High-efficiency engineered side formwork systems with integrated magnetic locking mechanisms for precast concrete components.
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Super strong salvage and recovery magnetic systems using double-faced high-grade neodymium structures.
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Round base neodymium pot magnets featuring countersunk holes for secure screw and bolt installations.
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Square and rectangular NdFeB magnetic sheets optimized for industrial motors and spatial field configurations.
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High-grade carbon steel encased precast concrete shuttering magnet, delivering 1800kg of vertical holding power.
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High-temperature resistant SmCo permanent magnets custom-profiled for high-speed electric motor rotors.
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Flexible polyurethane magnetic chamfering strips designed to form neat chamfered edges on concrete structures.
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Engineered formwork magnetic fixtures featuring double and single chamfers for modular concrete manufacturing.
Request Export DetailsLarge ring magnets represent the pinacle of precision powder metallurgy. Whether constructed from Neodymium Iron Boron (NdFeB), Samarium Cobalt (SmCo), or Hard Ferrite, these components require complex electromagnetic orientation. Standard ring geometry forces specific magnetic flux boundaries, requiring precise control over axial, radial, or multi-polar magnetization patterns.
For industrial applications such as MRI machinery, wind turbine generators, and magnetic bearing systems, the uniformity of the magnetic field (homogeneity) along the internal diameter (ID) and external diameter (OD) is critical. Even a 0.5% deviation in radial flux density can lead to vibrational instability in high-speed rotating machines. That is why engineers specify tight geometric tolerances and rigorous material testing profiles when sourcing large rings.
Choosing the correct rare earth alloy is essential to prevent thermal demagnetization in high-duty operations. We manufacture rings across diverse magnetic classes:
China controls over 85% of the global rare-earth supply chain. Qianci Magnet leverages this strategic resource integration to offer unparalleled engineering precision, cost optimization, and logistic continuity.
By sourcing raw materials directly from northern and southern Chinese rare-earth mining hubs, we eliminate global intermediary markups. This ensures a consistent supply of dysprosium (Dy) and terbium (Tb), which are crucial for maintaining the high-coercivity performance of large NdFeB ring magnets.
Processing large rings with outer diameters exceeding 500mm requires specialized CNC wire-cutting, double-disc grinding, and high-coercivity magnetization fixtures. Our factory achieves dimensional tolerances as tight as ±0.05mm, preventing structural cracks during assembly.
To withstand harsh working environments, we offer specialized protective finishes. These include multi-layer Nickel-Copper-Nickel (Ni-Cu-Ni), high-adhesion Epoxy resin, Passivation, and Teflon coatings, which are tested through 96 to 500-hour salt spray procedures.
Modern mega-watt wind turbines rely on permanent magnet generators (PMG) to reduce maintenance cycles. Large NdFeB ring magnets, split into precision segmented arcs, provide the intense magnetic field required to generate clean power at variable low speeds. By eliminating gearboxes, wind farms improve reliability and operating efficiency.
Magnetic Resonance Imaging (MRI) requires highly uniform, stable magnetic fields. Large samarium cobalt and neodymium ring magnets serve as core gradient and alignment sensors. Any thermal drift can skew medical imaging diagnostics. Our specialized heat treatment processes minimize reversible temperature coefficients, maintaining system calibration over decades of continuous hospital use.
Integrating large-scale high-power magnetic assemblies is transforming the construction sector. By utilizing strong neodymium shuttering systems, precast concrete factories can anchor formwork onto steel tables without damaging the casting platforms. This structural design, pioneered by QCM Magnet, reduces installation time by up to 70%, facilitating rapid urban infrastructure development.
In aerospace applications, frictionless magnetic bearings support rotating shafts at extremely high RPMs. Large SmCo ring magnets operate efficiently in vacuum and cryogenic conditions, ensuring zero component wear, zero lubrication needs, and minimal energy loss. This technology is vital for satellite gyroscopes, flywheel energy systems, and high-performance turbine designs.
QCM Magnet specializes in offering complete magnetic fixing solutions for the production of precast concrete components. Our primary products include Shuttering Magnets and their corresponding accessories, Formwork Magnets, Magnetic Chamfering Strips, and various pre-embedded insert magnets. Utilizing magnetic fixing in precast concrete component production prevents damage to the platform, enhances work efficiency, reduces labor costs, and promotes economic efficiency as the magnetic fixing devices are reusable.
