High-Intensity Magnetic Bars (6000-14000 Gs): Complete SS316L Industrial Iron Removal Guide
Magnetic bars are essential purification equipment in modern industrial production. They are designed to remove ferromagnetic impurities from liquids, powders, and granular materials.
Built with high-performance sintered NdFeB magnets, our magnetic bars deliver a surface magnetic field of up to 14000 Gs. This powerful magnetic force greatly improves product purity. It also protects downstream precision equipment from metal wear and damage.
When choosing a magnetic bar, businesses need to focus on more than just magnetic strength. You should also consider high temperature resistance, stainless steel material and easy-to-clean design. Choosing the right magnetic bars solution is the key to safe, efficient production line operation.
What is a Magnetic Bar?
Magnetic bars (also known as magnetic rods or iron-removal bars) are core components in the industrial magnetic separation. It is a precision magnetic circuit system made of internal permanent magnets and an external stainless steel sleeve. The internal permanent magnets are mainly high remanence, high coercivity sintered NdFeB magnets. These magnets are sealed and welded inside a SS304, SS316, or SS316L stainless steel tube. Magnetic bars efficiently remove ferromagnetic impurities from various materials. This includes liquids, powders, granules, and slurries. They are the core component for material purification, equipment protection, and quality compliance in industrial production.
How Do Magnetic Bars Work?
The core working principle of a magnetic bar is to “capture iron impurities with strong magnetic force.” The whole process requires no electricity, no energy consumption, and no manual intervention during operation. Internally, the device houses high-strength permanent magnets. These magnets generate a stable and powerful “magnetic attraction zone” across the surface of the bar—much like a super-powered magnet capable of firmly gripping all ferromagnetic substances. When materials flow, fall, or come into contact with the magnetic bar during production, all ferromagnetic impurities in the material are instantly captured. This includes iron filings, iron powder, and rust. These impurities stick tightly to the outer wall of the magnetic bar. Clean materials are not affected by the magnetic force and they continue to flow normally through the production line. This achieves automatic separation of iron impurities from clean raw materials. In addition, the fully sealed stainless steel shell protects the internal permanent magnets. It works reliably even in humid, mildly corrosive environments. There is no risk of water ingress, rust, or magnet damage, which ensures long-term stable magnetic force.
Key Advantages Of Our Magnetic Bars
Super Strong Adsorption Force: Our magnetic bars can reach a surface magnetic field strength of up to 14,000 Gs, while covering a full range of specifications from 6,000 Gs to 13,000 Gs. They can capture fine iron powder and weakly magnetic impurities. Their iron removal and separation efficiency far exceeds that of conventional products in the industry.
Custom High-Temperature Resistance: Our standard magnetic bars operate in a temperature range of 80-350℃. We can also create custom high-temperature solutions for different hot working conditions. There is no irreversible demagnetization within the rated temperature range and the magnetic properties remain stable over a long period of time.
Food-grade Hygiene Compliance: Our magnetic bars go through 4 progressive precision polishing processes (from 120 mesh to 600 mesh). Every bar goes through 100% defect inspection and the surface finish can reach Ra0.6. This fully meets the hygiene standards and compliance requirements of the food, pharmaceutical and cosmetic industries.
High Protection & Long Service Life: We use a full argon arc welding sealing process. Every bar passes strict leak tests to ensure zero leakage, waterproof, and anti-fouling performance. The tube material can be selected from SS304/316/316L stainless steel, which is corrosion-resistant and wear-resistant. It maintains an ultra-long service life even under harsh working conditions.
Full Customized Capability: The maximum outer diameter can reach 100 mm, while the length can be fully customized to meet specific client requirements. We support multiple end fitting styles, including double-ended threaded holes, through-shaft filtration models, eye bolt models, smooth cylinder end plugs, male screw end plugs and so on. They perfectly fit different equipment and installation scenarios.
Full Process Quality Control: Every finished magnetic bar goes through 100% appearance inspection and surface gauss measurement. Before delivery, we use double-layer packaging: protective paper + custom plastic tube. This avoids damage from collision and magnetic attraction during transportation. It ensures the product is ready for use once it arrives at your facility.
Energy Saving & Environmental Protection: Magnetic bars use a pure permanent magnet structure. They require no electricity, produce no noise, and have zero energy consumption. This delivers extremely low long-term use costs.
Core Applications
Food & Beverage Industry: Installed in silos, chutes, crushers, mixers and pipelines for flour, starch, grains, sugar, salt, edible oil, dairy, condiments, snacks, confectionery, beverages, pet food and baking ingredients. They capture iron wires, filings and equipment wear particles to ensure food safety and full HACCP compliance.
Pharmaceutical & Cosmetic Industry: Used in production of medicinal powders, APIs, tablets, capsules, health supplements, cosmetic powders, creams, lotions, toothpastes and personal care products. Our food-grade polished magnetic bars eliminate metal contamination and meet strict GMP and hygienic production standards.
Chemical, Coating & Adhesive Industry: Installed in pipelines, tanks and reactors for paints, inks, pigments, resins, adhesives, sealants, detergents, fertilizers and industrial chemicals. They adsorb iron particles to prevent product blackening, defects and discoloration, significantly enhancing finished quality.
New Energy & Battery Industry: Essential for purification of lithium battery cathode/anode materials, graphite, lithium carbonate, LFP, electrolytes, separator materials and solar panel components. They strictly control metal impurity levels to prevent battery self-discharge and eliminate safety hazards.
