Ferrite Pot Magnets
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Ferrite pot magnets are economical magnetic holding assemblies made by mounting a ceramic ferrite magnet inside a steel cup, channel or mounting base. The steel housing helps concentrate magnetic flux at the working face, while the ferrite magnet provides stable performance, good corrosion resistance and reliable holding force for general industrial use.
Compared with NdFeB pot magnets, ferrite pot magnets have lower magnetic strength but offer better cost stability, natural oxidation resistance and strong temperature tolerance. They are widely used where the holding requirement is moderate, the installation surface is steel and the project needs a durable, cost-effective magnetic base.
Ningbo Vanguard Technologies supplies custom ferrite pot magnets in flat, countersunk, threaded, hook, channel and rubber-protected structures. We support magnet grade selection, steel cup design, machining, coating, assembly, magnetization, pull-force testing and batch inspection for fixtures, signage, hardware and industrial mounting products.
Whether you need a standard ferrite holding magnet or a custom magnetic base, Vanguard can provide sample production within 10-15 days after size, mounting style, coating and pull-force requirement are confirmed.
The following sizes are commonly used for ferrite pot magnets. Pull force values are reference data measured on a clean, flat and sufficiently thick steel plate. Actual holding force is affected by steel thickness, paint, air gap, surface roughness, load direction and vibration.
| Model | Pot Diameter | Total Height | Mounting Type | Thread / Hole | Typical Pull Force | Common Use |
|---|---|---|---|---|---|---|
| FPM-D16 | 16 mm | 5-7 mm | Flat / countersunk | M3 / 3.5 mm hole | 1-2 kg | Small labels, light signs, compact holders |
| FPM-D20 | 20 mm | 6-8 mm | Countersunk / female thread | M4 | 2-4 kg | Display hardware, light brackets, panels |
| FPM-D25 | 25 mm | 7-9 mm | Female thread / countersunk | M4 / M5 | 4-6 kg | Signs, tool holders, removable fixtures |
| FPM-D32 | 32 mm | 8-10 mm | Male thread / female thread | M5 / M6 | 6-10 kg | General mounting bases, light-duty steel holding |
| FPM-D36 | 36 mm | 8-11 mm | Hook / threaded type | M6 | 8-12 kg | Magnetic hooks, workshop holders, warehouse labels |
| FPM-D40 | 40 mm | 9-12 mm | Female thread / countersunk | M6 | 10-15 kg | Machine covers, steel-frame attachment, fixtures |
| FPM-D48 | 48 mm | 10-13 mm | Male thread / hook type | M6 / M8 | 15-22 kg | Hardware mounts, temporary stops, medium signs |
| FPM-D60 | 60 mm | 12-16 mm | Female thread / custom base | M8 | 25-35 kg | Industrial fixtures, inspection tools, mounting bases |
| FPM-D75 | 75 mm | 14-18 mm | Threaded / hook / channel | M8 / M10 | 40-60 kg | Large signs, steel support points, holding blocks |
| FPM-D88 | 88 mm | 16-22 mm | Custom threaded / channel | M10 / M12 | 60-85 kg | Large magnetic bases and custom ferrite assemblies |
| FPM-D100 | 100 mm | 18-25 mm | Custom housing | M10 / M12 | 80-120 kg | Heavy ferrite holding bases and steel work fixtures |
Ferrite pot magnets can be customized by magnet grade, steel cup structure, coating, thread size and pull-force target. Final values are confirmed according to drawing and application test conditions.
| Item | Available Options | Engineering Notes |
|---|---|---|
| Magnet Material | Hard ferrite, ceramic ferrite, C5/C8, Y30/Y30BH/Y35 | Ferrite is selected for stable cost, corrosion resistance and moderate holding force. |
| Pot Magnet Type | Flat pot, countersunk pot, internal thread, external thread, hook, channel magnet | Mounting structure is selected according to installation direction and load type. |
| Housing Material | Low-carbon steel cup, painted steel base, custom steel channel | Steel cup concentrates flux and protects the ceramic magnet from impact. |
| Mounting Feature | M3-M12 thread, countersunk hole, through hole, hook, screw boss | Thread size and cup thickness should match screw torque and safety factor. |
| Surface Treatment | Zn plating, paint, epoxy, black coating, rubber protection | Ferrite itself resists corrosion; coating mainly protects steel housing and improves appearance. |
| Working Temperature | Commonly up to 200-250 °C depending on assembly design | Adhesive, coating and mounting parts should also be checked for temperature resistance. |
| Inspection | Dimension, appearance, thread, coating, magnetization, pull force | Pull force can be tested on specified steel plate thickness and surface condition. |
| Factor | Influence on Holding Force | Recommended Check |
|---|---|---|
| Steel Thickness | Thin steel may not carry enough magnetic flux. | Test with the same steel thickness used in the final installation. |
| Air Gap | Paint, rubber, dirt or uneven surfaces reduce holding force. | Confirm the real contact gap before deciding model size. |
| Load Direction | Side load and vibration reduce effective holding force. | Use screws, stops or brackets for shear-load applications. |
| Temperature | Ferrite tolerates heat well, but assembly materials may limit use. | Check adhesive, coating and rubber temperature ratings. |
| Surface Condition | Rough, curved or painted steel reduces contact area. | Use larger diameter or custom housing if the surface is not flat. |
Vanguard can customize ferrite pot magnet diameter, height, steel cup profile, ferrite grade, thread size, countersunk hole, hook structure, rubber protection, coating, marking and packaging. For projects with target cost limits, we can help compare ferrite and NdFeB options by size and holding force.
Assembly support: We provide ferrite magnet insertion, steel cup machining, thread processing, coating, magnetization, polarity marking and pull-force testing.
Project review: For outdoor, high-temperature or vibration applications, our engineering team can recommend suitable coating, housing thickness and safety factor.
Production starts with ferrite magnet selection and steel cup machining. The ceramic magnet is assembled into the housing with adhesive or mechanical retention, then combined with threaded inserts, hooks, countersunk structures or channel bases according to the drawing.
Finished assemblies are coated or painted when required, magnetized, pull-force tested, inspected for dimension and appearance, and packed with separators to protect the working face during transportation.
Pull-force testing: Vertical pull force can be tested with specified steel plate thickness and surface condition.
Dimensional control: Diameter, height, thread, countersunk angle, flatness and assembly appearance are inspected per drawing.
Surface verification: Coating thickness, paint appearance, rubber condition and adhesion can be checked according to product type.
Documentation: Material certificate, inspection report, RoHS/REACH declaration and lot traceability records are available.
To speed up engineering review, please provide a drawing or confirm the key specifications below. If your application has a target pull force, Vanguard can help select a standard size or propose a custom ferrite pot magnet.
