Ferrite Magnet
GX Magnet produces sintered ferrite arc magnets to customer drawings for OEM motor magnetic circuits. Geometry, magnetic targets, magnetization and the installed air gap are reviewed before sample approval.
GX manufactures drawing-defined ferrite magnets and motor components for appliance, automotive, pump and industrial motor applications.
Before quotation
A consistent parameter package from procurement and engineering enables GX to evaluate manufacturability, confirm quotation scope, plan tooling and inspection methods, and establish clear sample-approval criteria before production.
Finished Product Display
Compare sintered ceramic ferrite shapes, ferrite ring geometries and injection-molded ferrite options to select the appropriate product route. For a drawing-defined part, submit the material or magnetic target, critical dimensions, magnetization requirements and operating conditions for engineering review.
Why choose us for your project
Our in‑house rotary‑kiln calcination line supports independent formula development. We produce high‑grade ferrite powder 100% for internal use. It enables miniaturized arc magnets down to 2.25 mm wall thickness, batch magnetic fluctuation controlled within ±3%.
Calcination parameters are tuned together with magnet geometry. Optimized powder grain structure supports FB12 high‑grade material. Magnet assembly weight can be reduced to 41%versus traditional 2‑pole solution, without sacrificing magnetic flux.
Tightly‑controlled calcination improves intrinsic Hcj up to 4200 Oe. Stable powder quality guarantees consistent magnetic orientation, critical for thin‑wall mini‑size motor magnetic circuits.
Stable raw‑material performance lowers sintering deformation, dimensional tolerance can reach ±0.05 mm. Annual capacity for thin‑wall arc‑segment magnets hits 6.5 million pcs.
Why choose us for your project
We supply mature arc ferrite segments for automotive window lifting motors, power tools and home appliance motors. With upgraded FB12-grade material, miniaturized design and stable mass production capability, the magnet assembly can achieve smaller volume, lower weight and consistent magnetic performance.
Upgraded FB12-grade ferrite reduces the wall thickness to 2.25 mm for automotive window lifting motor magnets. The total magnet assembly weight can be reduced to 41% compared with the traditional 2-pole solution.
Existing mass-production sizes cover single-piece weight from 21.0 g to 41.0 g. Suitable for soybean-milk machines, power tools and similar small motor applications.
Strict dimensional tolerance and stable magnetic performance support batch supply. Custom arc-segment dimensions, grades and magnetic requirements are available based on customer drawings.
Why choose us for your project
Material grade alone cannot guarantee performance for large‑size heavy ferrite magnets. Our sample‑release workflow validates geometry, weight, magnetic property and anti‑deformation performance before mass production for treadmill projects.
Confirm inner‑outer radii, thickness, axial length, weight tolerance, bonding surfaces and edge acceptance for heavy‑weight large arc segments.
Define magnetization direction, test fixture and air‑gap requirement for high‑power treadmill motors, covering single‑piece weight up to 845 g.
Inspect sintering deformation, dimension deviation, magnetic flux and chipping risk; verify performance under high‑load working conditions.
Deploy released drawing specifications. Stable batch quality for both home‑use and commercial treadmill motor orders, existing SKU weight range 320‑845 g.
Product and supply scope
A ferrite arc magnet is a curved sintered permanent-magnet segment used to form part of a circular magnetic circuit. Arc ferrite magnets are commonly specified around a rotor or inside a motor housing, where segment geometry and the working air gap affect the installed magnetic result.
GX supplies individual ferrite arc magnets according to the approved drawing and magnetic requirement. The customer’s carrier, housing, rotor, adhesive system and final assembly remain separate unless their supply scope is confirmed for that project.
FERRITE ARC SELECTION GUIDE
Use the motor or housing interface to define the radius, thickness, arc coverage and axial length. Then specify the material orientation, magnetization direction, polarity sequence and bonding features required by the drawing.
FERRITE ARC MAGNET RFQ PARAMETERS
The table follows the engineering review sequence for ferrite arc magnets. Reference ranges support initial evaluation; the final grade, inner and outer radius, arc angle, thickness, axial length, magnetic target, bonding interface and acceptance limits are confirmed in the released drawing, approved specification, quotation and control plan.
| Parameter group | Project-specific review basis | Confirmation and Release Evidence |
|---|---|---|
| Material / route | Sintered strontium ferrite; grade selected from the required coercivity and energy target | Approved strontium ferrite grade and magnetic orientation; Br, Hcb, Hcj and (BH)max report at 20°C when specified. |
| Geometry and tolerances | Inner/outer radius, arc angle or chord, thickness, axial length, datums and chamfers | Released drawing defines inner and outer radius, arc angle or chord, thickness, axial length, datums, chamfers and tolerances; verified by the first-article profile report. |
| Magnetic or functional requirement | Material properties plus installed-gap flux or another agreed motor-circuit measure | Approved finished-part limits for installed-gap flux, surface field or another motor-circuit target, with the measurement position, air gap, fixture and temperature defined. |
| Mechanical / assembly interface | Pole orientation, bonding face, mating diameter and installed air gap | Approved bonding face, mating diameter, adhesive system, bond-line thickness and pole orientation; assembly fit or retention testing when specified. |
| Operating environment | Temperature, vibration, moisture, adhesive exposure and opposing field | Agreed limits for temperature, vibration, moisture, adhesive exposure and opposing field; environmental tests include defined duration and pass criteria. |
| Inspection and acceptance | Profile/dimensional inspection plus defined field, flux or functional check | Control plan defines profile and dimensional inspection, magnetic measurement method, fixture, sample size, frequency, acceptance limits and lot-release records. |
| Supply boundary | Arc magnet segment; bonding or rotor assembly only when separately quoted | Quotation and drawing identify the supplied scope—arc segments, bonded magnet set or rotor assembly—and the included magnetization, bonding, inspection, packaging and documentation. |
Process route
The geometry, material requirement and magnetic direction define the process and inspection route.
