Fullzen Magnet is a large‑scale manufacturer of U‑shaped neodymium magnets based in Huizhou, China. With 10‑year‑long expertise in R&D and production of large‑size sintered NdFeB U‑magnets, we operate a 10,000 ㎡ manufacturing site equipped with in‑house slicing machines and mould workshop. We are capable of producing oversized U‑shaped magnets over 200 mm, with tested pull force up to 220 kg.
We offer full‑range customization for large U‑shaped magnets. Custom moulds can be developed according to your requirements for dimensions, pole gap, magnet grade, coating and mounting structure. We provide one‑stop OEM / ODM solutions with 10‑day fast sampling and engineering quotation available within 24 hours. Below are references of our large‑size standard models. Please contact our sales engineers directly for non‑standard specifications.
Large U-Shaped Magnet Product Lineup
Explore Fullzen's large U-shaped magnet models from 80mm to 150mm — pull force ranging from 68 kg to 220 kg, with SH and UH high-temperature grades for demanding industrial environments.
Selecting the right large U‑shaped magnet depends on your required pull force, installation space and operating temperature. The four representative models below cover pull‑force gradients from heavy‑duty to extra‑heavy‑duty. Custom sizes can go beyond 200 mm.
[Heavy Duty — 80 mm, 68 kg Pull Force]
FZ‑UL8060SH
Large U‑shaped magnet 80×60×12 mm, high‑temperature grade N45SH (max operating temperature ≤150 °C), 45 mm pole gap. Finished with black epoxy coating for high‑temperature and high‑humidity environments. Designed for automotive welding fixtures, welding tooling, heat‑treatment equipment and outdoor magnetic separation applications. This is our best‑selling base model among large‑size U‑magnet series.
[Extra Heavy Duty — 100 mm, 95 kg Pull Force]
FZ‑UL10080SH
Extra‑heavy‑duty U‑shaped neodymium magnet 100×80×15 mm, high‑temperature grade N42SH, 60 mm pole gap. Black epoxy coating, max operating temperature ≤150 °C. Tested pull force reaches 95 kg. Developed for large‑mold positioning, sheet‑metal handling, permanent magnetic 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]
FZ‑UL120100SH
Giant U‑shaped magnet 120×100×20 mm, high‑temperature grade N40SH, 75 mm pole gap. Black epoxy coating, max operating temperature ≤150 °C. Tested pull force of 140 kg. Specially built for magnetic assemblies of separation equipment, heavy‑duty permanent magnetic lifters, large steel‑plate handling chucks and heavy‑duty tooling fixtures. Auxiliary mounting base plate is required to avoid magnet chipping or cracking.
[Ultra Heavy Duty — 150 mm, 220 kg Pull Force]
FZ‑UL150120UH
Flagship oversized U‑shaped neodymium magnet, 150×120×25 mm, high‑temperature grade N38UH (max operating temperature ≤180 °C), 95 mm pole gap with black epoxy coating. Tested pull force up to 220 kg. Intended for heavy‑load magnetic separators, large‑scale permanent magnetic lifting equipment and steel‑mill slab‑handling systems. Larger custom sizes are available, maximum dimension over 200 mm.
*Pull‑force test condition: 20 mm thick mild‑steel plate, full flat surface contact, vertical pulling force at 25 °C room temperature. Large‑size U‑shaped magnets are highly sensitive to the thickness of the attracted workpiece. Insufficient steel‑plate thickness will result in significant pull‑force drop. A safety factor of 3‑4 is recommended for real‑world selection. Fullzen provides FEM finite‑element simulation calculation and practical test validation upon request.
