China rectangular lifting electromagnet

China rectangular lifting electromagnet is not just a technical solution. This is the intersection of speed, safety and predictability in workshops where every second of downtime costs tens of thousands of rubles. We have tested more than 17 models over the past five years - from budget Chinese assemblies to premium European systems. And every time the client asked: “Why rectangular?”, we opened the loading platform, placed a steel sheet 20x1200x6000 mm - and turned on the magnet.

The rectangular shape solves three problems that round counterparts ignore

A round electromagnet creates a concentric field. It is strong in the center, but weakens sharply towards the edges. Rectangular is another matter. Its magnetic system is distributed over the entire area: evenly, linearly, controlled. As a result:

• Full fitfor flat workpieces - without air “suction” at the edges;
• Stable riselong lengths: channels, sheets, profiles - without distortion or slippage;
• Minimum energy losses: 18-22% higher efficiency at the same power supply (fushun workshop test data, 2023).

We saw how at one plant in Yekaterinburg they replaced two round magnets of 5 tons with one rectangular magnet - 8 tons. They reduced the cycle time from 42 to 27 seconds. And most importantly, cases of failure when turning the crane have disappeared.

Reliability is not marketing, but engineering architecture

China rectangular lifting electromagnet is often associated with the risk of overheating or sudden loss of power. But this is only true for low-quality solutions. True reliability is built from three layers:

1. Heat resistant Class H insulation— withstands 180 °C without degradation. Not “to failure”, but in normal mode 24/7 at ambient temperatures up to +55 °C.
2. Emergency hold system: when there is a power failure, the built-in battery (LiFePO₄) turns on, ensuring the load is held for at least 15 minutes - enough to safely lower the metal.
3. Mechanical protection: Reinforced die-cast aluminum alloy housing with anti-vibration inserts. Not a single model showed cracks after 120,000 cycles under shock loading conditions (test mode GOST R 52297–2019).

Important: reliability begins with the correct choice of power. If the declared lifting force is 6 tons, and the actual weight of the load is 5.8 tons with a steel thickness of 16 mm, this is normal. But if the same magnet takes 5.8 tons with a thickness of 6 mm, it means it is working at the limit. Such solutions quickly lose magnetic induction.

A quick climb is not about the speed of activation, but about the lack of preparation

The “fast” in the name is not a publicity stunt. This reflects three practical advantages:

• Zero surface preparation: does not require stripping of rust, oil or paint - even works on oxidized steel;
• One click instead of three actions: there is no need to fix the slings, check the angle of inclination, adjust the grip - brought it up, turned it on, lifted it;
• Automatic adaptation: modern models regulate the current in real time according to the thickness and grade of metal (for example, 09G2S vs. 12Х18Н10Т).

At a warehouse in Novosibirsk, an operator with 12 years of experience said: “I used to count cycles using a stopwatch. Now - by the number of sighs. With this magnet there are fewer of them.”

How to choose - without overpayments and compromises

Don't buy by weight. Buy bynature of the work:

• If the cargo is sheets, strips, channelsthicker than 10 mm→ you need a magnet with high magnetic induction (≥1.4 Tesla) and a rigid magnetic core;
• If the load is thin sheet steel, mesh, parts with an uneven surface → field uniformity and the presence of compensation zones are more important;
• If a workshop with frequent voltage surges (<±15%) → a built-in current stabilization system is required.

LONGI Corporation has been producing such solutions since 1993. The Fushun plant produces 4,000 units of equipment per year. More than 60% of engineers have higher education. Each rectangular lifting electromagnet undergoes three-level control: at the winding stage, after assembly and before shipment. Documentation includes test reports for lift, thermal resistance and impact resistance.

China rectangular lifting electromagnet is not a replacement for a crane. This is a tool that makes the faucet smarter, safer and more profitable. It does not require training, does not create downtime, and does not fail when switching from ferrous metal to alloy steel. It just works - the way it's designed. Detailed technical parameters, connection diagrams and operating recommendations are available on the company’s website.