OSENC manufactures custom N55 neodymium magnets for compact OEM magnetic circuits where higher magnetic energy density helps achieve the required output within limited magnet volume. We supply disc, block, ring and cylinder geometries with drawing-controlled dimensions, coating, magnetization and project-defined magnetic acceptance requirements.
Send your drawing, working gap, operating temperature and target magnetic output. We review whether N55 creates a real design advantage and lock the finished-part specification before production.
N55 is positioned for small and compact high-field magnets. Its higher material-level Br / BHmax range can create useful design margin when magnet volume is constrained. It is not automatically the better choice when N52 already meets the finished magnetic target with sufficient margin.
OSENC compares Surface Gauss, Total Flux or Pull Force only under matched geometry and defined test conditions. Magnet size, coating, magnetization, air gap, steel condition and fixture setup all influence finished performance.
Surface Gauss alone does not prove a magnet is N55. For controlled N55 projects, material acceptance is based on the properties that define the grade, with the material certificate and B-H / hysteresis data used when material-level evidence is specified.
| Material Property | OSENC N55 Acceptance Baseline | Dlaczego ma to znaczenie |
|---|---|---|
| Remanence, Br | ≥14.5 kG / 1.45 T | Defines the residual magnetic flux density available from the magnetized material. |
| Normal coercivity, Hcb | ≥12.2 kOe | Shows resistance to reduction of magnetic induction under a reverse field. |
| Intrinsic coercivity, Hcj | ≥13.0 kOe | Important for demagnetization margin and temperature-sensitive designs. |
| Maximum energy product, (BH)max | ≥52 MGOe | Confirms the high energy density used to justify N55 in compact designs. |
Know whether the material meets the agreed N55 properties instead of judging grade from a surface-field reading alone.
Coated finished dimensions are controlled against the approved part specification because the finished part determines assembly fit.
Total Flux, fixed-position Surface Gauss or functional Pull Force can be linked to defined fixtures and test conditions when specified.
Material, geometry, coating, magnetization and agreed acceptance criteria are locked at the sample stage before production.
N55 is particularly useful in miniature disc and cylinder designs where magnetic volume is limited. OSENC also manufactures block and ring N55 magnets to drawing when the higher energy density creates a useful design benefit.
| Reference Type | N55 Size References | How OSENC Uses This Range |
|---|---|---|
| Disc / Cylinder | D3.175×1.524, D3.175×3.175, D4.75×1.524, D6.35×3.175 mm | Compact sensor, switch, encoder and precision mechanism starting points. |
| Disc / Cylinder | D6.35×6.35, D7.925×6.35, D9.525×3.175 mm | Compact designs where higher energy density can reduce magnetic package size. |
| Custom Block / Ring | Made to drawing | Final feasibility is locked against finished tolerance, magnetization direction, coating and magnetic target. |
These dimensions are practical RFQ references rather than fixed stock specifications. The production part follows the approved drawing.
OSENC uses ±0.10 mm as the standard finished-tolerance reference and ±0.05 mm as the precision finished-tolerance reference for N55 projects. The controlled dimension is the coated finished part.
Miniature geometries are handled against the drawing and process capability instead of applying one extreme tolerance claim to every shape.
| Kształt | Magnetization Directions | Engineering Control |
|---|---|---|
| Dysk | Axial / Diametrical | Direction is locked to the sensor, holding or magnetic-circuit geometry. |
| Prostopadłościan | Through Thickness / Length / Width | The magnetization axis is defined against the assembly and working gap. |
| Pierścień | Axial / Diametrical / Radial / Multipole | Radial and multipole rings use dedicated magnetizing fixtures. |
| Cylinder | Axial / Diametrical | Direction is defined on the drawing and verified after magnetization. |
OSENC currently specifies Ni, Ni-Cu-Ni, Zn and Au coating options for N55 projects. Selection is tied to corrosion exposure, dimensional fit, appearance and contact requirements.
OSENC uses 80°C maximum as a standard N55 engineering reference only in suitable magnetic geometries and working conditions. The L/D ≥0.7 reference applies only where that geometric ratio is meaningful.
Rings, blocks, thin sections and low-permeance designs require separate demagnetization review before the temperature requirement is approved.
After material grade and finished geometry are accepted, OSENC verifies the finished magnet against the magnetic characteristics specified for the project. Different measurements answer different engineering questions, so Surface Gauss is not treated as a substitute for material-grade verification or functional Pull Force.
Used for material-level verification of Br, Hcb, Hcj and (BH)max when specified.
Finished magnets can be checked with defined measuring equipment, fixture position and test distance.
When required, steel condition, air gap and pull direction are fixed before results are compared.
*Functional pull-force testing is added when the project requires it. The test setup must be controlled before pull-force values are used as an acceptance criterion.
Required records are defined in the approved inspection plan before production. Depending on the project, documentation can include:
Material Certificate and B-H / hysteresis data when material-level grade evidence is specified.
Finished-dimension inspection and coating acceptance records against the approved drawing and finish requirement.
Magnetization verification, Total Flux, fixed-position Surface Gauss and Pull Force records when specified.
Compact N55 magnets help when working gap and trigger threshold require more magnetic margin in a limited package.
Small disc, cylinder and ring designs can support high field density where alignment and sensor spacing are tightly controlled.
N55 is useful where reducing magnetic package size matters more than simply minimizing material cost per magnet.
OSENC quotes the finished component against the drawing and required QC. Price is driven by N55 material volume, geometry, precision grinding, finished tolerance, coating, magnetization fixture, magnetic inspection, certificate requirements and order quantity.
The N55 baseline used on this page is Br ≥14.5 kG / 1.45 T, Hcb ≥12.2 kOe, Hcj ≥13.0 kOe and (BH)max ≥52 MGOe. Material Certificate and B-H / hysteresis data are used when the project requires material-level evidence.
N55 has a higher material-level Br / BHmax range than N52, but finished Surface Gauss, Total Flux and Pull Force are compared only under matched geometry and controlled test conditions.
OSENC uses 80°C maximum as the engineering reference on this page only where the magnetic geometry and working point are suitable. Thin or low-permeance designs require separate demagnetization review.
OSENC manufactures custom N55 projects in disc, block, ring and cylinder forms. Compact high-field parts are the main positioning because the grade is most useful when magnetic volume is limited.
Disc and cylinder magnets can use axial or diametrical magnetization. Blocks can be magnetized through thickness, length or width. Rings can use axial, diametrical, radial or multipole magnetization.
Finished verification can include dimensions, coating, magnetization direction, Total Flux, fixed-position Surface Gauss and functional Pull Force when specified. Material-grade verification remains separate from finished-part magnetic testing.
Send OSENC your drawing, magnetic target and operating conditions. We review material grade, geometry, coating, finished tolerance, magnetization, temperature, working gap and required magnetic QC as one controlled component before sampling.
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