China permanent magnet manufacturer: www.rizinia.com

N50 NdFeB Arc Magnet R11.15xR8.4×12.21mmx1.1mmx2.75mm

Port: Ningbo or Shanghai, China 
Production Capacity: 500000000PCS/Season
Payment Terms: L/C, T/T, D/P, Western Union, Paypal, Money Gram
Magnetization Direction: Axial/Radial/Multi-Poles/Thickness magnetization
Color: Silver, golden
Coating: Nickel,Copper,Gold,Silver,Zinc
Grade: N35-N52
Shape: Disc countersunk,block countersunk,Arc countersunk
Material: Sintered Neodymium-Iron-Boron
HS Code: 8505111000
Tolerance: +/- 0.05mm
Transport Package: Carton, Wood Case, Anti-Magnetized Package
Sample: Avaliable
OEM: Acceptable
Application: Electronic Products, Speaker Magnet, Industrial Magnet, Jewelry Magnet, Solenoid, Motor Magnet

  • PRODUCT DETAIL

Specification of N50 NdFeB Arc Magnet R11.15xR8.4×12.21mmx1.1mmx2.75mm
Size R11.15xR8.4×12.21mmx1.1mmx2.75mm
Tolerance The diameter is ± 0.05mm and the thickness is ± 0.1mm
Coating Nickel copper nickel
Magnetization direction Thickness magnetization
Working temperature The maximum working temperature is 80 ℃

Typical Magnetic Properties of Sintered NdFeB Magnets

Grade

Max. Energy Product

Remanence

Coercive Force

Rev. Temp. Coeff.

Curie Temp.

Max. Working Temp.