| Model | Dimensions (mm) | Gap (mm) | Grade | Coating | Pull Force (kg)* | Max Temp | MOQ |
|---|---|---|---|---|---|---|---|
| FZ‑UL8060SH | 80×60×12 | 45 | N45SH | Black Epoxy | 68 | ≤150°C | 50pcs |
| FZ‑UL8060UH | 80×60×12 | 45 | N42UH | Black Epoxy | 62 | ≤180°C | 50pcs |
| FZ‑UL10080SH | 100×80×15 | 60 | N42SH | Black Epoxy | 95 | ≤150°C | 30pcs |
| FZ‑UL10080UH | 100×80×15 | 60 | N38UH | Black Epoxy | 85 | ≤180°C | 30pcs |
| FZ‑UL120100SH | 120×100×20 | 75 | N40SH | Black Epoxy | 140 | ≤150°C | 20pcs |
| FZ‑UL120100UH | 120×100×20 | 75 | N35UH | Black Epoxy | 125 | ≤180°C | 20pcs |
| FZ‑UL150120UH | 150×120×25 | 95 | N38UH | Black Epoxy | 220 | ≤180°C | 10pcs |
| FZ‑UL150120EH | 150×120×25 | 95 | N30EH | Black Epoxy | 195 | ≤200°C | 10pcs |
| Custom 200+ | Up to 200mm+ | Custom | N35‑N52 | Custom | Up to 350kg | ≤200°C | Quote |
Key Specifications at a Glance
Complete specification overview of Fullzen large U‑shaped neodymium magnets — size range, pull force, grade options, high‑temperature ratings, coatings and tolerance standards.
Understanding the core specifications of large U‑shaped magnets helps engineering teams complete preliminary selection evaluation before large‑scale equipment design.
• Standard size range: 80×60×12 mm → 150×120×25 mm (8 standard models)
• Maximum custom size: over 200 mm, maximum single‑piece pull force up to 350 kg
• Pull‑force range: 68 kg – 220 kg (tested values for standard models on 20 mm steel plate)
• Material: Sintered NdFeB (Nd₂Fe₁₄B）
• Standard grades: N35 / N40 / N42 / N45 / N48
• High‑temperature grades: SH (150 °C) / UH (180 °C) / EH (200 °C) — high‑temperature grades are recommended for large‑size magnets
• Remanence Br: 11.8 – 13.8 kGs
• Maximum energy product BHmax: 33 – 45 MGOe
• Dimensional tolerance: ±0.1 mm (standard) / ±0.05 mm (precision grade)
• Coating options: Black epoxy (preferred) / Ni‑Cu‑Ni / Parylene / Custom coatings
• Magnetization direction: Axial (N/S poles on two end faces); multi‑pole customization available
• Mounting options: Counter‑sink holes / threaded holes / steel housing encapsulation / custom mounting base plates
• Density: approx. 7.5 g/cm³
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.
The pull‑force of large U‑shaped magnets does not follow simple proportional scaling. According to magnetic‑circuit principles, pull‑force of a U‑magnet is roughly proportional to the cross‑sectional area of its pole pillars. Meanwhile, magnetic‑circuit efficiency improves with larger dimensions. Larger pole pillars bring a lower demagnetization factor and a higher operating working point. Consequently, a 150 mm U‑shaped magnet delivers far more than 1.5 times the pull‑force of a 100 mm model.
Fullzen’s real‑world test data illustrates this effect: FZ‑UL10080SH (100 mm width) achieves 95 kg pull‑force, while FZ‑UL150120UH (150 mm width) reaches 220 kg pull‑force. Width increases by only 50 %, yet pull‑force rises by 130 %. This is a practical engineering example of the magnetic‑circuit size‑effect. When selecting magnets for heavy‑duty equipment, do not extrapolate pull‑force proportionally from smaller‑size models. Always rely on actual test data or FEM simulation results.
Another unique advantage exclusive to large U‑shaped magnets is parallel assembly into complete magnetic systems. For magnetic separators and permanent magnetic lifters, dozens of U‑shaped magnets are arranged at defined intervals to build continuous magnetic assemblies, generating strong magnetic fields across the full working surface. Fullzen offers magnetic‑system design consultation and magnetic‑circuit simulation services to optimize your magnet‑layout solution.
If you require smaller‑size U‑shaped magnets, please refer to our strong U‑shaped neodymium‑magnet product line (5‑95 kg pull‑force range).
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.
