| 1 | High-Strength Neodymium Channel Magnet | Sintered neodymium–iron–boron (NdFeB), commonly grades N35–N52 | Very high magnetic energy density in a compact channel. Suitable where a strong holding force is required from a small footprint. | Common standard grades: approximately 80°C; high-temperature grades can be specified above this range. | NdFeB is vulnerable to oxidation. Nickel-based, epoxy, zinc, or other specified coatings may be used; coating damage can expose the magnet. | Confirm RoHS and REACH status, restricted-substance declarations, magnetized-parts packaging, pinch-point warnings, and transport documentation where applicable. | Request pull-force data at a defined air gap, coating specification, temperature coefficient, dimensional tolerances, and batch test records. |
| 2 | Rubber-Covered Neodymium Channel Magnet | NdFeB magnet assembly with molded or bonded rubber protection | High holding force with improved surface protection and reduced sliding on painted, coated, or delicate steel surfaces. | Often approximately 60–80°C, depending on magnet grade, rubber compound, adhesive, and molding process. | Rubber can reduce direct exposure to moisture and scratching, but seams, cuts, and bonding interfaces require inspection. | Verify rubber material restrictions, odor and emissions requirements for the destination market, RoHS/REACH documentation, and product safety labeling. | Check rubber hardness, adhesion strength, UV and oil resistance, edge sealing, and performance after repeated attachment cycles. |
| 3 | Ferrite Channel Magnet | Hard ferrite, also called ceramic ferrite | Moderate holding force with good cost efficiency, stable supply, and strong resistance to demagnetization in ordinary applications. | Commonly approximately 150–250°C, depending on grade and assembly design. | Generally good corrosion resistance and usually usable without a metallic protective coating, although the ceramic material is brittle. | Confirm RoHS and REACH declarations, ceramic fracture controls, sharp-edge prevention, packaging integrity, and quality-system records. | Verify ferrite grade, dimensional accuracy, chipping limits, pull-force consistency, and resistance to thermal cycling. |
| 4 | Alnico Channel Magnet | Aluminum–nickel–cobalt alloy | Good magnetic stability at elevated temperatures and a relatively low reversible temperature coefficient compared with many rare-earth magnets. | Often approximately 450–550°C, subject to magnet geometry and the channel assembly. | Better environmental stability than uncoated NdFeB, but the steel channel, welds, and exposed surfaces still need corrosion assessment. | Confirm alloy composition, material traceability, RoHS/REACH status, high-temperature safety instructions, and occupational handling controls. | Request temperature-versus-holding-force curves, demagnetization limits, alloy certificates, and heat-treatment records. |
| 5 | Samarium Cobalt Channel Magnet | Sintered samarium–cobalt (SmCo) | Very high magnetic performance with excellent resistance to elevated temperature and irreversible demagnetization. | Common grades support approximately 250–350°C; the complete assembly may have a lower limit. | Generally better corrosion resistance than NdFeB, but the sintered material remains brittle and may require protective handling. | Verify RoHS/REACH declarations, rare-earth material traceability, brittle-component packaging, safety markings, and high-temperature use instructions. | Confirm operating-temperature rating for the full channel, allowable mechanical shock, coating or sealing method, and lot-to-lot magnetic consistency. |
| 6 | Stainless-Steel Encased Channel Magnet | Permanent magnet core, commonly NdFeB or ferrite, inside a stainless-steel housing | Adds mechanical protection, improved cleanability, and better resistance to splash, abrasion, and handling damage. | Typically limited by the magnet core, adhesive, and seal; commonly approximately 80–150°C. | Stainless steel improves external durability, but grade selection, weld quality, crevice sealing, and galvanic compatibility remain important. | For food, pharmaceutical, or hygienic applications, verify material grade, cleanability, weld finish, sealant compliance, and foreign-material control requirements. | Request stainless-steel grade, surface roughness where relevant, leak-testing method, weld inspection records, and magnet retention testing. |
| 7 | Countersunk Screw-Mount Channel Magnet | Usually NdFeB or ferrite with a countersunk steel or stainless-steel channel | Provides repeatable mechanical fastening and positive positioning, reducing reliance on adhesive alone. | Usually approximately 80–150°C, depending on magnet material, screw hardware, and any adhesive used. | Fastener and housing materials should be matched to the installation environment; exposed recesses can collect water or debris. | Confirm thread and dimensional standards, torque instructions, RoHS/REACH status, pinch-point warnings, and safe installation documentation. | Verify countersink angle, screw compatibility, shear and pull-off loads, torque limits, and resistance to vibration or loosening. |
| 8 | Adhesive-Backed Channel Magnet | Permanent magnet assembly with pressure-sensitive adhesive or structural adhesive | Fast installation on non-ferrous or difficult-to-drill surfaces; useful for signage, fixtures, sensors, and removable panels. | Often approximately 70–120°C, depending on adhesive chemistry and dwell time. | The adhesive joint can be affected by moisture, oil, dust, plasticizer migration, UV exposure, and surface-energy differences. | Verify adhesive chemical declarations, RoHS/REACH status, indoor or outdoor suitability, flammability information where required, and installation warnings. | Test peel and shear strength on the actual substrate after environmental aging, and specify surface preparation and cure or dwell requirements. |
| 9 | Deep-Pot or Deep-Channel Magnet | Usually NdFeB or ferrite in a deep ferromagnetic cup or channel | The steel pot concentrates magnetic flux toward the working face and helps protect the magnet from impact and side loading. | Typically approximately 80–200°C, governed by the core material, adhesive, and housing design. | The housing may require zinc, nickel, epoxy, or stainless-steel protection depending on humidity and chemical exposure. | Confirm housing material, coating thickness, RoHS/REACH status, mechanical retention, safety warnings, and packaging for strong magnetic assemblies. | Ask for rated pull force on specified steel, working air gap, shear-load data, housing dimensions, and adhesive or crimp-retention validation. |
| 10 | Low-Profile Flexible Magnetic Channel | Flexible ferrite or bonded rare-earth magnetic strip in a polymer or metal channel | Conforms to mildly curved surfaces and supports lightweight removable fixtures, covers, displays, and enclosure components. | Commonly approximately 60–100°C, depending on polymer binder, backing, and adhesive system. | Polymer encapsulation can improve moisture resistance, but flexibility, plasticizer migration, UV exposure, and edge sealing should be evaluated. | Verify polymer and adhesive declarations, RoHS/REACH status, flammability requirements for the application, labeling, and safe-cutting instructions. | Check minimum bend radius, length tolerance, magnetic orientation, aging performance, surface compatibility, and pull force after repeated flexing. |