(BH)max

Br

Hc

Hci

Bd

Hd

Tc

Tw

MGOe

kJ/m3

kG

mT

kOe

kA/m

kOe

kA/m

%/°C

%/°C

°C

°C

N27

25-29

199-231

10.50

1050

>10.0

>796

>12.0

>955

-0.12

-0.60

310

80

N30

28-31

223-247

11.00

1100

>10.2

>812

>12.0

>955

-0.12

-0.60

310

80

N33

31-33

247-263

11.50

1150

>10.5

>836

>12.0

>955

-0.12

-0.60

310

80

N35

33-36

263-287

12.00

1200

>10.9

>868

>12.0

>955

-0.12

-0.60

310

80

N38

36-39

287-310

12.40

1240

>11.3

>899

>12.0

>955

-0.12

-0.60

310

80

N40

38-41

302-326

12.70

1270

>11.4

>907

>12.0

>955

-0.12

-0.60

310

80

N42

40-43

318-342

13.00

1300

>11.5

>915

>12.0

>955

-0.12

-0.60

310

80

N45

43-46

342-366

13.50

1350

>11.6

>923

>12.0

>955

-0.12

-0.60

310

80

N48

46-49

366-390

14.00

1400

>11.6

>923

>12.0

>955

-0.12

-0.60

310

80

N50

48-51

382-406

14.30

1430

>10.3

>820

>12.0

>955

-0.12

-0.60

310

80

N52

50-53

398-422

14.50

1450

>10.3

>820

>11.0

>877

-0.12

-0.60

310

80

N30M

28-31

223-247

11.00

1100

>10.2

>812

>14.0

>1114

-0.12

-0.59

320

100

N33M

31-33

247-263

11.50

1150

>10.5

>836

>14.0

>1114

-0.12

-0.59

320

100

N35M

33-36

263-287

12.00

1200

>10.9

>868

>14.0

>1114

-0.12

-0.59

320

100

N38M

36-39

287-310

12.40

1240

>11.4

>907

>14.0

>1114

-0.12

-0.59

320

100

N40M

38-41

302-326

12.70

1270

>11.6

>923

>14.0

>1114

-0.12

-0.59

320

100

N42M

40-43

318-342

13.00

1300

>12.0

>955

>14.0

>1114

-0.12

-0.59

320

100

N45M

43-46

342-366

13.50

1350

>12.5

>995

>14.0

>1114

-0.12

-0.59

320

100

N48M

46-49

366-390

14.00

1400

>12.9

>1027

>14.0

>1114

-0.12

-0.59

320

100

N50M

48-51

382-406

14.30

1430

>13.1

>1043

>14.0

>1114

-0.11

-0.58

320-350

100

N30H

28-31

223-247

11.00

1100

>10.2

>812

>17.0

>1353

-0.11

-0.58

320-350

120

N33H

31-34

247-271

11.50

1150

>10.5

>836

>17.0

>1353

-0.11

-0.58

320-350

120

N35H

33-36

263-287

12.00

1200

>10.9

>868

>17.0

>1353

-0.11

-0.58

320-350

120

N38H

36-39

287-310

12.40

1240

>11.4

>907

>17.0

>1353

-0.11

-0.58

320-350

120

N40H

38-41

302-326

12.70

1270

>11.6

>923

>17.0

>1353

-0.11

-0.58

320-350

120

N42H

40-43

318-342

13.00

1300

>12.0

>955

>17.0

>1353

-0.11

-0.58

320-350

120

N45H

43-46

342-366

13.50

1350

>12.5

>999

>17.0

>1353

-0.11

-0.58

320-350

120

N48H

46-49

366-390

14.00

1400

>12.9

>1027

>17.0

>1353

-0.11

-0.55

340-360

120

N30SH

28-31

223-247

11.00

1100

>10.2

>812

>20.0

>1592

-0.11

-0.55

340-360

150

N33SH

31-34

247-271

11.50

1150

>10.6

>844

>20.0

>1592

-0.11

-0.55

340-360

150

N35SH

33-36

263-287

12.00

1200

>11.0

>876

>20.0

>1592

-0.11

-0.55

340-360

150

N38SH

36-39

287-310

12.40

1240

>11.4

>907

>20.0

>1592

-0.11

-0.55

340-360

150

N40SH

38-41

302-326

12.70

1270

>11.8

>939

>20.0

>1592

-0.11

-0.55

340-360

150

N42SH

40-43

318-342

13.00

1300

>12.4

>987

>20.0

>1592

-0.11

-0.55

340-360

150

N45SH

43-46

342-366

13.50

1350

>12.6

>1003

>20.0

>1592

-0.11

-0.51

350-380

150

N28UH

26-29

207-231

10.60

1060

>9.6

>764

>25.0

>1990

-0.11

-0.51

350-380

180

N30UH

28-31

223-247

11.00

1100

>10.2

>812

>25.0

>1990

-0.11

-0.51

350-380

180

N33UH

31-34

247-271

11.50

1150

>10.8

>860

>25.0

>1990

-0.11

-0.51

350-380

180

N35UH

33-36

263-287

12.00

1200

>11.3

>899

>25.0

>1990

-0.11

-0.51

350-380

180

N38UH

36-39

287-310

12.40

1240

>11.5

>915

>25.0

>1990

-0.11

-0.51

350-380

180

N40UH

38-41

302-326

12.70

1270

>11.8

>939

>25.0

>1990

-0.11

-0.51

350-380

180

N28EH

26-29

207-231

10.70

1070

>9.8

>780

>30.0

>2388

-0.11

-0.51

350-380

200

N30EH

28-31

223-247

11.10

1110

>10.2

>812

>30.0

>2388

-0.11

-0.51

350-380

200

N33EH

31-34

227-271

11.50

1150

>10.8

>860

>30.0

>2388

-0.11

-0.51

350-380

200

N35EH

33-36

263-287

12.00

1200

>11.1

>884

>30.0

>2388

-0.11

-0.51

350-380

200

N38EH

36-39

287-310

12.40

1240

>11.5

>915

>30.0

>2388

-0.11

-0.51

350-380

200

N28AH

26-29

207-231

10.70

1070

>9.8

>780

>35.0

>2786

-0.11

-0.51

350-380

220

N30AZ

28-31

223-247

11.10

1110

>10.2

>812

>35.0

>2786

-0.11

-0.51

350-380

220

N33AH

31-34

227-271

11.50

1150

>10.8

>860

>35.0

>2786

-0.11

-0.51

350-380

220

N35AH

33-36

263-287

12.00

1200

>11.1

>884

>35.0

>2786

-0.11

-0.51

350-380

220

Grade & Working Temperature:

Grade

Max Operating Temperatures

N35-N50

80°C     (176°F)

35M-48M

100°C   (212°F)

35H-45H

120°C   (248°F)

33SH-42SH

150°C   (302°F)

28UH-38UH

180°C   (356°F)

Neodymium Special Shaped Magnets with other Coating are also available:


Coating Type Overall Thickness Salt Spray Test Pressure Cooker Test
Ni-Cu-Ni (Nickel) 15-21 μm 24 hours 48 hours
NiCu + Black Nickel 15-21 μm 24 hours 48 hours
NiCuNi + Epoxy 20-28 μm 48 hours 72 hours
NiCuNi + Gold 16-23 μm 36 hours 72 hours
NiCuNi + Silver 16-23 μm 24 hours 48 hours
Zinc 7-15 μm 12 hours 24 hours

Each individual layer of Nickel and Copper are 5-7 μm thick. The Gold and Silver Coating layers are 1-2 μm thick. Test results shown to allow comparison between Coating options. Performance in your application under your specific test conditions may vary. Salt Spray testing conducted with a 5% NaCl solution, at 35°C. Pressure Cooker Test (PCT) conducted at 2 atm, 120°C at 100% RH.

