1.Product Information
2.Magnet common shapes
3.Magnetizing method
![Neodymium Disc Countersunk Hole Magnets/Strong/Permanent/Rare Earth Magnets](https://img3.grofrom.com/magnethzxfco/eccf38a71826663fc28be2eccb6b8574.webp)
4.Available Coatings Of Sintered NdFeB Magnets
5.Magnet grade performance distribution chart
![Neodymium Disc Countersunk Hole Magnets/Strong/Permanent/Rare Earth Magnets](https://img3.grofrom.com/magnethzxfco/bd968d3d185c85f7ad84771d8f081e6a.webp)
6.The package
7.Production Process
![Neodymium Disc Countersunk Hole Magnets/Strong/Permanent/Rare Earth Magnets](https://img3.grofrom.com/magnethzxfco/d1f16d20aa8bdcc86554eb058a5b2c74.webp)
8.Testing Equipment
![Neodymium Disc Countersunk Hole Magnets/Strong/Permanent/Rare Earth Magnets](https://img3.grofrom.com/magnethzxfco/9cbb502a775a28a517adfd70aee0533f.webp)
9.Certificate
![Neodymium Disc Countersunk Hole Magnets/Strong/Permanent/Rare Earth Magnets](https://img3.grofrom.com/magnethzxfco/5376dfef37499a873d98a341f5bab1e4.webp)
10.Production execution standard reference
Product Information | ||
Product name | Permanent, Nd Rectangular Block magnet, Neo Rectangular Block magnet, Rare earth Rectangular Block magnet | |
Material | Neodymium iron boron, Neo Magnet, Nd Magnet, Rare earth Magnet | |
Grade & working Temperature | Grade | Max Operating Temperatures |
N35-N54 | 80°C (176°F) | |
35M-52M | 100°C (212°F) | |
35H-50H | 120°C (248°F) | |
33SH-48SH | 150°C (302°F) | |
28UH-45UH | 180°C (356°F) | |
28EH-42EH | 200°C (392°F) | |
28AH-40AH | 230°C (446°F) | |
Shape | Block or Rectangular or Cuboid, but Disc, Ring, Cylinder, Arc and Irregular shape are also available | |
Coating | Ni, Ni-Cu-Ni, Electroless Nickel, Zinc, Colored Zinc, Epoxy, Passivation, Phosphated, Everlube, Au, Ag, Sn etc. | |
Magnetized direction | Thickness Magnetized, but Axially, Diametrical, Multipoles and Radial magnetization are also available, Customized magnetization is welcome. | |
Application | Servo motor,Brushless motor, Linear Motor, Automotive Motor, HEV& EV motor, Robot Driving Motor, Inverter Compressor Motor , Rail Transit Traction Motor, Consumer Electronics, Wind turbine, Energy-saving Elevator, Loudspeaker, Magnetic switch, VCM, MRI, Magnetic separator, sensor etc. | |
Certificate | ISO/TS 16949, ISO9001, ISO14001, RoHS, REACH | |
Packing | Standard sea or air packing, such as carton, wooden box, pallet etc. | |
Lead time | 7 days for samples, 15-20 days for mass production. | |
Transportation | All shipping methods are available: courier (TNT, DHL, FedEx, UPS), air or sea. Shipper or freight forwarder can be appointed by either purchaser or TC. |
2.Magnet common shapes
1. Block Magnet | ||||||
Sort | Specification | Recommend Size | Extreme size | Dimension | Tolerance | Parallelism |
0.5≤L≤10 | ±0.03 | 0.04 | ||||
10≤L≤30 | ±0.05 | 0.06 | ||||
Cuboid type | L | ≤150 | ≤200 | 30≤L≤50 | ±0.08 | 0.08 |
W | ≤100 | ≤100 | L>50 | ±0.1 | 0.1 | |
T | ≤55 | ≤70 | ||||
2. Arc/C Magnet | ||||||
Sort | Specification | RecommendSize | Extreme size | Part | Dimension | Tolerance |
Thickness | T≤10 | ±0.04 | ||||
10≤T≤30 | ±0.05 | |||||
C type | L | ≤150 | ≤200 | Length | L≤10 | ±0.03 |
W | ≤100 | ≤100 | 10≤L≤30 | ±0.05 | ||
T | 2≤T≤30 | 1.5≤T≤50 | 30≤L≤50 | ±0.08 | ||
H | 3≤H≤50 | 3≤H≤60 | L>50 | ±0.1 | ||
Chordal Length | W≤50 | ±0.05 | ||||
W>50 | ±0.06 | |||||
3. Cylinder Magnet | ||||||
Sort | Specification | Recommend | Extreme size | Outter Diameter | Tolerance | Parallelism |
D≤10 | ±0.02 | 0.03 | ||||
Size | 10≤D≤30 | ±0.03 | 0.03 | |||
Cylinder type | D | ≤100 | ≤150 | D>30 | ±0.04 | 0.04 |
T | 0.5≤T≤45 | 0.5≤T≤60 | ||||
4. Ring Magnet | ||||||
Sort | Specification | Inner Diameter | Tolerance | Coaxiality | ||
d≤10 | ±0.04 | 0.06 | ||||
10≤d≤30 | ±0.05 | 0.06 | ||||
Ring type | D | 30≤d≤50 | ±0.06 | 0.08 | ||
d | d>50 | ±0.08 | 0.1 | |||
T |
3.Magnetizing method
![Neodymium Disc Countersunk Hole Magnets/Strong/Permanent/Rare Earth Magnets](https://img3.grofrom.com/magnethzxfco/eccf38a71826663fc28be2eccb6b8574.webp)
