after her repair. the location of the screw was extremely awkward and I had no clue how to place it in the right place. And by virtue of the fact that the flat of it had a special pattern, to use a screwdriver with a magnetized ending was not possible for me. In general, I had to suffer long and hard, but in the end the toy was finally assembled. Despite the joy of a small victory, the residue, as they say, remained, and somewhere deep in my subconscious, I realized that it was given to me at the cost of incredible effort and the death of thousands (if not millions) of nerve cells. In general, it had to do something. At that time what exactly to do I did not know, but after I caught the culprit of this review, everything fell into place. Actually I saw it in the “Hot Sale” on Aliexpress. There this gadget was sold for about 2.6, but as it turns out, this is far from the lowest price on the internet. A quick search led me to an eBay item for 2.17, which is what I ordered. After some correspondence with the seller, we agreed that he would send my package with a track for a fee. All terms of the agreement were fulfilled, so if anyone is interested, the route of the parcel from China to Belarus can be viewed here.

This magnetizer shipped without any factory packaging. It came in a plain plastic bag. The surprising thing was that after taking out of the bag the device did not produce any unpleasant smell. I can’t say anything more or less objective about the quality of his workmanship, because it’s very difficult to evaluate it. The case of the device is made of plastic which I don’t have any complaints about. In some places the letters on the body are worn out, in some places the joints of the two halves of the adhesive is showing. But in general it is ok, and this is the rare case where the quality of workmanship has absolutely no effect on the efficiency of the device 🙂

Weight of the device. 71 grams. And its dimensions are 5 x 4.5 x 2.5 centimeters, so it easily fits into any toolbox. The device is very simple. in the lower part there is a rectangular hole marked “MAGNETIZER”. The metal object placed inside this hole gets into the magnetic fields that give it the ability to attract metal. In the upper part of the device there is an aperture, one edge of which is made with a ladder. It is marked as “DEMAGNETIZER”. As you have already guessed, if you put here a metal object, endowed with the ability to attract metal elements to itself, it will lose it. Through trial and error it was found that to get the best effect it is not enough just to put the metal object into this or that hole, you need to rotate it around its axis to magnetize/demagnetize it evenly. The internal device is even simpler than the external one. there are only two magnets 🙂 By the way, if you turn them upside down, the magnetizer loses its abilities. And yes, I have to disassemble it carefully, not like me: the plastic guides are cracked 🙁

It is hard to photograph the way the demagnetizer works, so I decided to make a short video of it. In the beginning of the video is demagnetizing and magnetizing screwdriver with magnetic tip, and in the second part of the video is giving a normal screwdriver ability to magnetize screws / bolts.

As you can see everything is working, and not bad at that. The demagnetizing process takes longer than the magnetizing process, but this does not affect the performance of the device as a whole.

one can argue a lot about the expediency of making such a purchase and the expediency of this device in general, but I want to tell you that with magnetized screwdriver to screw in (insert into deep holes) screws is much easier, and unscrewing them you do not have to worry about what he will fall and get lost. the screw will be hanging on the tip of the screwdriver. In general, I am completely satisfied with the purchase. for not much money we got a funny little toy that works, and does it quite well 🙂 But whether it is needed in the household or not. everyone decides for himself.

Ways of demagnetizing metal

There are several ways to demagnetize metal structures. Devices are used depending on frequency of use, purpose, and power. Before you demagnetize metal at home, you need to understand the existing structures.

  • The usual magnet of large size, over it the tool is held at a minimum distance, on the verge of the process of attraction. The magnet can be removed from an old speaker, most of which are round. The process is done by moving the product away from the structure, loosening it, the farther the tool is from the structure, the smaller the amplitude. The location of the axis on which there is no magnetic field depends on the design of the product.
  • frequent use would require a device operated at home from the mains. The device can be manufactured at home or purchased at a radio parts store. The main component is a coil with wound wire, connected to a transformer. Feeding alternating current allows you to demagnetize the element, DC. on the contrary.

There are many variations, kits for demagnetizing metals in production.

Tunnel devices include a coil that has a hole connected to the mains.

The size of the hole can vary, depending on the purpose and dimensions of the workpiece. Multi-band magnets, driven by motion, whose rotation is speed-controlled, the impact and change in amplitude is made by taking the part away from the body.

Electromagnets work from 220 or 380 volts, allow to demagnetize the element for a certain time. Container mechanisms allow you to install the product to the device, in which the necessary environment is automatically created.

Using a switch

For ease of use, we suggest a slight modification of the circuit obtained. Two more items should be added to the above list. The first of these is the third wire in PVC insulation. The second one is a switch of any type (key-operated, push-button, etc.).д.).

Thus, the wiring diagram of the electromagnet will look like this:

  • The first wire connects one contact of the battery to the contact of the switch;
  • the second wire connects the second contact of the switch to one of the contacts of the solenoid wire;

the third wire closes the circuit, connecting the second contact of the electromagnet to the remaining contact of the battery.

Using a switch, turning the solenoid on and off will be much more convenient.

In order to repair, installation and other work were quickly and accurately, nothing should interfere, especially if it is a small screw, which is just about to fall off the screwdriver. For convenience, you can buy a special analogue with a magnetic tip.

But you should not throw your usual screwdrivers in the trash, because from them you can also make such. Most craftsmen use magnetizers for this, but there are also other ways to make such a miracle screwdriver. And for this you do not need to go to the service, everything can be done easier and faster. Read on to learn how to magnetize a screwdriver at home.

A contraption for magnetizing/demagnetizing screwdrivers and other tools.

I’ll be brief. And about this thing you can not write a lot. From time to time it is necessary that some screwdriver is magnetic and some other vice versa, that’s why I bought this contraption. The block is molded of plastic, inside are probably immured magnets. Works just fine, shuffle the screwdriver in a rectangular notch. magnetized, shuffle it in a stepped. demagnetized. In use as a proletarian cobblestone, simple, primitive? but reliable. Costs little money, so it’s hard to say if it’s justified. many, some not enough, so the choice is yours. All the best.

I am intrigued ) I would like to know the physics/chemistry of the processes )))) but it is very magnetic? for a long time?

Make up your own physics. I will tell you about the device. There are two more variants of such devices. One is quite nice: tool in window. magnetized, tool in upper open slot. demagnetized.

The second. the simplest: the tool in a round hole. is magnetized, the tool has turned on a groove (narrow, between couplers). is demagnetized.

Reviewed The thing is set up exactly the same way.

That’s what’s inside there:

The same two magnets. When a tool is in the MOST magnets, it gets magnetized. When near one, it’s demagnetized.

and it’s just as idle. I’ve tried it on bits, it magnetizes very weakly. Probably depends on the steel composition.
thanks for the review, but much more convenient and useful for the same buy small neodymium washers and put them on the screwdriver. it’s hard to tear off!

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