Product Overview
Arc Ferrite Magnets
Arc (tile) ferrite magnets are essential permanent magnet components widely adopted in low-to-medium power surface permanent magnet motors, household appliances, industrial pumps, fans and general machinery.
Manufactured from high-purity ferrite raw materials via dry/wet pressing, high-temperature sintering and precision finishing, arc ferrite magnets feature stable magnetic properties, excellent corrosion resistance, weather durability and cost-effective mass production capability. Compared with rare-earth magnets, they deliver outstanding cost performance and reliable service life under conventional operating temperatures.
Ningbo Vanguard Technologies provides a complete range of arc ferrite magnets in multiple standard grades and customized sizes. Strict in-process control ensures tight dimensional tolerance and consistent magnetic output for seamless rotor installation and motor assembly. Every piece is inspected through full magnetic performance testing and dimensional checking to guarantee long-term operational stability in various working conditions.
We offer both standard catalogue dimensions and fully customized arc profiles, special radii, thicknesses and arc angles. Fast sample delivery within 10–15 days and stable mass production lead times are available. Our products can be supplied as bare magnets or integrated rotor components, meeting diverse OEM and ODM demands for industrial and commercial motor applications.
Key Applications
AC fan motors for household ceiling fans, table fans, and exhaust fans, adopting arc ferrite magnets to provide stable rotational power and ensure low energy consumption during long-term daily use, which is one of the most common application scenarios for arc ferrite magnets.
Domestic and light industrial small water pump motors (e.g., garden water pumps, small circulating pumps for family use), using corrosion-resistant arc ferrite magnets that can well adapt to long-term humid working environments without additional anti-rust treatment.
Motors for children’s remote-controlled cars, toy drones, and electric dolls, with small-sized arc ferrite magnets that can provide appropriate torque required by toy operation at a low production cost, meeting the mass production needs of the toy industry.
Air Conditioner fan Motors
Indoor unit fan motors for household air conditioners, which require arc ferrite magnets to ensure quiet operation and long-term stable service life, matching the low-noise and durable use needs of household air conditioning equipment.
Light Industrial Blower Motors
Small blower motors for commercial refrigerators, vending machines, and small refrigeration equipment, using arc ferrite magnets to meet the basic power needs of equipment operation while effectively controlling the overall manufacturing costs of the equipment.
Auxiliary generator fans for small gasoline generators used in families and small workshops, adopting arc ferrite magnets to ensure reliable air cooling effect for the generator, thus guaranteeing the stable operation of the generator during use.
Grade & Magnetic Properties
Standard grades for arc ferrite magnets. All values at 20 °C. Values are typical; exact grade selection is confirmed per application, motor structure, working temperature, and required flux output.
|
Standard |
Grade |
Remanence |
Coercivity |
Intrinsic Coercivity |
Max. Energy Product |
|
Br |
Hcb |
Hcj |
(BH)max |
|
mT |
kG |
kA/m |
kOe |
kA/m |
kOe |
kJ/m3 |
MGOe |
|
Chinese Standard |
Y8T |
200-235 |
2.0-2.35 |
125-160 |
1.57-2.01 |
210-280 |
2.64-3.52 |
6.5-9.5 |
0.8-1.2 |
|
Y10T |
200-235 |
2.0-2.35 |
128-160 |
1.61-2.01 |
210-280 |
2.64-3.52 |
6.4-9.6 |
0.8-1.2 |
|
Y20 |
320-380 |
3.2-3.8 |
135-190 |
1.70-2.39 |
140-195 |
