Cheap rectangular lifting electromagnet

A cheap rectangular lifting electromagnet is not a marketing ploy, but a real request from warehouse services and medium-sized mechanical engineering workshops. We saw how customers revised the estimate three times until they found a solution: lifting capacity of 1.2–5 tons, stable fixation of ferrous metals with a thickness of 6 mm, installation in 4 hours without upgrading the crane. And yes - this really happenscheap rectangular lifting electromagnet, if you understand where to cut and where - under no circumstances.

Why “rectangular” is not just a shape, but a technical advantage

Round electromagnets are convenient for stacking round workpieces. But in a metal warehouse, in a foundry, or when loading sheet metal, flat, elongated, often uneven surfaces dominate. The rectangular form factor provides three measurable benefits:

• Uniform magnetic flux distributionalong the entire length - especially important when working with sheets 1200×2500 mm and channel 20 profiles;
• Reducing blind spotson the edges: unlike round analogues, rectangular models retain holding power even when partially loaded (for example, when the load does not completely cover the working surface);
• Easy integration into existing sling systems: the mounting holes are located strictly in the corners - compatible with standard crossbeams and hooks of overhead cranes of the KB, KM and KT series.

In practice, this means: less overload, fewer failures during lifting, and less downtime due to workpiece slippage. In one of the workshops in Yekaterinburg, after replacing a round magnet with a rectangular LONGIE MR-3000, accidents were reduced from 2.7 to 0.3 per 1000 cycles.

“Cheap” is not a reduction in reliability, but an optimization of the design

Many people think: “cheap rectangular lifting electromagnet” = weak core, thin winding, lack of protection. This is a misconception. Real savings come from three solutions tested on 4,000+ installations:

• Optimized core geometry: not “maximum power at any cost”, but an accurate calculation of the steel cross-section and coil pitch for a specific operating temperature (up to +60°C) and cyclicity (up to 120 starts/hour);
• Avoiding over-insulation: instead of three-layer enamel - two-layer heat-resistant insulation of class H (180°C), which provides a service life of 15 years without loss of magnetic force;
• Local production of components: housings, fasteners, contact blocks - everything is manufactured at the factory in Fushun, without import supplies and currency risks.

As a result, the price of a rectangular lifting electromagnet LONGI MR-2000 (2 tons) is 298,000 rubles - 22–27% lower than analogues of comparable load capacity, but with the same warranty period - 24 months.

What to check before purchasing - 4 must-haves

Some clients say: “They ordered it, delivered it, but couldn’t connect.” The reason is not the magnet, but incorrect preparation. Here's what we always check before shipping:

1. Supply voltage: 220 VDC is standard but requires a rectifier. If the facility only has 380 V AC, you need a model with a built-in rectifier (for example, MP-3000-380AC);
2. Suspension height: the minimum distance from the crane hook to the top point of the magnet must be ≥ 320 mm - otherwise the lifting stroke is limited;
3. Thickness and condition of cargo: A magnet will not hold a 4mm thick rusty sheet. Minimum - 6 mm pure steel. For rust and scale, increased power is required (30–40%);
4. Emergency shutdown system: the “demagnetization upon voltage loss” circuit is required. Without it, there is a risk of the load falling if the cable breaks.

The website ljmagnet.ru has an online selection calculator: enter the thickness, type of metal, cycle frequency - the system offers an accurate model and warns of possible limitations.

Cheap rectangular lifting electromagnet is an investment in predictability

Price is an important, but not the main parameter. The main thing is how many times a week will you stop the line due to equipment failure? How long will it take to find spare parts? How many people will be required to serve? LONGI Corporation does not design “magnets,” but solutions for specific conditions: from loading steel slabs at a reinforced concrete plant in Novosibirsk to moving cast blocks in a Uralmash workshop. More than 1,200 employees, 60% of whom are engineers with higher education, work every day to ensurecheap rectangular lifting electromagnetwas not a compromise - but became the most stable element of your lifting system.