Using our expertise in magnetic components and our extensive experience in supporting the production of precast components, we have developed numerous new and practical magnetic fixing products. Our products come with complete specifications, excellent quality, ease of operation, and long service life. Additionally, we can promptly customize a variety of magnetic fixing parts to meet the diverse needs of our customers.
We are willing to share our expertise with you to help you solve your specific application needs for magnetic components.
Qianci Magnet is a strong magnetic component factory, specializing in the production and research and development of formwork magnets, magnetic formwork, insert magnets, magnetic concrete chamferers and other products.
Our business mainly involves precast concrete magnetic system solutions, helping you to better carry out concrete element production.
Become a global leading manufacturer and excellent service provider of magnetic solutions for the precast concrete industry.
All production facilities adhere to ISO 9001 and IATF 16949 quality management systems to guarantee magnetic consistency.
Engineered for light walls and solid floor slabs. 1000kg force with quick-release levers.
Optimal vertical shear strength for industrial concrete wall elements.
Reinforced carbon steel construction designed for heavy formwork panels.
Compact, highly efficient magnet box with solid steel push button system.
Perfect for modular internal divider walls and structural column casting.
Heavy-duty 2400kg pull force box favored across leading European precast yards.
Ultra-strength magnetic fixture engineered to hold dense multi-layer formwork.
Optimal weight-to-force ratio. Delivering 2100kg holding power with minimum footprint.
Essential technical considerations for global industrial buyers and design engineers.
Axial Magnetization: The magnetic poles are located on the flat circular surfaces (top and bottom faces of the ring). This is common for holding systems, magnetic couplings, and linear actuators.
Radial Magnetization: The magnetic poles are oriented around the circumference (either from the inner diameter outward, or vice-versa). Radial rings are essential for high-performance brushless permanent magnet motors (BLDC) and magnetic bearings because they offer a uniform magnetic field across the rotor surface. True radial sintering is technically complex and requires specialized multi-polar alignment tooling during the pressing phase.
Large rare earth rings are prone to warping and structural stress micro-cracks during the high-temperature sintering stage. To mitigate this, we employ near-net-shape molding techniques. Following sintering, we use precision CNC grinding machines and wire-cut EDM to machine the internal diameter (ID), outer diameter (OD), and thickness. This process allows us to maintain tight tolerances down to ±0.05mm, which are verified via Coordinate Measuring Machines (CMM) and laser micrometer arrays.
For applications experiencing operational heat (such as industrial drive shafts or downhole drilling equipment), we add dysprosium (Dy) and terbium (Tb) to NdFeB alloys. This increases their intrinsic coercivity (Hcj), enabling the material to resist demagnetization at temperatures up to 220°C (AH and EH classes). When operating temperatures exceed 250°C, we recommend Samarium Cobalt (SmCo) alloys, which remain stable up to 350°C without significant flux loss.
According to IATA regulations, magnetized materials must be shielded to prevent interference with aircraft navigation instruments. We pack large ring magnets using heavy iron sheets as magnetic shunts inside thick wooden crates. This method contains the magnetic field inside the package, ensuring it measures less than 0.00525 gauss at a distance of 4.6 meters, allowing for safe air transport clearance.
Precast concrete systems: Shuttering molds shape edges/openings on flat surfaces using magnetic fixation, while mold elements define the primary load-bearing walls.
QCM, a global leader in magnetic components, will participate in UK Construction Week 2025. From May 7th to 9th, at NEC Birmingham, showcasing magnetic fixings...
Proven safe and efficient tool featuring 1600kg pull force. High reusability and durability.
Significantly increases productivity and quality improvement across construction yards.
Popular across Europe. Ideal for residential construction walls and structural columns.
Perfect for anchoring side moldings on flat floor slabs and precast panels.
Direct manufacturer supply of heavy-duty formwork neodymium magnets with custom adapter interfaces.
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Nickel-treated permanent arc neodymium magnets optimized for high-efficiency electric motors and generators.
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High-strength mechanical rebar splicing sleeves designed for structural precast concrete column assemblies.
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High-magnetic-grade rare earth blocks with premium coating options, delivering industrial-strength magnetic force.
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Super strong neodymium magnetic hook systems for heavy-duty storage, hanging, and workshop organization.
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High-pull-force double-sided salvage magnets designed for professional river search and heavy recovery operations.
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Industrial magnetic thread fixing discs designed specifically for embedding anchor inserts in precast concrete.
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Ultra-high energy product rare earth block magnets optimized for specialized aerospace and laboratory equipment.
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