1.76-2.45 |
18.0-22.0 |
2.3-2.8 |
|
Y22H |
310-360 |
3.1-3.6 |
220-250 |
2.76-3.14 |
280-320 |
3.52-4.02 |
20.0-24.0 |
2.5-3.0 |
|
Y23 |
320-370 |
3.2-3.7 |
170-190 |
2.14-2.39 |
190-230 |
2.39-2.89 |
20.0-25.5 |
2.5-3.2 |
|
Y25 |
360-400 |
3.6-4.0 |
135-170 |
1.70-2.14 |
140-200 |
1.76-2.51 |
22.5-28.0 |
2.8-3.5 |
|
Y26H |
360-390 |
3.6-3.9 |
220-250 |
2.76-3.14 |
225-255 |
2.83-3.20 |
23.0-28.0 |
2.9-3.5 |
|
Y26H-1 |
360-390 |
3.6-3.9 |
200-250 |
2.51-3.14 |
225-255 |
2.83-3.20 |
23.0-28.0 |
2.9-3.5 |
|
Y26H-2 |
360-380 |
3.6-3.8 |
263-288 |
3.30-3.62 |
318-350 |
4.00-4.40 |
24.0-28.0 |
3.0-3.5 |
|
Y27H |
370-400 |
3.7-4.0 |
205-250 |
2.58-3.14 |
210-255 |
2.64-3.20 |
25.0-29.0 |
3.1-3.6 |
|
Y28 |
370-400 |
3.7-4.0 |
175-210 |
2.20-2.64 |
180-220 |
2.26-2.76 |
26.0-30.0 |
3.3-3.8 |
|
Y28H-1 |
380-400 |
3.8-4.0 |
240-260 |
3.02-3.27 |
250-280 |
3.14-3.52 |
27.0-30.0 |
3.4-3.8 |
|
Y28H-2 |
360-380 |
3.3-3.8 |
271-295 |
3.41-3.71 |
382-405 |
4.80-5.09 |
26.0-30.0 |
3.3-3.8 |
|
Y30 |
370-400 |
3.7-4.0 |
175-210 |
2.20-2.64 |
180-220 |
2.26-2.76 |
26.0-30.0 |
3.3-3.8 |
|
Y30BH |
380-390 |
3.8-3.9 |
223-235 |
2.80-2.95 |
231-245 |
2.90-3.08 |
27.0-30.0 |
3.4-3.8 |
|
Y30H-1 |
380-400 |
3.8-4.0 |
230-275 |
2.89-3.46 |
235-290 |
2.95-3.64 |
27.0-32.0 |
3.4-4.0 |
|
Y30H-2 |
395-415 |
3.95-4.15 |
275-300 |
3.46-3.77 |
310-335 |
3.90-4.21 |
27.0-32.5 |
3.4-4.1 |
|
Y32 |
400-420 |
4.0-4.2 |
160-190 |
2.01-2.39 |
165-195 |
2.07-2.45 |
30.0-33.5 |
3.8-4.2 |
|
Y32H-1 |
400-420 |
4.0-4.2 |
190-230 |
2.39-2.89 |
230-250 |
2.89-3.14 |
31.5-35.0 |
4.0-4.4 |
|
Y32H-2 |
400-440 |
4.0-4.4 |
224-240 |
2.81-3.02 |
230-250 |
2.89-3.14 |
31.0-34.0 |
3.9-4.3 |
|
Y33 |
410-430 |
4.1-4.3 |
220-250 |
2.76-3.14 |
225-255 |
2.83-3.20 |
31.5-35.0 |
4.0-4.4 |
|
Y33H |
410-430 |
4.1-4.3 |
250-270 |
3.14-3.39 |
250-275 |
3.14-3.46 |
31.5-35.0 |
4.0-4.4 |
|
Y34 |
420-440 |
4.2-4.4 |
200-230 |
2.51-2.89 |
205-235 |
2.58-2.95 |
32.5-36.0 |
4.1-4.5 |
|
Y35 |
430-450 |
4.3-4.5 |
215-239 |
2.70-3.00 |
217-241 |
2.73-3.03 |
33.1-38.2 |
4.2-4.8 |
|
Y36 |
430-450 |
4.3-4.5 |
247-271 |
3.10-3.41 |
250-274 |
3.14-3.44 |
35.1-38.3 |
4.4-4.8 |
|
Y38 |
440-460 |
4.4-4.6 |
285-305 |
3.58-3.83 |
294-310 |
3.69-3.90 |
36.6-40.6 |
4.6-5.1 |
|
Y40 |
440-460 |
4.4-4.6 |
330-354 |
4.15-4.45 |
340-360 |
4.27-4.52 |
37.5-41.8 |
4.7-5.3 |
|
American Standard |
C1 |
230 |
2.3 |
148 |
1.86 |
258 |
3.5 |
8.36 |
1.05 |
|
C5 |
380 |
3.8 |
191 |
2.4 |
199 |
2.5 |
27 |
3.4 |
|
C7 |
340 |
3.4 |
258 |
3.23 |
318 |
4 |
21.9 |
2.75 |
|
C8 / C8A |
385 |
3.85 |
235 |
2.95 |
242 |
3.05 |
27.8 |
3.5 |
|
C8B |
420 |
4.2 |
232 |
2.913 |
236 |
2.96 |
32.8 |
4.12 |
|
C9 |
380 |
3.8 |
280 |
3.516 |
320 |
4.01 |
26.4 |
3.32 |
|
C10 |
400 |
4 |
280 |
3.52 |
284 |
3.57 |
30.4 |
3.82 |
|
C11 |
430 |
4.3 |
200 |
2.512 |
204 |
2.56 |
34.4 |
4.32 |
|
C12 |
400 |
4 |
290 |
3.65 |
318 |
4 |
32 |
4 |
Typical Physical Properties (All Sintered ferrite Grades)
|
Parameter |
Unit |
Value |
|
Density / ρ |
g/cm3 |
4.9-5.1 |
|
Vickers Hardness / HV |
– |
400-700 |
|
Compression Strength |
N/mm2 |
680-720 |
|
Coefficient of Thermal Expansion / α |
10-6/°C |
C⊥: 10 |
|
C∥: 15 |
|
Electrical Resistance / ρ |
mΩ·cm |
1 x 1010 |
|
Thermal Conductivity / k |
W/(cm·°C) |
0.029 |
|
Tensile Strength / σ |
Pa |
34 x 106 |
|
Modulus of Elasticity / λ |
Pa |
1.8 x 1011 |
|
Flexural Strength / σ |
Pa |
62 x 106 |
|
Compression Strength |
Pa |
895 x 106 |
|
Poisson’s Ratio / v |
– |
0.28 |
Magnetization Orientations Available
Dimension Capability
Arc magnets are defined by outer radius (R), inner radius (r), arc angle (θ), and axial length (L). Standard tolerance is ± 0.1 mm on all dimensions; tight-tolerance ± 0.03 mm available on request. Skewed and twisted configurations supported for cogging-torque reduction.
