Custom Arc Segment Magnets
Precision-ground sintered NdFeB and ferrite arc segment magnets for PM motors, generators, and actuators. Custom pole pitch, radius, and angular span.
High-Efficiency Arc Magnets for Motion Control
Arc segments are the foundation of high-performance Permanent Magnet (PM) motors. Elite Magnets provides precision arc segments designed for BLDC, PMSM, and servo motors, as well as large-scale wind generators and linear actuators.
Our diamond grinding technology allows for tight tolerances on inner and outer radii, ensuring minimal air gaps and maximum torque efficiency in your motor design.
- Radius Precision: Smooth transition between poles with radius tolerances of ±0.05mm.
- Grades: N35 to N52 and high-temp SH, UH, EH grades for automotive motors.
- Finishes: Ni-Cu-Ni, Epoxy (Black/Grey), and Everlube coatings available.
Technical Specifications
| Parameter | Specification |
|---|---|
| Inner Radius (IR) | Customized per motor design |
| Outer Radius (OR) | Up to 500mm OD |
| Arc Angle | 15° to 180° per segment |
| Length | Up to 200mm (or stacked) |
| Magnetization Direction | Radial / Diametrical / Multi-pole orientation |
| Tolerance | ±0.05mm (on radii and thickness) |
| Material Grades | Sintered NdFeB N35-N52 / Sintered Ferrite Y30-Y35 |
Key Applications
High-density rotors for BLDC and PMSM traction motors.
Large arc segments for multi-megawatt offshore turbine rotors.
Curved segments for specialized circular linear motor tracks.
High-precision arcs for industrial robotics and CNC systems.
Low-noise arc magnets for medical beds and diagnostic tools.
High-flux arc segments for premium audio transducer drivers.
Why Elite Magnets?
In-house Diamond Grinding
Proprietary grinding techniques ensure perfect radii for minimal motor air gaps.
CMM Verification
Every arc is checked against CAD models on high-precision coordinate measuring machines.
Wide Material Stock
We stock raw blocks of all NdFeB grades for fast lead times on custom arc segments.
Frequently Asked Questions
Order Custom Arc Segments
Submit your arc magnet drawing for a fast manufacturing quote.