Shape Max Size Min Size
Block L240*100*50mm L1*1*0.5mm
Disc/Cylinder D240*50mm D1*0.5mm
Ring OD240*40mm (hole size flexible as requested) D1.5*0.5*1mm
Countersunk OD240*40mm (hole size flexible as requested) D8*2.5mm (hole size as customized)

Other special shapes

per as your request per as your request

How to detect the quality of arc magnet?

The quality of strong NdFeB magnet is evaluated from two aspects: 1. Product performance; 2. Product appearance.

Product performance

There is a unified standard for the properties of Nd-Fe-B. the main indexes include magnetic energy product, coercivity and remanence.

Product appearance

Appearance inspection can be divided into five categories:

  • 1. Scratches (including scratches, line marks, knife marks, etc.);

  • 2. Pockmarks (including pockmarks, pockmarks, bubbles, scars, slag layer, local thickness, electroplating tumor);

  • 3. Cracks (including cracks, cracks, etc.);

  • 4. Edge chipping (including edge chipping, edge chipping and material residue);

  • 5. Sand hole (including sand hole, air hole, pinhole, particle, etc.) to see whether there are missing edges and corners, whether the electroplated coating is in good condition, and whether the size meets the design requirements; Neodymium iron boron is generally electrodeposited to protect it from corrosion and rust. It is usually placed on a plane that can be adsorbed with a magnet of the same specification, such as a patch, blade, iron door, etc. the size of the magnetic force can be distinguished by the hand feeling.

Testing method of NdFeB arc magnet

  • 1. For the products provided by the new supplier, according to the drawing requirements, first measure the overall dimension, and then measure the magnetic induction intensity with Gauss meter according to the brand of the magnet to check whether it is within the required range. Whether the magnetization direction is correct.
  • 2. Conduct temperature rise and demagnetization test for 3-5 samples, mark three positions on each magnet, measure the magnetic induction strength of each magnet at three positions at room temperature, then put the magnet into the high temperature box, set the temperature at 75 ℃ and heat it at high temperature for 1 hour, then take out the magnet to measure the magnetic induction strength of the same three positions, make a record, cool it to room temperature, and then measure it in turn. Then set the temperature of high temperature box to 85 ℃ and 95 ℃ for measurement respectively, and the measurement method is the same as that of 75 ℃.
  • 3. Check the measurement statistics, the demagnetization amount is less than 1% at 85 ℃
  • 4. The salt spray test has been done by the supplier and the test report has been provided. The test time is more than 48 hours.
  • 5. For the magnets used in batches, the appearance and dimension, magnetic induction strength of each batch shall be inspected to ensure the consistency within the batch: the open circuit magnetic flux is less than 2%, and the magnetic flux between batches is less than 3%
  • 6. Several important technical parameters of magnets, such as coercivity, intrinsic coercivity and remanence, can not be measured. In the past, the supplier provided the testing parameters, and in the future, we can take a few pieces of each batch to a special testing agency for inspection.

Detection tools used

Micrometer, vernier caliper, Gauss meter, fluxmeter, film thickness meter and other measuring tools are generally used in the detection of finished NdFeB magnets.
The film thickness meter mainly measures the plating layer thickness of NdFeB magnet. The film thickness meter can effectively monitor the plating quality and flexibly adjust the magnet plating.
Micrometer and vernier caliper are mainly used to measure the tolerance of NdFeB magnet. The unit is mm.
Gauss meter is mainly used to measure the magnetic force of a point on the surface of the magnet, unit Gauss. Because the magnetic force of each point on the surface of the magnet is different, and the edge magnetic force is higher than that of the center point, the measured data error is too large.
Fluxmeter mainly measures the magnetic force of one side of NdFeB magnet, in Weber WB. Compared with Gauss meter, fluxmeter measures more objective and accurate data.
China Arc Magnet Manufacturer www.rizinia.com supplies Arc Magnet for scientific experiments or for industrial applications, in kinds of materials such as NdFeB/NIB/neodymium iron boron, etc.
This product is not a toy and is not to be used by children. This product is to be used for scientific experiments or for industrial applications. This product contains strong Neodymium magnet(s) that can be harmful or fatal if swallowed. Strong Neodymium magnets are fragile, they are brittle and will break or chip if they hit a hard surface or are snagged together. Always use the utmost care when handling Neodymium magnets.

Summary
n50 ndfeb arc magnet r11 15xr8 4x12 21mmx1 1mmx2 75mm 1 - N50 NdFeB Arc Magnet R11.15xR8.4x12.21mmx1.1mmx2.75mm
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5 based on 6 votes
Brand Name
Actility
Product Name
N50 NdFeB Arc Magnet R11.15xR8.4x12.21mmx1.1mmx2.75mm
Price
USD 0.001-9999
Product Availability
Pre-Order Only
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