Product Details
Exterior Threaded Pot Magnet – Screw‑In Neodymium Magnet for Secure Installation
For applications requiring a permanent magnet that can be easily installed, removed, or adjusted, the exterior threaded pot magnet offers a practical solution. Unlike plain pot magnets that rely on adhesives or press‑fit, the exterior male thread allows direct screwing into a tapped hole or through a panel with a nut, providing a secure, vibration‑proof mounting. This makes it ideal for machinery guards, removable access panels, sensor brackets, and industrial jigs where magnets need to be changed or repositioned frequently. Our exterior threaded pot magnets are manufactured using high‑grade N42 sintered neodymium (purity ≥95%) encapsulated in a zinc‑plated or nickel‑plated steel housing. The thread is precision‑rolled to class 6g tolerance, ensuring smooth engagement and consistent clamping force. The steel cup focuses magnetic flux onto the bottom face, delivering a pull force that can exceed 100 kgf in larger sizes. Available in metric threads (M4, M5, M6, M8, M10, M12) and imperial sizes, with custom thread lengths and magnet strengths to match your design. Every unit is tested for pull force and thread quality, backed by our IATF 16949 and ISO 9001 certified manufacturing processes.
Technical Specifications
Key Advantages of Threaded Pot Magnets
Tool‑Free Adjustable Mounting
The exterior threaded pot magnet can be screwed in or out to adjust the holding gap or to replace the magnet without disassembling the entire fixture. This saves time during maintenance and reconfiguration.
Vibration‑Resistant Fixing
Unlike adhesive‑bonded magnets, threaded pots stay firmly in place even under high vibration or shock loads. A lock nut can be added for extra security in demanding environments.
Compact, Self‑Contained Design
The integrated thread eliminates the need for separate mounting brackets or custom hardware, reducing component count and overall assembly complexity.
Quality and Precision – Made in Our Factory
Our integrated manufacturing facility produces the magnet core, steel cup, and thread in‑house. The neodymium magnet is sintered from 100% virgin rare‑earth materials (purity ≥95%) with a Ni‑Cu‑Ni coating to prevent corrosion. The steel cup is precision‑machined and threaded on CNC lathes, then zinc or nickel plated. The magnet is bonded into the cup with high‑strength epoxy, and the assembly is magnetized after threading to avoid debris adhesion. Each exterior threaded pot magnet is inspected for thread gauge fit, pull force (using a calibrated tester), and visual finish. We provide test certificates and material certifications for every batch. Our IATF 16949 and ISO 9001 systems ensure traceability and consistent quality for global customers.
Packaging & Shipping
Each threaded pot magnet is individually wrapped in foam or placed in custom‑molded trays to prevent thread damage. Outer cartons are reinforced for international shipping. Standard sizes ship within 7‑10 days; custom threads or lengths take 12‑15 days. Free samples available for qualified projects.
Export-Ready Packaging & Support
Our strength as a direct manufacturer lies in controlling the entire value chain. The NdFeB alloy is sintered in-house using ≥95% purity raw materials, then precision-ground. The steel cups are stamped, machined, and plated in our facility. This integration allows for rigorous quality checks at each stage-dimensional accuracy (tolerance down to ±0.05mm), coating thickness, and final pull-force verification-ensuring every strong neodymium pot magnet meets specification before shipment.
FAQ
Q1: What is an exterior threaded pot magnet, and how does it differ from a plain pot magnet?
A1: An exterior threaded pot magnet has a male thread machined on its outer steel shell. Unlike a plain pot magnet (smooth shell), this thread allows direct screwing into a tapped hole or mounting bracket. The magnet is fixed without additional fasteners. It is used for adjustable positioning or permanent installation. The thread is typically metric (M3–M20) or imperial (UNC). Thread length is usually 10–20 mm, and the magnet face protrudes from the thread end.
Q2: What are the main applications for an exterior threaded pot magnet?
A2: Common uses: sensor mounting, fixture stops, jig clamps, and adjustable catches. The thread enables precise height adjustment by screwing in/out. Used in industrial automation to hold workpieces or door stops. Also found in quality control – threaded magnets are inserted into drilled holes as magnetic pick‑up points. They are popular in machine guarding and welding fixtures because they can be replaced quickly without tools.
Q3: How do you install an exterior threaded pot magnet without damaging the magnet or thread?
A3: Use a wrench on the hexagonal nut or the wrench flats provided on the shell – never grip the magnet face. Apply anti‑seize compound to the thread to prevent galling, especially in stainless housings. Thread depth should not exceed the thread length to avoid crushing the internal magnet. Tightening torque: <5 Nm for M6, <10 Nm for M10 – over‑tightening cracks the NdFeB inside. Always screw into tapped holes that are clean and deburred.
Q4: What thread types and sizes are available for exterior threaded pot magnets?
A4: Common metrics: M4, M5, M6, M8, M10, M12, M16, M20 – pitch is standard (0.7–1.5 mm). Imperial: 1/4‑20, 5/16‑18, 3/8‑16, 1/2‑13. Thread length varies: 10 mm for small sizes, 25 mm for large. Fine pitch threads (e.g., M8x1) are less common but allow finer adjustment. Choose according to load: M6 holds ~20 kg, M10 holds ~50 kg. Check if the thread is right‑handed (standard) or left‑handed (special order).
Q5: Does vibration cause an exterior threaded pot magnet to loosen over time?
A5: Yes. Vibration can back the thread out, losing holding force. Use thread‑locking compound (medium strength, e.g., Loctite 243) or a jam nut to lock position. For high‑vibration environments (conveyors, engines), choose a design with a locking collar or an adhesive backing on the face. Regular inspection is recommended. Avoid using a standard flat washer – it reduces the effective thread engagement. A wave washer under the head provides preload to resist loosening.
Certifications