4.Available Coatings Of Sintered NdFeB Magnets
Available Coatings Of Sintered NdFeB Magnets | |||||
Coating | Thickness | Color | PCT | SST | Characteristic |
Zn | 4-8um | Bright Blue | / | >24H~48H | Regular Protection Applicable to most products |
Colored ZN | 4-8um | Shining Color | / | >48H-72H | Excellent salt spray resistance,Excellent adhesion |
NiCuNi | 10-20um | Bright Silver | >48H~72H | >24H-72H | Excellent humidity,heat&salt spray resistance |
Electroless Nickel | 10-20um | Bright Silver | >72H | >96H | Excellent humidity,heat&salt spray resistance |
Black Nickel | 10-20um | Bright Black | >72H | >48H-96H | Excellent humidity. heat xsalt spray resistance |
Sn | 10-20um | Silver | >48H | >36H-72H | Excellent humidity. heat&salt spray resistance |
Epoxy | 10-20um | Black or Grey | / | >72H~108H | Excellent humidity,heat&salt spray resistance,excellent adhesion |
Phosphated /Passivation | <=1um | Dark Grey | / | ≤2.5H Emerge in 3%Nad lovor | Temporary Protection |
Everlube | 8-20um | Yellow | >72H | >96H | Excellent salt spray resistance,Excellent adhesion |
Golden | 10-15um | Golden | >48H | >12H | Good looking |
5.Magnet grade performance distribution chart
![Neodymium Disc Countersunk Hole Magnets/Strong/Permanent/Rare Earth Magnets](https://img3.grofrom.com/magnethzxfco/bd968d3d185c85f7ad84771d8f081e6a.webp)
6.The package
1.The magnets are separated by plastic sheets for easy operation when removing Each block is wrapped in a plastic bag to prevent corrosion. | 2.Insert foam board, iron board, carton from inside to outside at once. Used for buffering, magnetic isolation and protection | 3. The small size magnet carton is individually packaged to ensure safe and convenient transportation, storage, and use. |
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4.The outer layer of the carton is fixed with plastic steel straps | 5.After packaging, measure the magnetic field intensity outside the carton to ensure compliance with air transport standards. | 6. Recycled wooden pallets, wrapped with waterproof membrane to prevent moisture and loss during sea transportation. |
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7.Production Process
![Neodymium Disc Countersunk Hole Magnets/Strong/Permanent/Rare Earth Magnets](https://img3.grofrom.com/magnethzxfco/d1f16d20aa8bdcc86554eb058a5b2c74.webp)
8.Testing Equipment
![Neodymium Disc Countersunk Hole Magnets/Strong/Permanent/Rare Earth Magnets](https://img3.grofrom.com/magnethzxfco/9cbb502a775a28a517adfd70aee0533f.webp)
9.Certificate
![Neodymium Disc Countersunk Hole Magnets/Strong/Permanent/Rare Earth Magnets](https://img3.grofrom.com/magnethzxfco/5376dfef37499a873d98a341f5bab1e4.webp)
10.Production execution standard reference
Process | Executive standard | Process record | Test record |
Order evaluation | CP / Products specification | Order review record | / |
Ingredients | CP / Raw-materials standard/ SOP | Preparation record Circulation card | Raw-materials test the reports The balances daily check record The balances calibrate record |
Smelt | CP / Strip casting standard /SOP | Strip casting process record | SC test the report |
Hydrogen break | CP / Hydrogen decrepitation standard / SOP | Hydrogen decrepitation process record Powder circulation card | / |
Jet mill | CP / Jet milling decrepitation standard / SOP | Jet milling process record | Particle size test report |
Forming | CP / Pressing standard SOP | Pressing process record Pressing block circulation card | / |
Sintering | CP / Sintering standard SOP | Sintering process record | NdFeB materials performance test report Size and density test report Surface test report Approval warehouse card |
Machining | CP Machining draw | Picking record Send the machining record | Machining products test report |
Surface treatment | CP Surface treatment draw | Send the surface treatment record Circulation card | Finished goods size hand surface test report |
Magnetization and packaging | CP / Packing specification SOP | Magnetized record Packing record | Finished goods performance test report |