Large U-Shaped Neodymium Magnets for Heavy Industrial Applications
Large U-Shaped Magnet Product Lineup
Explore Fullzen's **large U‑shaped magnet** models from 80 mm to 150 mm — pull force ranging from **68 kg to 220 kg**, with **SH and UH high‑temperature grades** for demanding industrial environments.
Selecting the proper large U‑shaped magnet depends on your required pull force, mounting space and operating temperature. The four representative models below cover pull‑force tiers from heavy‑duty to ultra‑heavy‑duty. Custom sizes can exceed **200 mm**.
Heavy Duty — 80 mm, 68 kg Pull Force
80×60×12 mm large U‑shaped magnet, **N45SH high‑temperature grade (≤150 °C)**, pole spacing of 45 mm. Finished with **black epoxy coating** for high‑temperature and humid conditions. Designed for automotive welding fixtures, welding tooling, heat‑treatment equipment and outdoor magnetic separation. This is our best‑selling baseline large‑size specification.
Extra Heavy Duty — 100 mm, 95 kg Pull Force
100×80×15 mm extra‑heavy‑duty U‑shaped neodymium magnet, **N42SH grade**, 60 mm pole spacing, black epoxy coating, max operating temperature ≤150 °C. Tested pull force reaches **95 kg**. Developed for large‑die positioning, sheet‑metal handling, permanent‑magnet chuck units and medium‑to‑large magnetic separators. Multiple units can be assembled in parallel to build larger magnetic systems.
Industrial Giant — 120 mm, 140 kg Pull Force
120×100×20 mm giant U‑shaped magnet, **N40SH grade**, pole spacing of 75 mm, black epoxy coating, operating temperature ≤150 °C. Tested pull force up to **140 kg**. Optimised for magnetic separator assemblies, heavy‑duty permanent‑magnet lifters, large steel‑plate handling chucks and heavy‑load tooling fixtures. An auxiliary mounting base is required to prevent magnet cracking.
Ultra Heavy Duty — 150 mm, 220 kg Pull Force
Flagship extra‑large U‑shaped neodymium magnet, 150×120×25 mm, **N38UH high‑temperature grade (≤180 °C)**, 95 mm pole spacing, black epoxy coating. Measured pull force hits **220 kg**. Built for heavy‑duty magnetic separators, large‑scale permanent‑magnet lifting equipment and steel‑mill slab‑handling systems. Larger custom dimensions over 200 mm are available on request.
| Dimensions (mm) | Pole Gap (mm) | Grade | Coating | Pull Force (kg / lbs) | Max Temp | MOQ |
|---|---|---|---|---|---|---|
| 80×60×12 | 45 | N45SH | Black Epoxy | 68 kg (150 lbs) | ≤150°C | 50 pcs |
| 80×60×12 | 45 | N42UH | Black Epoxy | 62 kg (137 lbs) | ≤180°C | 50 pcs |
| 100×80×15 | 60 | N42SH | Black Epoxy | 95 kg (209 lbs) | ≤150°C | 30 pcs |
| 100×80×15 | 60 | N38UH | Black Epoxy | 85 kg (187 lbs) | ≤180°C | 30 pcs |
| 120×100×20 | 75 | N40SH | Black Epoxy | 140 kg (309 lbs) | ≤150°C | 20 pcs |
| 120×100×20 | 75 | N35UH | Black Epoxy | 125 kg (276 lbs) | ≤180°C | 20 pcs |
| 150×120×25 | 95 | N38UH | Black Epoxy | 220 kg (485 lbs) | ≤180°C | 10 pcs |
| 150×120×25 | 95 | N30EH | Black Epoxy | 195 kg (430 lbs) | ≤200°C | 10 pcs |
| Up to 200 mm+ | Custom | N35‑N52 | Custom | Up to 350 kg (772 lbs) | ≤200°C | Quote |
Pull‑force test conditions: 20 mm thick mild‑steel plate, full flat contact, vertical force applied at 25 °C room temperature. Large‑size U‑shaped magnets are more sensitive to the thickness of the adsorbed workpiece. Insufficient steel‑plate thickness will cause a significant drop in holding force.
We recommend evaluating your design with a 3‑4 times safety factor for real‑world selection. Fullzen supports FEM finite‑element simulation and physical test verification for your projects.
Custom Manufacturing for Large U-Shaped Magnets
Fullzen provides full custom manufacturing for large U-shaped magnet projects — custom sizes up to 200mm+, high-temperature grades, steel housing assemblies and magnetic circuit design support.
Most projects for large U‑shaped neodymium magnets are custom‑built. Every magnetic separator, permanent lifter and welding fixture features a unique magnetic‑circuit layout.
Fullzen delivers a complete custom service chain from magnetic‑circuit design to finished‑product delivery:
Key Specifications at a Glance
U-Shape Engineering: Why Large Size Delivers Disproportionate Force
Large U-shaped magnets scale differently from smaller magnets — as pole area increases, pull force grows faster than linearly. Understanding this scaling law is critical for heavy-duty equipment design.
