Custom Made Neodymium

Made-to-Order NdFeB Magnets and Assemblies

Although the range of magnets and magnetic assemblies we stock for next working day delivery is large, we appreciate that there will be a requirement for magnets that we do not currently stock. This could be as simple as having a magnet of the same size but a different grade or as complex as a bespoke magnetic assembly.

If you cannot find the right shape or grade of magnet or magnetic assembly, please contact us. If you need a custom made magnet, we can help you. All we ask is that you send us a drawing or sketch of your requirements for a free and without obligation quotation.

We manufacture the complete range of 47 magnetic grades for NdFeB. We also offer 25 types of coating/surface finish. Standard tolerances are +/-0.1mm with +/-0.05mm also being readily available. Tolerances down to +/-0.005mm are available as part or our Precision Magnetics range.

If you are not sure what you need then please feel free to call us on +44 (0)114 276 2264 and ask for a member of our technical sales team or alternatively send an e-mail to sales@e-magnetsuk.com

A summary of the magnet grade specifications and coatings is given below:-

Neodymium Iron Boron / NdFeB magnetic properties (minimum values):-

+80 deg C maximum recommended operating temperature (Nxx range)
N27:- Br=1.13T, Hc=796kA/m, Hci=955kA/m, (BH)max=119kJ/m^3
N30:- Br=1.17T, Hc=796kA/m, Hci=955kA/m, (BH)max=223kJ/m^3
N33:- Br=1.22T, Hc=836kA/m, Hci=955kA/m, (BH)max=247kJ/m^3
N35:- Br=1.25T, Hc=868kA/m, Hci=955kA/m, (BH)max=263kJ/m^3
N38:- Br=1.28T, Hc=899kA/m, Hci=955kA/m, (BH)max=287kJ/m^3
N40:- Br=1.32T, Hc=907kA/m, Hci=955kA/m, (BH)max=302kJ/m^3
N42:- Br=1.38T, Hc=915kA/m, Hci=955kA/m, (BH)max=318kJ/m^3
N45:- Br=1.4T, Hc=923kA/m, Hci=955kA/m, (BH)max=342kJ/m^3
N48:- Br=1.43T, Hc=923kA/m, Hci=955kA/m, (BH)max=366kJ/m^3
N50:- Br=1.08T, Hc=796kA/m, Hci=876kA/m, (BH)max=382kJ/m^3
N52:- Br=1.13T, Hc=796kA/m, Hci=876kA/m, (BH)max=398kJ/m^3
(please note N50 and N52 are rated to +60 deg C)

+100 deg C maximum recommended operating temperature (NxxM range)
N30M:- Br=1.17T, Hc=796kA/m, Hci=1115kA/m, (BH)max=223kJ/m^3
N33M:- Br=1.22T, Hc=836kA/m, Hci=1115kA/m, (BH)max=247kJ/m^3
N35M:- Br=1.25T, Hc=868kA/m, Hci=1115kA/m, (BH)max=263kJ/m^3
N38M:- Br=1.28T, Hc=899kA/m, Hci=1115kA/m, (BH)max=286kJ/m^3
N40M:- Br=1.32T, Hc=923kA/m, Hci=1115kA/m, (BH)max=302kJ/m^3
N42M:- Br=1.38T, Hc=955kA/m, Hci=1115kA/m, (BH)max=318kJ/m^3
N45M:- Br=1.4T, Hc=995kA/m, Hci=1115kA/m, (BH)max=342kJ/m^3
N48M:- Br=1.08T, Hc=1027kA/m, Hci=1115kA/m, (BH)max=366kJ/m^3
N50M:- Br=1.13T, Hc=1033kA/m, Hci=1115kA/m, (BH)max=382kJ/m^3