Magnetic Separation Equipment
Magnetic separators represent the largest application field for large U‑shaped magnets. From mineral ore beneficiation and gangue sorting to scrap‑metal recycling, core magnetic assemblies of magnetic separation machines are mostly constructed with U‑magnet units. Fullzen supplies large‑size U‑shaped magnets and magnetic‑system assemblies for numerous magnetic‑equipment manufacturers. SH / UH high‑temperature grades and special wear‑resistant coatings are available to withstand harsh working conditions with dust, high temperature and mechanical impact.
Permanent Magnetic Lifters and Steel Handling
Permanent magnetic lifters, steel‑plate lifting chucks and billet‑handling fixtures adopt large U‑shaped‑magnet arrays as their core magnetic units. Our FZ‑UL120100SH and FZ‑UL150120UH are two most popular models for lifting‑equipment manufacturers. Combined with steel‑housing magnetic‑circuit design, a single magnetic assembly can easily deliver ton‑level pull force.
Heavy‑Duty Welding and Assembly Fixtures
Heavy steel‑structure welding, shipbuilding and heavy‑machinery assembly often involve multi‑ton workpieces requiring powerful positioning and clamping force. Paired with hydraulic or mechanical locking mechanisms, large U‑shaped magnets deliver fast and reliable positioning solutions for heavy‑duty workpieces. Our SH‑grade magnets maintain stable magnetic performance even within welding heat‑affected zones.
Mold and Die Quick‑Change Systems
For rapid mold change of large injection‑molds, stamping dies and die‑casting molds, conventional bolt‑locking takes hours, while magnetic mold plates complete the procedure within minutes. Large U‑shaped magnets act as key components of magnetic mold plates, delivering uniform and strong clamping force. Fullzen can customize magnet‑array solutions according to your mold‑plate dimensions and tonnage requirements.
Iron Removal in Processing Industries
Iron separators deployed in food, pharmaceutical, chemical and building‑material industries capture ferromagnetic impurities from raw materials and protect downstream equipment including crushers, mills and extruders. Permanent iron‑removal units built with large U‑shaped magnets hang above conveyor belts. They operate power‑free, maintenance‑free and continuously efficient. Our large‑size magnets have been applied in multiple cement and mine iron‑removal production lines.
Steel Mill and Metal Service Center Equipment
Steel‑mill slab handling, steel‑plate sorting at metal service centers and stock‑yard management in metal‑processing plants heavily rely on magnetic lifting tools and magnetic material‑handling machinery. Our oversized U‑shaped magnets (150 mm and above) with steel‑housing encapsulation provide core magnetic components for heavy‑duty magnetic equipment, serving multiple steel‑works and metal‑processing enterprises.
Custom Manufacturing for Large U‑Shaped Magnets
Fullzen provides full custom manufacturing for large U‑shaped magnet projects — custom sizes up to 200 mm+, high‑temperature grades, steel housing assemblies and magnetic‑circuit design support.
Most large U‑shaped‑magnet projects require custom solutions. Magnetic‑circuit designs differ for every magnetic separator, lifter and fixture. Fullzen delivers end‑to‑end custom services covering magnetic‑circuit design all the way to finished‑product delivery:
• Dimension customization: full‑range support from 80 mm to 200 mm+. Custom moulds available for special‑shaped cross‑sections and stepped structures
• Grade customization: N35‑N52 together with complete high‑temperature grades SH / UH / EH. Optimal grade recommendations based on actual operating‑temperature conditions
• Coating customization: black epoxy (preferred), wear‑resistant coating, anti‑corrosion coating, Parylene
• Structural customization: counter‑sink holes, threaded holes, mounting base plates, steel‑housing encapsulation and pre‑assembled magnetic systems
• Magnetic‑circuit design: FEM finite‑element simulation to optimize pole gap and magnet layout for guaranteed pull‑force performance
• Brand customization: laser marking, custom packaging and OEM private‑label manufacturing
For detailed custom workflows and capabilities, please visit our U‑shaped neodymium‑magnet customization service page.
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.
