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Custom Bonded Magnet (Ferrite) 

Low density,High impact strength

Topmag has a variety of Sizes and specifications of Bonded Magnet. We have professional design team to meet your special needs. Ask for a quotation or contact us for more information on Bonded Magnet


Bonded magnets are a permanent magnet for injection molding. 

  • Sizes & Shapes:
GradeSpecificationPolesApplicationImage
PA12OD52-ID36-25


PA12OD52-ID36-20

FA19+PA6OD49.4-ID5-32

PA12OD57-ID36-30

FA19OD30-3.17-7with shaft

FA19OD55.05+/-0.05-ID49+0.05-0.2-11.54
DG14/PA6OD8-ID1-26Robot
FA22OD58.4-ID52.8-1510TPW
Ferrite+SmFeNOD58.4-ID52.8-1510TPW
FA19OD152.3-ID133.6-24Inner 16Ceiling Fan
FA19OD152-ID133-22.5Inner 14Ceiling Fan
FA19OD113.5-ID94.2-22Inner 10, 4 slotsFan
FA19OD102.8-ID86.2-25Inner 10 Ceiling Fan
FA20OD152-ID133.6-24.8Inner 16 Ceiling Fan
FA19OD152.25-ID135-24Inner 16 Ceiling Fan
FA19OD152±0.1-ID132.7+0.2-24Inner 16 Ceiling Fan
FA20OD120-ID101-24Inner 14 Ceiling Fan
FA19OD152-ID132.2-25Inner 16Ceiling Fan
On-line Calculators
Rare Earth Data Book
  • M​anufacturing:
It can be used in general machining method of general-purpose plastics (such as injection molding, extrusion, etc.) for processing, can be processed into size high precision thin wall complex shape products, with insert molding products, realize the miniaturization, electromagnetic equipment lightweight, precision and high performance.

  • ​Surface Treatments:
Bonded (ferrite) magnets have good oxidation resistance and usually do not require protective coating, plating or surface treatment.
  • ​Te​​mperature Considerations:


Bonded magnets can be used at temperatures up to approximately  (130℃~150℃). The magnetic properties of this material decrease fairly

linearly with increasing temperature.

  • Common Applications:

Audio equipment: coupler, phonograph with rotating transformer, TV receiver and computer monitors, CRT, color purity convergence adjusting ring, motor and sensor, FG CD and VCD tape recorder rotating head drive motor, door motor, magnet and earphone loudspeaker magnet tape recorder.


Household appliances: refrigerators, refrigerator door sealing strip, disinfection cabinet, bathroom, washing machine drain valve motor, timer motor,electric cooker seat, TV sets, video recorders, refrigerators, washing machine, vacuum cleaners and other electrical components.


Computer and office: a floppy drive motor, feed motor, cooling type axial flow fan, CRT display correction device; electrostatic copier magnetic roller, magnetic roller, cleaning the fax machine in the magnetic roller, magnetic roller laser printer;


Automotive Industry: Auto contactless distributor, magnetic gasket, stepping motor for fuel injection pump, shockproof sticking board;Health, culture: magnetic health care products, magnetic therapy mattress, magnetic rotor, toilet soap box; magnetic drawing board, student stationery, teaching aids, advertising, display magnetic blackboard; furniture door buckle, various magnetic toys etc..

  • Material Information: 

Test method
companyWN-022kWN-102
WN-132WN-152NWN-172A
Magnetic Propertims

ISOTROPICANISOTROPICANISOTROPICANISOTROPICANISOTROPIC
Residual flux density(Br)-mT105215232260272
Coercive force(bHc)-kA/m80160175195195
Intrinsic coercive force (iHc)-kA/m159270263265235
Maximum energy product(Bhmax)-KJ/m³1.58.510.813.314.5
Thermal coefficient(▲Br/Br)-%/℃-0.19-0.19-0.19-0.19-0.19
Thermal coefficient (▲Hc/Hc)-%/℃0.2~0.30.2~0.30.2~0.30.2~0.30.2~0.3
OTHER PROPERTIMS






Tensill StrengthASTMD-638Mpa4354495858
Flexural StrengthASTMD-790Mpa749588108108
Flexural modulusASTMD-790Mpa6000750085001000010000
Lzod impact (with notch)ASTMD-256J/m2534313133
Rockwell hardnessASTMD-785R scale108108108114115
Rockwell deflection temperatureASTMD-648118120110141145
Specific gravityASTMD-792...2.843.033.293.383.52
Water absorptionASTMD-570%0.060.050.050.040.04
Molding Shrinkage coefficientDIC Method%0.70.60.60.60.5
Coefficient of thermal expansionDIC Method/℃8.0×10^-57.2×10^-47.0×10^-55.6×10^-55.4×10^-5
Melt flow rate(270℃×5kg)ASTMD-638G/10min-904060-
Melt flow rate(270℃×10kg)ASTMD-638G/10min----120
FlammabilityUI94Class--V-2V-1V-0
  • Bonded Ferrite Magnetic Properties:
                                           GradeFA11FA15FA19FA20TFA22T
                                 Resin BinderPA6




Magnetic Properties

Residual InductionBrmT(Gs )

213

2130

245

2450

284

2840

293

2930

305

3050

Coercive ForceHcbkA/m(Oe )

162

2040

183

2300

195

2450

193

2420

191

2400

HcjkA/m(Oe )

279

3500

251

3150

235

2950

223

2800

229

2870

Maximum Energy  Product(BH)maxkJ/m3 (MGOe )

8.8

1.10

11.9

1.50

15.6

1.96

16.6

2.08

18.1

2.27


Mechanical Properties

Tensile StrengthMPa8585
908580
Flexural StrengthMPa160
165170160145
Izod Impact StrengthkJ/m25035191511



Physical  Properties

Densityg/cm33.033.323.603.703.85
Melt Flow Rate (270℃/10kg)g/10min100
801208050
Rev.Temp. Coef. of Br%/K-0.19
-0.19-0.19-0.19-0.19
Rev.Temp. Coef. of Hcj%/K0.13
0.130.130.130.13
Molded Shrinkage%0.70.40.40.40.3




Injection  Parameters

Pre-drying Temp.100~120100~120100~120100~120100~120
Pre-drying Timehr4~84~84~84~84~8
Injection Temp.250~270260~280265~285270~290275~295
Mold Temp.60~8060~8060~8060~8060~80
Pressurebar60~9070~10060~9065~9570~100
SpeedV%40~7045~7545~7545~7550~80
​​Your Custom Bonded Magnet Project - How Can We Help? 
It is very important to get the best solution with the industry team Precipitation for10 years, Top magnet all  have multiple countries more projects in the field of knowledge accumulation, we have professional magnetic products detection machine,in the work of the performance of the products FEA tool, we have the temperature changed into for your project and application of technical support and reference data,  Contact us or ask for a quotation to find out more about Bonded Magnet