Custom Strong Stainless Steel Permanent Magnetic Pulley Roller

The AstraRoll Technical Advantage

Engineering a permanent magnetic pulley for multi-ton industrial conveying requires advanced magnetic circuit simulation and bulletproof mechanical fabrication:

Permanent Magnetic Stability: Powered by premium-grade NdFeB or Ferrite permanent magnets, our pulleys require absolutely no electricity, wiring, or control panels to generate their magnetic field. We guarantee a magnetic force loss of less than 1% over a 100-year operational lifespan, delivering fail-safe separation even during complete facility power outages.

Deep Field Penetration Architecture: A magnetic pulley is only as good as its depth of reach. AstraRoll engineers utilize finite element magnetic modeling to design proprietary multi-pole axial or radial magnetic circuits. This ensures high magnetic flux density projects deep into thick burdens of bulk material passing over the belt, capturing ferrous items buried beneath non-magnetic product.

Hermetic Stainless Steel Construction: To survive abrasive mining ores, corrosive chemical washdowns, and outdoor weather, the internal magnetic core is completely enclosed within a heavy-wall SUS304 or SUS316L stainless steel cylinder. Seamlessly welded and polished, it completely prevents dust, moisture, and impact from damaging the permanent magnets.

360-Degree Self-Cleaning Separation: Unlike suspended overband magnets that require manual cleaning or auxiliary motorized belts, the magnetic pulley transforms your existing conveyor belt into a continuous, self-cleaning separator without adding any additional moving parts or mechanical complexity to your processing line.

Primary Applications

AstraRoll Permanent Magnetic Pulleys are the industry standard for automated tramp metal removal and resource purification:

Recycling & Waste Management: Separating steel cans, nails, and iron scrap from shredded plastics, municipal solid waste (MSW), and construction demolition debris.

Mining & Quarrying: Protecting expensive cone crushers, jaw crushers, and conveyor belts by removing excavator teeth, drill bits, and tramp iron from raw coal, limestone, and iron ore.

Grain, Food & Feed Processing: Purifying bulk wheat, corn, soybeans, and animal feed by capturing fine iron filings, wire fragments, and rust scale prior to milling or packaging.

Wood & Plastics Processing: Removing nails and staples from wood chips before pelletizing, and extracting metal from plastic regrind to protect injection molding screws.

Key Specifications

Please note: Every AstraRoll Permanent Magnetic Pulley is custom-built to match your conveyor belt width, belt speed, and burden depth.

Outer Diameter (O.D.): Custom from 150mm up to 1,000mm+.
Face Length: Custom manufactured from 300mm up to 2,500mm+.
Gauss Rating: 3,000 GS to 12,000 GS (Measured at the shell surface).
Magnetic Material: Sintered NdFeB (Rare Earth) or Strontium Ferrite.
Operating Temperature: ≤ 80°C standard (High-temperature rare-earth models up to 200°C available upon request).
Concentricity (TIR): CNC precision ground to ensure uniform belt tracking and prevent vibration.

Why Choose AstraRoll?

1. Customized Magnetic Circuit Simulation

Different materials require different magnetic field shapes. If you are separating heavy tramp iron (like 2-inch steel bolts) from heavy coal, you need a Radial Pole Circuit that projects a deep, far-reaching magnetic field. If you are separating fine iron powder (like 0.1mm filings) from a thin layer of food spice, you need an Axial/Crowded Pole Circuit that creates an ultra-high Gauss density directly at the pulley surface. AstraRoll analyzes your specific burden depth and contaminant profile to build the exact magnetic circuit your application demands.

2. Turnkey Drop-In Replacement

Upgrading your conveyor to automatic metal separation does not require redesigning your conveyor frame. Send us the engineering drawing of your current non-magnetic head pulley. We will CNC-machine the exact same shaft extensions, bearing journal diameters, keyways, and locking hubs onto your new stainless steel magnetic pulley, allowing your maintenance crew to swap it out in a matter of hours.

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.