Custom High-Intensity Stainless Steel Magnetic Rollers
Product Overview:
In bulk material processing—ranging from grain and seed cleaning to plastic recycling and mineral purification—ferrous contamination is a critical hazard. Tramp iron and microscopic rust particles not only degrade final product purity but can also cause catastrophic damage to downstream crushers and mills. The AstraRoll Custom High-Intensity Stainless Steel Magnetic Roller provides an automated, continuous separation solution. Installed as the head drive or tail pulley on a conveyor system, this roller features an incredibly powerful internal core of Rare Earth Neodymium (NdFeB) magnets, encased within a rugged, fully welded stainless steel shell. Generating magnetic fields up to 18,000 Gauss, it effortlessly captures massive tramp metal as well as microscopic, weakly paramagnetic dust. As the conveyor belt rotates over the roller, clean product falls freely following its natural trajectory, while ferrous contaminants are held tightly to the belt, safely discharging underneath the conveyor into a separate collection chute. This passive, zero-energy mechanism guarantees ultimate product purity and equipment protection
Roll Function: Conveyor Roller, Material Handling
Industry Applications: Industry, Mining, Agriculture, New Energy, Electronics, Food
Inquiry Email: sales@astraroll.com
Custom High-Intensity Stainless Steel Magnetic Rollers Details
The AstraRoll Technical Advantage
We engineer our magnetic rollers to deliver unparalleled separation efficiency in demanding bulk environments:
Ultra-High Intensity Neodymium Core: We do not use weak ferrite magnets. By utilizing premium-grade NdFeB rare earth magnets arranged in a proprietary Halbach-array or specialized axial pole configuration, we project a deep, penetrating magnetic field up to 18,000 Gauss through the stainless steel shell and conveyor belt.
Continuous, Self-Cleaning Operation: Unlike magnetic grates that require manual halting and cleaning, the magnetic roller is entirely self-cleaning. The continuous motion of the conveyor belt automatically transports and discharges the captured iron underneath the roller, ensuring zero production downtime.
Fully Welded Stainless Steel Enclosure: The magnetic core is hermetically sealed inside a heavy-walled SUS304 or SUS316L stainless steel tube. This protects the sensitive rare earth magnets from moisture, corrosive chemicals, and physical impact, ensuring strict food-grade and hygienic compliance.
Zero Energy Consumption: Because the roller utilizes permanent rare earth magnets, it requires no electrical power to generate its massive magnetic field, rendering it completely immune to power outages and significantly lowering facility operating costs.
Key Specifications
Please note: We manufacture entirely to your specific conveyor frame, belt width, and required Gauss rating.
Outer Diameter (O.D.): Custom from 76mm up to 400mm+.
Face Length: Custom manufactured to match your exact belt width (up to 2,000mm+).
Maximum Magnetic Strength: Up to 18,000 Gauss (Surface reading).
Magnet Type: Sintered NdFeB (Rare Earth Permanent Magnets).
Shaft Configuration: Keyed, milled flats, or custom bearing housings to serve as a direct drop-in replacement for your existing head pulley.
Why Choose AstraRoll?
1. Precision Agricultural Sorting
In the seed and grain industry, clods of soil or small stones often contain trace amounts of iron oxide. AstraRoll's ultra-high-intensity 18,000 Gauss rollers are so powerful that they can detect these microscopic iron traces, successfully separating paramagnetic soil and rocks from clean wheat, paddy, and beans—a feat impossible with standard magnetic equipment.
2. Custom Magnetic Field Penetration
A high surface Gauss reading means nothing if your conveyor belt is too thick. AstraRoll engineers calculate the exact magnetic circuit required not just at the roller's surface, but at the specific operational depth above your conveyor belt. We guarantee the magnetic field will deeply penetrate your material burden depth to pull contamination from the very top of the product flow.
Frequently Asked Questions (FAQs)
Q: Will the permanent magnets lose their strength over time?
A: Under normal operating conditions, Rare Earth Neodymium magnets are incredibly stable and will lose less than 1% of their magnetic strength over a 10-year period. The only factor that can permanently degrade their strength is extreme heat. If your process involves high heat, please specify this, and we will utilize high-temperature-rated NdFeB magnets.
Q: Can this magnetic roller replace the existing drive pulley on my conveyor?
A: Yes. We frequently manufacture magnetic rollers to act as the primary head (drive) pulley. We can machine the shaft with the exact keyways required for your motor's gearbox and even apply a specialized thin-layer rubber or polyurethane lagging over the stainless steel to ensure the belt does not slip under heavy loads.
Q: Does the stainless steel shell block the magnetic field?
A: We use non-magnetic austenitic stainless steel (like SUS304 or 316L) for the outer shell. While it creates a physical gap between the magnet and the material, it does not magnetically shield or block the magnetic flux lines. We factor the shell thickness into our magnetic circuitry calculations to ensure the rated Gauss reaches your material.
Q1. Are you a trader or direct factory?
We are a direct manufacturing factory with over 20 years of expertise in high-end industrial rollers, casters and material handling solutions. Our facility operates with ISO-certified quality management systems, allowing us to maintain full control over production cycles and quality standards. Throughout two decades of growth, we have established deep, long-term strategic partnerships with several listed companies and global automation leaders, proving our reliability as a high-tier industrial supplier.
Q2. What are your main products?
AstraRoll specializes in the engineering and production of three core product lines: Industrial Rollers, Heavy-Duty Wheels, and Precision Casters. We do not just sell components; we provide integrated movement and transport solutions. Our products are widely utilized across high-demand sectors, including: New Energy, Lithium Battery, Mining, Heavy Industry, Medical Institutional, Agriculture and Logistics.
Q3. What about delivery time?
We deeply understand that project timelines are critical.
Standard Products: Usually dispatched within 7–15 working days if the components are in stock.
Customized/OEM Orders: Depending on the complexity and volume, the lead time typically ranges from 20–35 days. This includes time for technical drawing confirmation, specialized tooling, and rigorous pre-shipment testing.
Shipping Methods: We offer flexible global logistics solutions, including FOB and CIF terms. We ship via Sea Freight (for bulk industrial orders), Air Freight (for urgent project needs), and International Express (DHL/FedEx/TNT) for smaller components or samples.
Q4. How can I get a quote for customized products?
Since a significant portion of our business involves specialized engineering, pricing is tailored to your specific technical requirements. To provide an accurate quote, please provide the following details: Technical Drawings or Sketches, Application Environment, Quantity, Special Requests. Our engineering team typically reviews and responds to custom inquiries with a formal quotation within 24–48 hours.
Q5. What is your payment?
TT / Paypal / Western Union / LC / Credit Card etc. are all available to us.
