Product Overview
Cylinder Ferrite Magnets
Cylinder ferrite magnets, also called round ferrite magnets or ceramic cylinder magnets, are cost-effective permanent magnets made from strontium ferrite or barium ferrite powder through pressing, sintering and precision finishing. Their simple cylindrical shape provides stable magnetic force, excellent corrosion resistance and reliable performance for high-volume industrial and consumer applications.
Compared with rare-earth magnets, cylinder ferrite magnets offer lower magnetic strength but excellent price stability, strong weather resistance, good electrical insulation and long service life under normal working temperatures. They are widely used in sensors, holding devices, toys, loudspeakers, educational products, motors, magnetic separators and general magnetic assemblies.
Ningbo Vanguard Technologies provides cylinder ferrite magnets in multiple standard grades, diameters, lengths and magnetization directions. Strict in-process control ensures consistent magnetic output, reliable dimensions and stable batch quality for automated assembly and mass production.
We supply both standard catalogue sizes and fully customized cylindrical magnets with special diameter, length, chamfer, center hole, slot or surface finish. Fast sample delivery within 10–15 days and stable mass production lead times are available for OEM and ODM projects.
Quick View
Cylinder Ferrite Magnet Selection Snapshot
Y25-Y40
Available Grade Range
Common ferrite grades including Y25, Y30, Y30BH, Y35, Y40 and C5/C8 series for cylinder, disc and rod magnets.
Stable Cost
Mass Production Advantage
A practical choice for high-volume sensors, holders, toys, speakers and general magnetic assemblies.
D / L
Cylinder Geometry Control
Diameter, length, chamfer, center hole, slot, surface finish and magnetization direction can be customized.
10-15 Days
Prototype Sample Lead Time
Fast sampling after grade, drawing, tolerance and magnetization direction are confirmed.
Ferrite Grade Selection Guide
Application Demand Focus
Holding Devices
Durability
1Drawing ReviewDiameter, length, chamfer, tolerance
2Grade MatchFlux, holding force, cost target
3Tooling PlanPressing, sintering, grinding
4MagnetizationAxial, diametrical, custom
5InspectionFlux, size, polarity, appearance
Key Applications
Magnetic Sensors
Used in reed switches, proximity sensors, position sensors and simple detection systems where stable magnetic triggering and low cost are required.
Holding Devices
Applied in magnetic holders, closures, display fixtures, tool retainers and low-cost magnetic catches that need corrosion-resistant and durable magnets.
Educational & Toy Magnets
Small cylinder ferrite magnets are widely used in science kits, educational tools, magnetic toys and demonstration products because they are economical and easy to handle.
Speakers & Acoustic Parts
Used in small loudspeakers, buzzers and acoustic modules where ferrite magnets provide stable magnetic field at a competitive cost.
Magnetic Separation
Cylinder ferrite magnets can be used in simple magnetic rods, sorting devices and low-cost separation tools for light industrial or educational applications.
General Assemblies
Suitable for meters, appliance components, packaging closures, magnetic labels and other products requiring stable low-cost magnetic force.
Grade & Magnetic Properties
Standard grades for cylinder ferrite magnets. All values at 20 °C. Values are typical; exact grade selection is confirmed per application, working gap, holding force, magnetization direction and cost target.
|
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
Cylinder ferrite magnets are defined by diameter (D) and axial length (L). Standard tolerance is ± 0.10 mm on common dimensions; tight-tolerance ± 0.05 mm is available after drawing review. Chamfering, center hole, slot, flat surface and polarity marking can be supplied on request.
|
Dimension |
Minimum |
Maximum |
Standard Tol. |
|
Diameter (D) |
1 mm |
120 mm |
± 0.10 mm |
|
Axial Length (L) |
1 mm |
150 mm |
± 0.10 mm |
|
Chamfer / Edge |
Optional |
Custom |
Per drawing |
Design Support
How to Specify Cylinder Ferrite Magnets
Grade Selection
Common grades include Y25, Y30, Y30BH, Y35, Y40 and C5/C8 series. Higher grades provide stronger magnetic output, while high-coercivity grades improve resistance to demagnetization.
Geometry Matching
Diameter, length, working gap, contact area, steel backing and magnetization direction should be reviewed together to reach the required pull force or flux output.
Cost-Effective Production
Ferrite cylinders are ideal for stable, large-volume applications where corrosion resistance, simple assembly and competitive unit cost are more important than rare-earth magnetic strength.
Custom Manufacturing
Available Custom Features
Cylinder, rod, short disc, long bar, chamfered cylinder, center-hole cylinder, stepped cylinder and custom end face.
Sensor, holder, speaker, educational kit, separator, latch and magnetic assembly.
Axial, diametrical, radial, paired polarity, marked polarity and fixture-specific magnetization.
Stable holding force, consistent sensor triggering and easy assembly identification.
Grinding, chamfering, cleaning, polarity marking, epoxy marking, adhesive backing and custom packing.
Automated assembly, export packing, retail sets and high-volume OEM supply.
Production Control
Manufacturing & Quality Assurance
Cylinder 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 tooling and powder control help keep diameter, length and magnetic output consistent in mass production.
Magnetic Inspection
Br, Hcb, Hcj, (BH)max, surface flux, pull force, polarity direction and batch consistency can be checked according to customer specification.
Dimensional Inspection
Diameter, length, roundness, chamfer, flatness, surface condition and polarity marking 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, diameter, axial length, tolerance, grade or target surface flux, magnetization direction, pull force requirement, working temperature, sample quantity and annual volume. If the grade is not fixed, we can recommend a ferrite grade based on performance and cost target.
Frequently Asked Questions
What grades are available for cylinder ferrite magnets?
Common grades include Y25, Y30, Y35, Y40, C5 and C8. Higher grades provide stronger magnetic performance, while high-coercivity grades improve demagnetization resistance.
What is the minimum order quantity for custom cylinder 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, depending on magnet size, grade and finishing requirement.
Can cylinder ferrite magnets be diametrically magnetized?
Yes. Axial magnetization is most common, but diametrical, radial and custom polarity directions can be supplied depending on size and fixture feasibility.
Do cylinder ferrite magnets require coating?
Usually no coating is required because ferrite magnets have excellent corrosion resistance. Optional coating, marking or adhesive backing can be discussed for special assembly needs.
What is the lead time for cylinder ferrite magnets?
Prototype samples: 10–15 working days. Mass-production orders: 25–35 working days depending on grade, size, finishing and quantity. Rush sampling may be available on request.