• U‑Shaped Magnets (Overview Page) — Full portfolio of 8 U‑magnet product lines
• Heavy‑Duty U‑Shaped Neodymium Magnets — Standard‑strength models with 5‑95 kg pull force, ideal for industrial fixtures and sensors
• Horseshoe Neodymium Magnets — Classic horseshoe profile for teaching equipment and precision instruments
• Miniature U‑Shaped Neodymium Magnets — For precision sensors and micro‑devices, minimum size down to 5 mm
• Custom U‑Shaped Neodymium Magnets — Full‑scale OEM / ODM customization. Drawings as production standard, fast sampling within 10 days
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.
What is the maximum size and pull force you can produce?
Our largest standard model is 150×120×25 mm (FZ‑UL150120UH) with tested pull‑force of 220 kg. Custom sizes can exceed 200 mm, delivering up to 350 kg pull‑force per piece. Larger specifications require steel‑housing magnetic‑circuit design; assembled magnetic systems can reach ton‑level total attraction force. Exact performance depends on your application and magnetic‑circuit solution.
How does pull force scale with magnet size?
Pull‑force does not grow in simple proportion. For U‑shaped magnets, pull‑force is roughly proportional to pole‑pillar cross‑sectional area, and magnetic‑circuit efficiency improves at larger dimensions, resulting in faster‑than‑linear force increase. For example: a 100 mm‑wide U‑magnet delivers 95 kg pull‑force, while a 150 mm‑wide unit reaches 220 kg. Width increases by only 50 %, yet pull‑force rises by 130 %. Always base your selection on actual test data; do not extrapolate proportionally from smaller models.
What grade should I choose for high‑temperature environments?
Large U‑shaped magnets are widely used in industrial equipment with elevated operating temperatures. SH grade (≤150 °C) is our general starting recommendation. For welding heat‑affected zones, heat‑treatment machinery or outdoor sun‑exposed conditions, UH grade (≤180 °C) is preferred. Select EH grade for extreme temperatures above 180 °C. Note: higher‑temperature grades deliver slightly lower room‑temperature pull‑force for equal volume, so comprehensive evaluation is required.
Can you provide steel housing or assembled magnetic circuits?
Yes. Large U‑shaped magnets are rarely used bare. Steel‑housing encapsulation concentrates magnetic flux, protects magnets and simplifies installation. Fullzen offers one‑stop services including steel housing fabrication, magnet assembly and complete magnetic‑circuit testing. Simply provide your magnetic‑circuit drawings or pull‑force requirements, and we will deliver a full solution.
What is the MOQ for large custom U‑shaped magnets?
MOQ for standard large‑size models ranges from 10‑50 pcs depending on specifications. Custom‑product MOQ varies with process complexity, generally starting at 10‑20 pcs. Given the high unit value of large U‑shaped magnets, we understand prototype‑testing needs and support small‑batch sampling. Please contact our sales engineer for quotation details.
How do you ensure quality for large magnet units?
Owing to their big dimensions and high value, every large U‑shaped magnet undergoes rigorous inspection. Fullzen applies stricter quality‑control standards for large‑size products: 100 % visual inspection, 100 % dimensional check, 100 % magnetic‑property testing (flux / gauss‑meter), and 100 % coating‑adhesion test. Material certificates and test reports accompany each shipment; third‑party re‑inspection is acceptable.
Are large neodymium magnets safe to handle?
Large U‑shaped neodymium magnets generate tremendous pull‑force (tens to hundreds of kilograms). Improper handling may cause severe injuries including pinching, bone fracture and flying fragments. Strict safety rules must be followed: wear safety goggles and heavy‑duty protective gloves, use dedicated separation tools, keep body parts away from gaps between magnets, and keep away from pacemakers and electronic devices. Request our detailed safety guidelines from Fullzen sales team.
How are large magnets packaged and shipped?
Powerful neodymium magnets require professional magnetic‑shielding packaging for air freight. With extensive export experience, Fullzen provides standard iron‑box magnetic‑shielding packaging to pass airport security smoothly. Corresponding packaging solutions are also available for sea and land transport. We export to 30+ countries and are familiar with shipping regulations for magnetic goods across different logistics channels.
Large U-Shaped Neodymium Magnets Manufacturer
Found your application? Send us your specs and get a quote with recommended grade, coating, and magnetization within 24 hours！
Other Types of Magnets
Recommend Reading
Post time: Aug-29-2026