Ceramic, Glass & Building Materials Industry: Remove iron and weakly magnetic impurities from quartz sand, kaolin, ceramic clay, glazes, frits, glass sand, refractory materials, cement, aggregates and tile raw materials. They prevent black spots, bubbles and defects, drastically increasing production yield.
Mining, Minerals & Recycling Industry: Used for continuous iron removal in ore processing, coal washing, sand and gravel production, solid waste recycling, plastic recycling, e-waste processing and scrap metal sorting. They fit seamlessly into various industrial and environmental protection equipment.
Applications of Magnetic Bars
How to Choose the Suitable Magnetic Bar?
To select the right industrial magnetic bar for your needs, it is recommended to consider the following five aspects. This ensures a perfect match for your working conditions, and avoids demagnetization or poor iron removal effects from wrong selection.
1. Choose Magnetic Strength Based on Material Fineness
For materials requiring the capture of micron-sized iron powder, such as powders, ultrafine powders, lithium battery raw materials, and fine chemical raw materials, we recommend using a high magnetic strength model of 10,000–14,000 Gs. For coarse iron removal scenarios with common grains and gravel, a standard model of 6000–8000 Gs can fully meet your iron removal needs.
Outer Diameter vs Maximum Gauss Rating Reference Table
| OD(mm) | 6000Gs | 7000Gs | 8000Gs | 10000Gs | 11000Gs | 12000Gs | 13000Gs | 14000Gs |
| Φ12 | √ | √ | √ | √ | – | – | – | – |
| Φ15 | √ | √ | √ | √ | √ | – | – | – |
| Φ20 | √ | √ | √ | √ | √ | √ | – | – |
| Φ25 | √ | √ | √ | √ | √ | √ | √ | √ |
| Φ35 | √ | √ | √ | √ | √ | √ | √ | √ |
| Φ50 | √ | √ | √ | √ | √ | √ | √ | √ |
| Φ100 | √ | √ | √ | √ | √ | √ | √ | √ |
2. Choose Magnet Temperature Grade Based on Working Temperature
Standard N-grade magnets are prone to irreversible permanent demagnetization when the environment exceeds 80℃. For normal temperature working conditions, standard N-grade magnetic bars are suitable. For high temperature scenarios such as ovens, high-temperature production lines, and high-temperature silos, you must choose custom models with high temperature resistant magnets such as EH and UH grades. Please provide your actual working temperature when placing an order, and we will accurately match the anti-demagnetization solution for you.
3. Choose Tube Material Based on Industry Working Conditions
For food, pharmaceutical, cosmetic, lithium battery, ceramic industries, and scenarios with strong acid, alkali, corrosive liquids or slurries, we prioritize SS316L stainless steel magnetic bars. They have excellent corrosion and rust resistance, and meet food-grade standards. For common dry powder, normal temperature, non-corrosive working conditions, SS304 stainless steel offers a higher cost performance.
4. Confirm Installation Size Based On On-site Structure
Measure the inner diameter of the equipment pipeline, the installation space of the silo/hopper, and the effective installation length in advance. Use this to determine the outer diameter and overall length of the magnetic bar, to avoid size mismatch and installation failure.
5. Select End Fitting Style Based On Equipment Structure
According to your on-site installation method, you can choose from a variety of end fitting styles: smooth flat head, external thread, internal thread, eye bolt, cone head and more. They fit different installation structures such as magnetic racks, pipelines, material boxes, and grilles.
FAQs
Q1: What is the maximum Gauss value of your magnetic bars?
A1: Our magnetic bars can reach a maximum stable surface strength of 14000 Gs. We also offer standard strengths from 6000 Gs to 13000 Gs, and can fully customize magnetic strength to meet your specific iron removal requirements.
Q2: Are your magnetic bars suitable for food and pharmaceutical production? Do they meet hygiene standards?
A2: Yes. Our magnetic bars use food-grade stainless steel, with 4-step precision polishing (120-600 mesh) to Ra0.6 finish. No pores, dead corners or residue. Full argon arc welding ensures zero leakage, water resistance and anti-fouling. They fully meet food and pharmaceutical hygiene standards.
Q3: What is the working temperature range of your magnetic bars? Will they demagnetize under high temperature?
A3: Our magnetic bars have a standard working temperature range of 80℃ to 350℃. Custom high-temperature resistant models are also available. No irreversible demagnetization within rated range.
Q4: Can you customize magnetic bar sizes? What end fittings do you offer?
A4: Yes, we offer full customization. Maximum outer diameter is 100mm, and length can be tailored to your installation space. Available end fittings include double-threaded holes, through-shaft, eye bolt, smooth cylinder, male screw, and cone ends to fit all equipment.
Q5: What daily maintenance do magnetic bars require?
A5: Maintenance is simple. Just regularly remove and clean iron buildup from the surface. Avoid prolonged exposure to strong acids/alkalis, overheating, and heavy impact. This ensures long-term stable magnetic performance.
Contact Us
High-quality magnetic bars are the first line of defense for industrial purification. From material selection to magnetic circuit design, every detail is critical to ensuring the safety of your production operations. XF Magnet has more than 20 years of R&D experience in NdFeB magnets. Our magnetic rods feature magnetic field strengths reaching up to 14,000 Gauss and temperature resistance up to 350℃, utilizing a fully welded, sealed 316L stainless steel construction that meets food-grade standards. Contact us info@xf-magnet.com for one-to-one working condition matching and professional magnetic separation solutions.