|
Dimension |
Minimum |
Maximum |
Standard Tol. |
|
Outer Radius (R) |
5 mm |
200 mm |
± 0.1 mm |
|
Inner Radius (r) |
3 mm |
195 mm |
± 0.1 mm |
|
Arc Angle (θ) |
15° |
180° |
± 0.2° |
|
Axial Length (L) |
5 mm |
300 mm |
± 0.1 mm |
|
Thickness (t = R–r) |
2 mm |
25 mm |
± 0.1 mm |
Design Support
How to Specify Arc Ferrite Magnets
Grade Selection
Common grades include Y25, Y30, Y30BH, Y35, Y40 and C5/C8 series. Higher grades improve flux output, while high-coercivity grades are selected for stronger demagnetization resistance.
Motor Matching
Outer radius, inner radius, arc angle, thickness, axial length, air gap and pole count should be reviewed together to balance torque, efficiency, noise and assembly cost.
Cost-Effective Production
Ferrite magnets are ideal for stable, large-volume applications where corrosion resistance, long service life and competitive unit cost are more important than rare-earth magnetic strength.
Custom Manufacturing
Available Custom Features
Arc segment, tile magnet, multi-segment rotor set, chamfered edge, special radius, custom angle, and precision-ground surface.
Fan motor, pump motor, appliance motor, blower motor, generator, toy motor and industrial drive.
Radial, parallel, thickness direction, paired poles, matched rotor set and fixture-specific magnetization.
Stable air-gap flux, reduced assembly variation and consistent motor output.
Grinding, chamfering, cleaning, sorting, epoxy marking, packing by pole direction and optional surface protection.
Automated assembly, bonded rotor production, export packing and high-volume OEM supply.
Production Control
Manufacturing & Quality Assurance
Arc ferrite magnets are produced from ferrite powder through wet or dry pressing, magnetic-field orientation, high-temperature sintering, grinding, cleaning, magnetization and final inspection. Stable powder control and tooling consistency are essential for repeatable magnetic output in mass production.
Magnetic Inspection
Br, Hcb, Hcj, (BH)max, surface flux, polarity direction and batch consistency can be checked according to customer specification.
Dimensional Inspection
Outer radius, inner radius, arc angle, length, thickness, chamfer, flatness and rotor-set matching are inspected before packing.
Supply Support
Sample development, pilot production, mass production, magnetic report, dimensional report, RoHS/REACH documents and custom packing are available.
Fast Quotation
Information Needed for Fast Quotation
For faster review, please provide drawing or sample, outer radius, inner radius, arc angle, axial length, thickness, tolerance, grade or target surface flux, magnetization direction, working temperature, sample quantity and annual volume. If the grade is not fixed, we can recommend a ferrite grade based on motor performance and cost target.
Frequently Asked Questions
What grades are available for arc ferrite magnets?
Common grades include: Y30, Y35, Y40, C5, C8, higher grades provide stronger magnetic performance.
What is the minimum order quantity for custom arc magnets?
For custom geometry, samples can be arranged from as few as 50–200 pieces. Mass-production MOQ is typically 1000–10000 pieces per specification, though this is flexible depending on magnet size and grade. Contact us to discuss your project volume.
Can you supply arc magnets already assembled into a rotor?
Yes. Vanguard provides integrated rotor assembly services — including magnet bonding, balancing, and shaft press-fitting — as part of our Magnetic Systems product line. We can supply bare arc magnets or complete rotor sub-assemblies depending on your manufacturing flow.
Do you provide material certifications and test reports?
Full material certificates (chemical composition, magnetic test data) are provided with each shipment as standard. ROHS, REACH, and conflict-mineral declarations are available on request.
What is the lead time for arc ferrite magnets?
Prototype samples: 10–15 working days. Mass-production orders: 25–35 working days depending on grade, coating, and quantity. Rush sampling may be available — please inquire.