Pull force of large U‑shaped magnets does not scale linearly with size. From a magnetic‑circuit perspective, holding force is roughly proportional to the pole cross‑sectional area. Larger‑size designs deliver improved magnetic‑circuit efficiency thanks to longer pole legs, a lower demagnetization factor and a higher operating working point.
In practice, a 150 mm U‑magnet will not simply produce 1.5 times the pull force of a 100 mm version — the real‑world performance gain is significantly higher.
The width increases by only 50 %, yet the pull force rises by 130 %. This is the practical engineering outcome of the magnetic‑size effect. When selecting magnets for heavy‑duty machinery, scaling up from small‑size samples is unreliable. Design should be based on physical test data or FEM simulation results.
Another unique benefit of large U‑shaped neodymium magnets is the ability to build multi‑magnet arrays. For magnetic separators and permanent lifting devices, dozens of U‑magnets can be arranged with controlled gaps to create a wide, continuous high‑magnetic‑field surface. Fullzen offers magnetic‑circuit simulation and layout consultation to fine‑tune your magnet assembly.
If you require compact sizes instead, explore our standard range of high‑strength U‑shaped neodymium magnets with pull force from 5 kg to 95 kg.
Heavy Industrial Applications
Fullzen large U-shaped neodymium magnets power magnetic separation equipment, permanent magnetic lifters, heavy-duty fixturing and steel material handling systems across mining, recycling and metalworking industries.
Our large U‑shaped neodymium magnets are widely adopted across heavy‑industry applications:
Related U-Shaped Magnet Solutions
Browse Fullzen's complete U-shaped neodymium magnet range — from standard strength models to mini precision sizes, classic horseshoe shapes and custom manufacturing services.
Browse our full portfolio of U‑shaped neodymium magnets to find the ideal solution for your project:
Frequently Asked Questions
Answers to common questions about large U-shaped neodymium magnets — pull force scaling, high-temperature performance, custom sizes, MOQ, safety and transportation.
Our largest standard model measures 150×120×25 mm (FZ‑UL150120UH) with a tested pull force of 220 kg. Custom‑made units can exceed 200 mm in outer dimension, delivering up to 350 kg pull force per single magnet. For heavier‑duty applications, steel‑cased magnetic assemblies can reach ton‑level holding capacity, depending on your layout and magnetic‑circuit design.
Pull force does not grow linearly with dimension. Holding power is roughly proportional to the pole cross‑section, while larger‑size magnets gain better magnetic‑circuit efficiency, leading to a faster‑than‑linear performance boost. For reference: a 100 mm wide U‑magnet delivers 95 kg pull force, while a 150 mm version reaches 220 kg. Width increases by 50 %, yet pull force rises by 130 %. Always design from real‑tested values instead of simple scaling.
For general industrial heat exposure, SH grade (≤150°C) is our baseline recommendation. For welding zones, thermal‑processing equipment or hot outdoor conditions, select UH grade (≤180°C). EH grade is reserved for extreme operating temperatures above 180°C. Note: higher heat‑resistance grades deliver slightly lower room‑temperature flux, so a balanced trade‑off is required for your project.
Yes. Large U‑shaped magnets are rarely used without protection. A steel housing concentrates magnetic flux, protects the magnet body and simplifies mechanical mounting. Fullzen offers a full service including steel housing fabrication, magnet assembly and final magnetic performance testing. Send us your drawing or target pull‑force requirement for a complete proposal.
MOQ for standard large‑size models ranges from 10 to 50 pieces based on specifications. Custom‑engineered parts normally start at 10‑20 pieces, subject to manufacturing complexity. We understand prototype demands for high‑value heavy‑duty magnets and support small‑batch sampling. Contact our sales team for formal pricing.
Given the high value of oversized magnets, we carry out strict full‑item inspection: 100 % visual check, 100 % dimensional control, 100 % magnetic‑flux / Gauss testing and 100 % coating adhesion test. Material certificates and inspection reports are supplied with each shipment, and third‑party testing is acceptable.
These heavy‑duty magnets generate extremely strong attraction from dozens up to hundreds of kilograms. Improper handling may cause crushing injuries, bone trauma or flying fragments. Operators must wear safety goggles and heavy‑duty gloves, use dedicated separating tools, keep limbs away from closing magnetic surfaces, and maintain distance from pacemakers and sensitive electronics. Request our full safety guideline from our sales engineers.
Powerful neodymium magnets require magnetic shielding for air freight. Fullzen has long‑term export experience with iron‑shielded packaging to pass airline inspection. Custom packages are also available for sea and ground transport. Our products have been delivered to over 30 countries with compliant magnetic‑goods logistics solutions.
Request Your Free Quote Today
Share your U‑shaped neodymium magnet dimensions, magnetization requirements and end‑application details, and Fullzen’s professional engineering team will deliver customized technical solutions and a quotation within 24 hours.
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