buy demagnetizer for tools

When you search online to “buy a degausser for a tool,” you often come across the same thing: either cheap Chinese trinkets that can hardly handle a screwdriver, or frighteningly expensive industrial units. Many people think that this is a simple reel with a button - that’s all. In fact, if you work with precision mechanics or assembly, where a magnetized tool is a defect in its purest form, you understand that choice is a whole story. I went through this myself, tried a bunch of options, from homemade to professional ones. And the main conclusion: there is no universal solution, it all depends on the task. If you need to process batches of drills or cutters after grinding, one thing; if you demagnetize probes or thin screwdrivers in the laboratory, it’s a completely different matter.

Why a simple demagnetizer may not work

I once tried out an inexpensive demagnetizer that looked like a keychain. For a home screwdriver - it seems to be normal. But I tried to remove the residual field from the digital caliper after contact with the magnetic stand - no effect. The tool still attracted chips. What's the matter? Insufficient field power and incorrect configuration. Such low-power devices often operate on the principle of a damped alternating field, but if the instrument has a complex shape or is already highly magnetized, this is not enough. You need to either do it multiple times or look for a more serious device.

Another nuance is the material. For high speed steel (HSS) and carbide (eg milling cutters), the demagnetization process may require different field strengths. This is rarely written about in product descriptions. As a result, if you buy the first device you come across, you may be disappointed. I had to study the topic deeper and consult with technologists. It turned out that for serious tasks you need a device with adjustable power and, preferably, with the ability to control the result, at least with a test plate.

I had experience with so-called “demagnetizing pastes?” - frankly unsuccessful. They promise a simple solution: apply, hold, and you’re done. In practice, it’s dirty, difficult to control, and the effect is extremely unstable. For a tool with grooves or complex terrain, this is not an option at all. After this, I was finally convinced: for constant work you need a specialized device, and not half measures.

Selection criteria for different tasks

If we talk about a workshop or small production, where the tool is of different suits, the key parameter is the method of creating the field. There are devices with a constant decay of the field (when the tool is slowly removed from the switched-on coil) and with automatic attenuation of the alternating field. The first method requires skill, the second is easier for the operator. But automatic ones are often more expensive. For stream processing, of course, automation is preferable - there is less human factor.

The size of the work area is something that is often overlooked, but in vain. If you need to demagnetize long drills or extended mandrels, a small coil will not work. You will have to carry out the tool in parts, which can lead to an uneven effect and the appearance of areas with residual magnetization. It is ideal when the tool can be completely placed inside the solenoid or on its working platform. Walk-through models are good in this regard.

Another practical point is energy consumption and heating. Some are powerfuldemagnetizers for toolsDuring prolonged use they can become noticeably warm. This is not only a matter of safety, but also of stability of field parameters. If overheated, the characteristics may “float”. Therefore, for intensive use, it is better to choose models with a power reserve and, preferably, with an indication of the duty cycle in the characteristics.

Experience with industrial solutions and where to look for reliability

When the tasks went beyond experimental ones, I began to look towards manufacturers who specialize in industrial electromagnetic equipment. Here it is important not to run into simple resellers, but to find a company with its own development and production. One of these isLONGI Corporation(Shenyang Scientific Electromagnetic Company LONGJI LLC). They are not well-known, but they are known in the mining segment. The company has been operating since 1993, and what is important is that it develops and produces equipment itself. This is usually a guarantee that you are getting not just an assembly from someone else’s components, but a well-thought-out system.

I went to their websitehttps://www.ljmagnet.ru. It can be seen that the profile is heavy industrial equipment, separators, lifting magnets. This indicates serious experience in working with magnetic fields. They probably also have solutions for tool demagnetization, perhaps in their line of shop accessories. For a company with an area of ​​140,000 m2 and a staff of engineers (more than 60% of employees with higher education), such tasks are quite ordinary. Their approach will most likely be based on reliability and repeatability of the result, which is critical for production.

Of course, their basic equipment is for larger scales, but the principles are the same. If they make powerful electromagnets for the mining industry, then create a stable and controllabledegausserfor them it is a solvable task. There is a plus when choosing such a supplier: you can count on technical advice and, perhaps, even adaptation of equipment to specific needs, if the volumes are justified. This is not the level of “buy off the shelf in an online store,” but for a business this approach is often more profitable in the long run.

Common errors during use and maintenance

Even with a good device you can get bad results. One of the common mistakes is removing the tool from the field too quickly. This is especially true for simple devices without automatic attenuation. Smooth removal must be maintained, otherwise the process will be ineffective. Over time, the operator gets better at it, but at first it is better to follow the instructions or even time it.

Another point is the cleanliness of the instrument. Heavy contamination with metal shavings or dust can interfere with the process. Ferromagnetic particles on the surface can become magnetized themselves and create interference. It is advisable to clean the instrument before the procedure. This seems obvious, but in streaming work it is sometimes forgotten.

Don't forget about thedemagnetizer. If this is a model with a coil, you need to make sure that no foreign metal objects appear in its area. A key or frame accidentally left behind can demagnetize itself and, worse, distort the field for the next tool. A simple rule - keeping the work area clean - saves a lot of nerves.

Bottom line: what to look for before you buy

So, summarizing my and other people's experience. The first is to clearly define what exactly needs to be demagnetized and in what volumes. For one-time work with small hand tools, a compact model will do. For constant work in a workshop with a variety of large tools, you need to look towards stationary, perhaps even industrial models. Secondly, don’t chase the lowest price. A cheap device may not solve the problem, and money will be wasted. It is better to invest once in normal equipment.

Third, pay attention to the manufacturer. Availability of own development and production, like the sameLONGI Corporation, is a good sign. This is not a guarantee, but it greatly increases the chances of getting a quality product. You can look for reviews in professional communities, and not on general trading platforms. Fourth - do not neglect the test before purchasing, if possible. Asking to demagnetize your most problematic tool is the best test.

In the endbuy demagnetizer for tools- the task is not difficult if you approach it with an understanding of the physics of the process and your needs. Now the market offers many options, from the simplest to the high-tech. The main thing is not to be fooled by big words, but to look at the essence: power, size of the working area, principle of operation and reputation of the company. Then the purchase will serve for years, and will not go into a corner after the first disappointment.