Product portfolio
SmCo magnetic poles — this makes the difference: robustness and precision as the core of our brand.
The portfolio
Nanomag pole rings
Nanomag pole rings combine the flexibility of composite poles with the thermal, magnetic and chemical robustness of samarium-cobalt.
- Ring height at least 3 mm (single track) or 6 mm (dual track) — flexibly selectable, with no restrictions on robustness or product properties
- Extreme lightweight design possible — with no compromise on robustness
- Fully metallic component — resistant to all common oils and greases as well as organic solvents, saltwater, salt solutions and aqueous alkaline solutions
- Inert to radioactive radiation and electromagnetic pulses — demagnetisation is practically impossible
- No restrictions on speed and temperature — not even simultaneously
- Extremely efficient use of magnet material — one fifth of an elastomer-bonded ring and under 2 % of a sintered ring of the same size
Technical data
- Outer diameter
- 20 – 120 mm, smaller on request
- Inner diameter
- 16 – 110 mm, H7
- Wall thickness
- from 2 mm
- Carrier
- Stainless steel
- Magnetic layer
- SmCo (Samarium-Cobalt)
- Ring height, single track
- from 3 mm
- Ring height, dual track
- from 6 mm
- Pole pitch
- 0.5 / 1 / 2 mm
- Runout deviation
- ≤ 25 µm, guaranteed
- Operating temperature
- −273 … +300 °C
- Temperature coefficient Br
- −0.03 %/K
- Temperature coefficient HcJ
- −0.2 %/K
- Speed
- verified to 42,000 rpm (200 °C, ⌀ 57 mm)
- Magnetisation
- radial
- Construction
- fully metallic
We will review dimensions outside these ranges on request. Wall thickness and ring height are engineered per application.
Construction
How a Nanomag pole ring is built
In comparison
SmCo versus the usual alternatives
| Property | Nanomag SmCo | sintered NdFeB | ferrite | elastomer-bonded |
|---|---|---|---|---|
| Operating temperature | −273 … +300 °C | ≈ −138 … +180 °C | ≈ −40 … +250 °C | ≈ −40 … +150 °C |
| Runout deviation | ≤ 25 µm, guaranteed | not specified | not specified | not specified |
| Aggressive media | resistant, > 94 % field strength | requires corrosion protection | generally resistant | binder is attacked |
| Speed and temperature simultaneously | no restriction | — | — | — |
| Wall thickness and mass | from 2 mm wall — lightweight | comparatively thick | medium | comparatively thick |
| Demagnetisation by radiation or EMP | practically impossible | — | — | — |
| Magnet material per ring | 0.1 mm layer on a steel carrier | the full wall thickness | the full wall thickness | ≈ 0.5 mm layer on a carrier |
The figures for sintered NdFeB, ferrite and elastomer-bonded magnets describe typical properties of the respective material class and make no statement about individual products or manufacturers. The values for Nanomag SmCo pole rings refer to our verified specifications.
Frequently asked questions
Questions about our products?
Here you will find answers to the most frequently asked questions about our product range.
What products do we offer?
Our portfolio comprises purely metallic magnetic poles based on samarium-cobalt (SmCo) with a radial magnetic layer. Both wall thickness and ring height can be flexibly adapted to the respective application without losing the described properties.
How can I request product information?
Our sales team is available by email at wpe@nanomag.at or by phone at +43 650 66 27 617. We are also happy to advise you in person and send you detailed product documentation.
We value competent advice and individual solutions for your business.
How dependent are we on foreign supply chains — the question of rare earths?
For us, resource independence was not a reaction to supply bottlenecks but a requirement placed on process and product development. EUROPE first! Development and manufacturing are in Austria, we source the magnetic material through European suppliers, and we are working to further reduce the remaining dependence on individual markets outside Europe.
The most effective lever here is quantity. The high energy density of SmCo allows a layer just 0.1 mm thick: a ring of ⌀ 57 mm and 6 mm height therefore contains around 0.1 cm³ of magnet material — one fifth of an elastomer-bonded ring and under 2 % of a sintered ring of the same size. Needing a fiftieth of the material per part means correspondingly less exposure to price spikes and export restrictions on rare earths.
Are single-track and dual-track versions available?
Yes. Single-track rings are possible from a ring height of 3 mm, dual-track from 6 mm. Ring height is freely selectable within those limits — with no restrictions on robustness or product properties.
What information do you need for a quotation?
Helpful details are: outer and inner diameter, ring height, desired pole count or pole pitch, single or dual track, operating temperature range, rotational speed, the media the ring will be exposed to, and the intended quantity. If some of these are not yet defined, we will work them out with you.
Is runout documented?
Yes. Runout deviation, field strength and pole pitch are verified and documented. The scope and format of that documentation is agreed to match your quality requirements.
Want to know more?
Reimagine magnetic sensing. We are pushing the limits you have known.
Do you have an application at the edge of what is feasible? That is exactly where we like to work. Send us your requirements — we will tell you honestly whether we can meet them.
Let's talk about your application.
Send us your requirements — diameter, pole count, temperature range, media exposure. You will get a substantive technical answer, not a brochure.