Product overview
The NdFeB ring magnets (N35–N52) here are sintered, precision-machined rings intended for installations where a compact magnetic source and a central bore simplify assembly. Engineers use this form to mount directly on shafts or locate on fixtures without additional adapters - a straightforward way to save part count in rotors, stators, encoders and couplings.
Technical specifications
- Material: sintered Nd–Fe–B, grades N35–N52.
- Magnetization: axial (standard) or radial; multi-pole patterns on request.
- Dimensions: custom OD / ID / thickness; typical tolerance ±0.05 mm (tighter on request).
- Finish: Ni-Cu-Ni plating standard; epoxy or zinc available for corrosive environments.
- Tests: batch magnetic flux (Br), coercivity and dimensional inspection supplied with shipment.
Key features
- Space efficiency. Hollow center allows direct shaft mounting and reduces machining on housings.
- High energy density. NdFeB material keeps the magnet small while delivering usable torque and field strength.
- Design flexibility. Multiple magnetization schemes let the same ring geometry serve rotors, stators or sensor rings.
- Field stability. With appropriate grade selection and coating, rings perform reliably under vibration and normal thermal cycling.
Applications
- Rotor/stator rings for compact permanent-magnet motors.
- Concentric magnetic couplings and clutches used in pumps or gearboxes.
- Encoder and rotary sensor rings where concentric field symmetry matters.
- Actuators and compact drive modules in automation equipment.
Procurement & customization
We handle prototype samples and scale to bulk orders for OEM programs. Typical workflow: you supply OD/ID/thickness and preferred grade → we deliver samples for fit and flux testing → approve tooling and volumes → production with batch traceability. We also handle matched-set production for multi-pole rotors and can provide protective packaging and labeled trays for assembly lines. If you need custom ring magnets or are planning an OEM rollout, state your expected annual volume so we can propose optimal tooling and pricing.
FAQ
Q: Can you make higher-temperature versions?
A: Yes - specify a high-temp grade and coating; we'll quote options.
Q: Do coatings affect tolerances?
A: Coatings add microns; we account for that in tolerance control and report final dimensions.
Q: Are samples available before committing to volume?
A: Yes - sample batches are standard practice for validation prior to bulk production.
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