Arc and segment magnets for curved magnetic circuits.

A general curved product family covering arc segments, tiles, matched sets, and drawing-defined variants across rare-earth material, coating, magnetization, and assembly options.

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Curved neodymium arc and segment magnets for circular magnetic circuits

Product familyArc segments, tiles, curved pieces, and matched magnet sets

Common materialsSintered NdFeB, sintered SmCo, or bonded rare-earth material where suitable

Common custom optionsRadii, angle, length, coating, pole direction, matched sets, marking, and packaging

Typical usesBLDC and PMSM motors, pumps, actuators, generators, and curved assemblies

Product

The curved segment is the product; motor, material, and coating are specifications.

Marketplace catalogs often repeat the same arc shape under motor, grade, coating, or application labels. This page keeps those variants under one curved product family. The released drawing then controls radii, angle, length, material, pole direction, coating state, matched-set relationship, and acceptance.

Review arc geometry, coating, matched-set, assembly, and inspection capabilities

Curved geometry matched to circular magnetic circuits

Matched-set and orientation-control options

Material routes for output, heat, and environment

Common sourcing situations

The supplied part is an individual curved arc, tile, or segment.
Inner and outer radius, arc angle, and axial length define the primary geometry.
Segment count, polarity sequence, coating state, and orientation can be controlled as set attributes.
The application uses a curved magnetic circuit in a motor, pump, actuator, generator, or custom assembly.

Details to confirm before production

Radius, chord, angle, length, and coating build all influence assembly fit and air gap.
Brittle edges, adhesive gaps, retention, and high-speed handling need explicit requirements.
Matched sets need polarity, segment identification, sequence, and packaging control.
Magnetic output must be approved in the real rotor, stator, or curved assembly circuit.

Specification

Define the curved interface and the matched-set condition together.

A useful arc specification combines inner and outer radius, arc angle or chord, axial length, edge condition, material, coating, pole direction, segment count, assembly gap, retention, packaging, and inspection. Motor and pump uses remain applications of the arc product rather than separate overlapping products.

Common information used to define an arc or segment magnet.

Geometry	Inner radius, outer radius, arc angle or chord, axial length, edge condition, segment count, and datums.
Material route	NdFeB, SmCo, or bonded rare-earth route selected by output, temperature, environment, geometry, and cost.
Magnetization	Through thickness, radial, parallel, custom direction, polarity sequence, orientation mark, and delivery state.
Surface and assembly	Coating, adhesive compatibility, air gap, rotor or stator location, sleeve, retention, cleanliness, and handling.
Inspection and packaging	Radius, chord, angle, length, coating state, polarity, matched-set control, identification, and oriented packing.

Technical Data

Generic arc and segment product reference.

The fields below reflect common product-listing options. They organize a sourcing conversation but do not promise stock sizes, grades, tolerances, output, matched-set performance, or delivery terms.

Specification field	Common catalog options	Confirm for production
Dimensions	Inner radius × outer radius × arc angle or chord × axial length	Finished dimensions, tolerances, datums, edge condition, and coated state
Material	NdFeB, SmCo, or bonded rare-earth route	Grade, operating temperature, load line, geometry, and environment
Magnetization	Through thickness, radial, parallel, multipole, or drawing-defined direction	Polarity, sequence, physical reference, delivery state, and test position
Surface	Nickel, epoxy, zinc, passivation, or application-reviewed protection	Exposure, coating build, adhesive compatibility, edge coverage, and assembly fit
Set control	Individual segments, matched sets, identified positions, or orientation-packed groups	Segment count, polarity sequence, gaps, marking, retention, and packaging
Supply condition	Loose arcs, matched sets, bonded subassemblies, or assembly-ready components	Quantity, cleanliness, handling, acceptance documents, and change control

This is generic catalog information. Final capability and acceptance are confirmed after drawing, material, magnetic, coating, matched-set, and application review.

Common catalog variants

Common curved variants remain part of one arc and segment family.

CAD review for arc radius, angle, and assembly interfaces

Arc segments

Curved pieces defined by inner and outer radius, arc angle, and axial length.

Surface protection process for rare-earth arc magnets

Tiles and wider curved parts

Broader curved geometries used where the magnetic circuit and mechanical interface require more surface area.

Precision dimensional inspection for curved magnetic segments

Matched magnet sets

Identified and orientation-controlled segment groups prepared around polarity, order, gaps, and assembly handling.

Application examples

Common applications for curved magnetic components.

Motor production context for curved magnet segments

BLDC and PMSM motors

Curved rotor or stator segments reviewed around torque, air gap, temperature, pole direction, coating, and retention.

High-speed rotor application using curved magnetic segments

High-speed rotating systems

Matched segments used with defined retention, sleeve, balance, handling, and validation responsibilities.

Motor and actuator context for arc and segment magnets

Pumps, actuators, and generators

Curved magnetic circuits specified around duty cycle, exposure, geometry, assembly, and repeat supply.

Engineering guides

Use the same engineering checks across every product family.

Material, coating, magnetization, tolerances, and inspection remain product attributes. Confirm them against the drawing and application instead of creating another duplicate product category.