Product Details
Alnico is the magnet alloy engineers specify when holding force has to survive heat, vibration and decades of use. PML Alnico Pot Magnets concentrate that alloy's stable, durable magnetism into a machined steel pot — a holding magnet you install once and trust for years, in conditions that would degrade lesser materials.
With strong holding power, robust construction and simple threaded installation, they mount in minutes and serve across an unusually wide range of industrial and technical tasks.
Where Alnico Pot Magnets Are Used
- Manufacturing and assembly
- Magnetic fixtures and clamping
- Magnetic door catches
- High-temperature applications, thanks to Alnico's temperature stability
- Retrieving and lifting applications
- Magnetic sensors and switches
- Scientific and research applications
- Automotive and motor applications
- Holding fixtures for tools and equipment
Every Magnet Pull-Tested
We don't estimate holding force — we measure it. A specialised pull-force tester applies a gradually increasing force perpendicular to the magnet face until release, verifying that each design holds what its datasheet says it holds.
Choose Your Type
1. Alnico Deep Pot Magnets
The deep pot geometry maximises holding force for a given diameter — the workhorse of the range.
| Alnico Deep Pot Magnets | ||||||
|---|---|---|---|---|---|---|
| Sr.no. | Model No. | A(mm) | B(mm) | C(Tap) | Holding Force | |
| Kg | N | |||||
| 1 | 101 | 17 | 16 | M6 | 2.7 | 26 |
| 2 | 102 | 21 | 19 | M6 | 4.5 | 44 |
| 3 | 103 | 27 | 25.5 | M6 | 8.2 | 80 |
| 4 | 104 | 35 | 30 | M6 | 15 | 147 |
| 5 | 105 | 65 | 43 | M12 | 40 | 392 |
| 6 | 108 | 50 | 40 | M8 | 28 | 275 |
2. Alnico Shallow Pot Magnets
Where mounting depth is limited, the shallow pot delivers Alnico performance in a low-profile format.
| Alnico Shallow Pot Magnets | ||||||
|---|---|---|---|---|---|---|
| Sr.no. | Model No. | A(mm) | B(mm) | C(mm) | Holding Force | |
| Kg | N | |||||
| 1 | 121 | 19 | 8 | 3.5 | 3.5 | 34 |
| 2 | 122 | 28.5 | 9.5 | 7.3 | 10 | 98 |
| 3 | 123 | 37.6 | 11.1 | 4.7 | 12 | 118 |
3. Alnico Pot Magnets with Interrupter
An interrupter lets you mechanically break the magnetic circuit — hold and release on demand, with no power involved.
| Alnico Deep Pot Magnets | |||||||
|---|---|---|---|---|---|---|---|
| Sr.no. | Model No. | A(mm) | B(mm) | C(mm) | D(mm) | Holding Force | |
| Kg | N | ||||||
| 1 | 140/1 | 44 | 44 | 5/16 Bsw | 33 | 20 | 196 |
| 2 | 141/1 | 55 | 50 | 5/16 Bsw | 38 | 40 | 392 |
| 3 | 142/1 | 70 | 62 | 5/16 Bsw | 50 | 80 | 784 |
| 4 | 143/1 | 100 | 75 | M-12 | 70 | 165 | 1618 |
Reading the Ratings Honestly
- Holding forces are determined at room temperature on a polished steel plate (Q235B).
- A maximum deviation of −10% from the specified value is possible in exceptional cases; in general the value is exceeded.
- Real-world performance depends on the application — installation situation, temperature, counter-anchor and more.
- Treat the indicated values as orientation, and ask our engineers to verify your specific case.
Key Features
- Strong Holding Power
The pot construction concentrates Alnico's field onto the working face.
- Temperature Stability
Alnico keeps its magnetism at temperatures that would degrade other magnet materials.
- Robust, Versatile Build
Machined construction in a wide range of sizes and configurations, with easy threaded installation.
- Quality Assurance
Pull-force tested designs from a manufacturer with 65+ years in magnetics.
Frequently Asked Questions
Why choose Alnico over NdFeB or ferrite?
Alnico excels where temperature and long-term stability matter — it holds its magnetism in heat that would weaken NdFeB, and it outlasts ferrite in demanding duty. For maximum force in a small size at moderate temperatures, see our NdFeB pot magnets; for economy, our ferrite pot magnets.
Deep, shallow, or interrupter — which type do I need?
Deep pots give the most force per diameter; shallow pots fit tight spaces; interrupter models add mechanical ON/OFF release. The specification tables above list dimensions and holding forces for every model.
Are the holding force ratings reliable?
They are measured by pull-force testing on polished steel at room temperature, and in general are exceeded in practice. Surface finish, air gaps and temperature in your application will affect the real figure — our engineers will help you verify.
Why Buy From PML
- 65+ years of magnetic expertise — Permanent Magnets Ltd has designed and manufactured magnetic products for 65+ years, and our consumer range is built to the same engineering standards we supply to global industrial leaders.
- Made and tested in-house — magnets, assemblies and finished products are manufactured and quality-checked at our own facilities, so every unit performs to its stated specification.
- Honest specifications — the ratings you read on this page are the ratings you get. If your application needs a different size or strength, our engineers will tell you exactly what works — and what won't.
- Support from real engineers — from product selection to after-sales, your questions are answered by the team that builds the product.
Need help choosing, or a custom specification? Enquire now and our engineering team will guide you to the right solution.