+120 deg C maximum recommended operating temperature (NxxH range)
N30H:- Br=1.17T, Hc=796kA/m, Hci=1355kA/m, (BH)max=223kJ/m^3
N33H:- Br=1.22T, Hc=836kA/m, Hci=1355kA/m, (BH)max=247kJ/m^3
N35H:- Br=1.25T, Hc=868kA/m, Hci=1355kA/m, (BH)max=263kJ/m^3
N38H:- Br=1.28T, Hc=899kA/m, Hci=1355kA/m, (BH)max=286kJ/m^3
N40H:- Br=1.32T, Hc=923kA/m, Hci=1355kA/m, (BH)max=302kJ/m^3
N42H:- Br=1.37T, Hc=955kA/m, Hci=1355kA/m, (BH)max=318kJ/m^3
N45H:- Br=1.08T, Hc=955kA/m, Hci=1355kA/m, (BH)max=342kJ/m^3
N48H:- Br=1.13T, Hc=995kA/m, Hci=1355kA/m, (BH)max=366kJ/m^3

+150 deg C maximum recommended operating temperature (NxxSH range)
N30SH:- Br=1.17T, Hc=804kA/m, Hci=1590kA/m, (BH)max=223kJ/m^3
N33SH:- Br=1.22T, Hc=844kA/m, Hci=1590kA/m, (BH)max=247kJ/m^3
N35SH:- Br=1.25T, Hc=876kA/m, Hci=1590kA/m, (BH)max=263kJ/m^3
N38SH:- Br=1.28T, Hc=907kA/m, Hci=1590kA/m, (BH)max=286kJ/m^3
N40SH:- Br=1.32T, Hc=939kA/m, Hci=1590kA/m, (BH)max=302kJ/m^3
N42SH:- Br=1.02T, Hc=987kA/m, Hci=1590kA/m, (BH)max=318kJ/m^3
N45SH:- Br=1.08T, Hc=1003kA/m, Hci=1590kA/m, (BH)max=342kJ/m^3

+180 deg C maximum recommended operating temperature (NxxUH range)
N28UH:- Br=1.13T, Hc=764kA/m, Hci=1990kA/m, (BH)max=207kJ/m^3
N30UH:- Br=1.18T, Hc=812kA/m, Hci=1990kA/m, (BH)max=223kJ/m^3
N33UH:- Br=1.22T, Hc=852kA/m, Hci=1990kA/m, (BH)max=247kJ/m^3
N35UH:- Br=1.25T, Hc=860kA/m, Hci=1990kA/m, (BH)max=263kJ/m^3
N38UH:- Br=1.04T, Hc=899kA/m, Hci=1990kA/m, (BH)max=287kJ/m^3
N40UH:- Br=1.08T, Hc=899kA/m, Hci=1990kA/m, (BH)max=302kJ/m^3

+200 deg C maximum recommended operating temperature (NxxUH range) N28EH:- Br=1.14T, Hc=780kA/m, Hci=2385kA/m, (BH)max=207kJ/m^3
N30EH:- Br=1.17T, Hc=812kA/m, Hci=2385kA/m, (BH)max=223kJ/m^3
N33EH:- Br=1.22T, Hc=836kA/m, Hci=2385kA/m, (BH)max=247kJ/m^3
N35EH:- Br=1.13T, Hc=876kA/m, Hci=2385kA/m, (BH)max=263kJ/m^3
N38EH:- Br=1.22T, Hc=899kA/m, Hci=2385kA/m, (BH)max=287kJ/m^3

+220/230 deg C maximum recommended operating temperature (NxxVH /AH range)
N33VH / AH:- Br=1.13T, Hc=836kA/m, Hci=2706kA/m, (BH)max=239kJ/m^3

The current range of coatings available for NdFeB is as follows:-

Nickel-Copper-Nickel (Ni-Cu-Ni) [standard];
Nickel (Ni);
Epoxy;
Zinc (Zn);
Gold (Au);
Silver (Ag);
Tin (Sn);
Titanium (Ti);
Titanium Nitride (TiN);
Parylene C;
Everlube;
Chrome;
PTFE (also known as "Teflon®"; white, black, grey, silvery);
Ni-Cu-Ni plus Epoxy;
Ni-Cu-Ni plus Rubber;
Zn plus Rubber;
Ni-Cu-Ni plus Parylene C;
Ni-Cu-Ni plus PTFE;
Tin (Sn) plus Parylene C;
Zinc Chromate;
Phosphate Passivation; and
Uncoated (bare – recommend vacuum packing as well).

Other coatings may be possible (e.g. we are currently experimenting with Aluminium coating at a R&D level). If you need a different coating, we can look into it.