Drawing, arc dimensions, magnetic target, polarity and assembly conditions are checked together.
The ferrite material route is set against the approved material or magnetic requirement.
The segment is formed with the approved geometry and magnetic-direction requirement.
Sintering is followed by finishing of drawing-defined surfaces and critical dimensions.
Direction and polarity are checked with the dimensional and magnetic sample results.
Approved dimensional, appearance and magnetic criteria are used for production release.
Verification
The control plan links curved geometry and polarity to the customer’s assembly fit and magnetic acceptance requirement.
| Inspection item | Control approach | Why the buyer needs it |
|---|---|---|
| Arc geometry | Inner radius, outer radius, thickness, height and arc or chord dimensions checked against the drawing | Controls fit and circumferential spacing |
| Datums and bonding surfaces | Drawing-defined reference faces and edge condition inspected to agreed criteria | Supports positioning and adhesive-gap consistency |
| Magnetic properties | Agreed material or magnetic parameters checked under specified conditions | Connects the part to the approved magnetic design |
| Polarity / magnetization | Direction and polarity verified against the approved orientation drawing | Prevents incorrect segment installation |
| Appearance | Cracks, chips and edge condition evaluated against the agreed acceptance standard | Reduces handling and assembly disputes |
Application fit
Application fit depends on the segment-to-carrier interface, working air gap, polarity layout and operating environment.
Automotive auxiliary motors require the ferrite arcs to maintain the specified air gap and bonded position under temperature cycling and vibration. Define the stator bore, arc span, thickness, pole orientation, adhesive system and operating temperature. First-article approval checks the arc profile, installed-gap flux and retention after the agreed environmental tests.
For appliance and pump motors exposed to moisture or hot/cold water, define the stator bore, working air gap, arc length, magnetic target and fluid-temperature cycle. Sample approval checks dimensional fit, polarity and gap flux before and after the specified exposure, together with the bonded interface.
Fan and HVAC motors depend on consistent field distribution during extended operation. Specify the segment count, arc coverage, working air gap, pole sequence, operating speed and temperature. Approve matched-set dimensions, pole symmetry and flux distribution to control variation between assembled motors.
Industrial-motor programs may require larger ferrite arcs and increased mechanical retention. Define the stator bore, segment dimensions, working air gap, duty condition, operating temperature and bonding method. Validate the arc profile, installed-gap magnetic output and retention under the agreed thermal and vibration conditions before recurring production.
Documented evidence
GX uses documented quality-system controls and ferrite sample compliance reports as supporting evidence. The product drawing and agreed inspection specification remain the release basis for each arc magnet project.
GX manufactures permanent ferrite components under an IATF 16949-certified quality management system, supporting documented process control, product traceability and recurring-production requirements.
Submitted ferrite magnet samples have passed SGS screening against the applicable EU RoHS restricted-substance requirements, providing third-party material-compliance evidence for customer review.
Submitted ferrite magnet samples have passed SGS REACH SVHC screening within the tested scope, providing documented third-party evidence for material-compliance review and project approval.
Customer and industry presence
Customer logos indicate organizations served by GX; they are not presented as product endorsements.
GX Magnet Booth at Manufacturing World Tokyo 2026. Event or visit photograph documenting the people and setting shown.
Engineering and sourcing FAQ
Eight practical answers covering material-grade selection, arc geometry, dimensional tolerances, magnetic targets, bonding interfaces, operating conditions, sample validation and recurring-production controls.
The main differences are the material route, achievable geometry, magnetic output and assembly method. Compare them in the actual magnetic circuit and operating condition; the product name alone is not enough to select the part.
Start with strontium-ferrite grade and anisotropic orientation. Then check the required magnetic output, geometry, temperature and commercial volume before fixing a grade in the drawing.
Control the dimensions that set fit, air gap or working position. For this product, review inner and outer radii, arc angle, thickness, pole orientation and working air gap; avoid applying a tight general tolerance to non-functional surfaces without a measurement reason.
Specify the magnetization axis or pole pattern, pole count where applicable, and the acceptance method. A field value must also state the measurement location, fixture or air gap so supplier and buyer evaluate the same condition.
Temperature capability depends on material grade, geometry, magnetizing state and the magnetic circuit. Provide working temperature, opposing field, bonding method and motor duty; GX can then review demagnetization risk and whether the proposed material route fits the duty.
Use an agreed method tied to the application: material-property testing, surface field at a defined position, flux, pull force, pole pattern or waveform. The released drawing and acceptance plan should state the instrument, fixture and limits.
Send the drawing or 3D model, material or magnetic target, inner and outer radii, arc angle, thickness, pole orientation and working air gap, working temperature, opposing field, bonding method and motor duty, expected quantity and acceptance method. State whether tooling, inserts, assembly or magnetization is included in the requested supply scope.
Agree the drawing revision, tooling state, critical dimensions and magnetic test method before sample release. Approval should identify the sample record and any deviations; recurring orders then follow the released specification, quotation and control plan.
Project inquiry
Attach the segment and assembly drawings. GX reviews the arc geometry, material or magnetic target, magnetization, application conditions and inspection method before defining the sample route.
