Gold Member Since 2015
Audited Supplier
Dongguan Cirun Electronics Co., Ltd.

Ring Magnets, Small Ring Magnets, Neodymium Ring Magnet manufacturer / supplier in China, offering Sintered Rare Earth Neodymium Small Ring Magnets, China Manufacturer Super Strong High Grade Rare Earth Sintered Permanent Rotor Magnet/NdFeB Magnet/Neodymium Magnet, Wholesale Hard Arc Ferrite Motor Magnets and so on.

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Supplier Homepage Product Sintered NdFeB Magnets Sintered Rare Earth Neodymium Small Ring Magnets

Sintered Rare Earth Neodymium Small Ring Magnets

Purchase Qty.:
(Pieces)
1,000-99,999 100,000+
FOB Unit Price: US $0.5 US $0.1
Purchase Qty. (Pieces) FOB Unit Price
1,000-99,999 US $0.5
100,000+ US $0.1
Get Latest Price
Production Capacity: 500000PCS/Month
Transport Package: Professional Export Standard Packing
Payment Terms: L/C, T/T, D/P, Western Union, Paypal

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Basic Info
  • Application: Speaker Magnet, Industrial Magnet, Solenoid, Motor Magnet
  • Coating: Nickel, Zinc, Ni-Cu-Ni and Customized
  • Type: Permanent
  • Process Techinic: Sintering
  • Trademark: Neutral, Customized
  • Origin: Guangdong, China
  • Shape: Cylinder, Also Can Do Ring,Block, Disc,Arc
  • Grade: N35, N38, N40, N42, N45, N48, N50, N52
  • Composition: Neodymium Iron Boron
  • Size and Shape: Can Be Customized
  • Specification: ISO9001: 2008, RoHS, SGS
  • HS Code: 8505119000
Product Description
sintered rare earth neodymium ring magnets

The size and shape can be customized.
 
Description:
 
Product Name: sintered rare earth neodymium ring magnets

Applications: NdFeB rare earth bar magnets are Widely used in different applications, such as sensors, motors, rotors, wind turbines/wind generators, loudspeakers, magnetic hooks, magnetic holder, filters automobiles and so on.

Material: NdFeB (Neodymium Iron Boron)

Shape: ring (Customized shapes for Sintered NdFeB  Magnet are available.)

Tolerance in size: +/-0.05mm or +/-0.1mm

Type of coating:  Ni-Cu-Ni, Nickel, Zn, Gold, Silver, Copper, Epoxy, Chemical, PTFE,

Parylene, Everlube, Passivation and more.

Grade:  N35-N52; N33M-N50M; N33H-N48H; N30SH-N45SH;N30UH-N40UH; N28EH-N38EH,N28AH-N35AH.
 
Magnetic Characteristics:
                                                               

Material Type
 

Residual Flux 
Density(Br)

Coercive Force(Hc)

Intrinsic Coercive 
Force (Hci)

Max.Energy Product
(BH)max

N35

11.7-12.1 KGs

>11.0 KOe

>12 KOe

33-35 MGOe

N38

12.2-12.6 KGs

>11.0 KOe

>12 KOe

36-38 MGOe

N40

12.6-12.9 KGs

>11.0 KOe

>12 KOe

38-40 MGOe

N42

13.0-13.2 KGs

>11.0 KOe

>12 KOe

40-42 MGOe

N45

13.3-13.7 KGs

>11.0 KOe

>12 KOe

43-45 MGOe

N48

13.8-14.2 KGs

>11.0 KOe

>12 KOe

45-48 MGOe

N50

14.1-14.5 KGs

>11.0 KOe

>11 KOe

48-50 MGOe

N52

14.5-14.8 KGs

>11.2 KOe

>11 KOe

49.5-52 MGOe

N35M

11.7-12.1 KGs

>11.4 KOe

>14 KOe

33-35 MGOe

N38M

12.2-12.6 KGs

>11.4 KOe

>14 KOe

36-38 MGOe

N40M

12.6-12.9 KGs

>11.4 KOe

>14 KOe

38-40 MGOe

N42M

13.0-13.3 KGs

>11.4 KOe

>14 KOe

40-42 MGOe

N45M

13.3-13.7 KGs

>11.4 KOe

>14 KOe

42-45 MGOe

N48M

13.6-14.2 KGs

>11.4 KOe

>14 KOe

45-48 MGOe

N50M

14.1-14.5 KGs

>11.4 KOe

>14 KOe

48-50 MGOe

N33H

11.4-11.7 KGs

>10.3 KOe

>17 KOe

31-33 MGOe

N35H

11.7-12.1 KGs

>10.8 KOe

>17 KOe

33-35 MGOe

N38H

12.2-12.6 KGs

>11.4 KOe

>17 KOe

36-38 MGOe

N40H

12.6-12.9 KGs

>11.4 KOe

>17 KOe

38-40 MGOe

N42H

13.0-13.3 KGs

>11.4 KOe

>17 KOe

40-42 MGOe

N45H

13.3-13.7 KGs

>11.4 KOe

>17 KOe

42-45 MGOe

N48H

13.6-14.2 KGs

>11.4 KOe

>16 KOe

45-48 MGOe

N30SH

10.8-11.2 KGs

>10.1 KOe

>20 KOe

28-30 MGOe

N33SH

11.4-11.7 KGs

>10.3 KOe

>20 KOe

31-33 MGOe

N35SH

11.7-12.1 KGs

>10.8 KOe

>20 KOe

33-35 MGOe

N38SH

12.2-12.6 KGs

>11.4 KOe

>20 KOe

36-38 MGOe

N40SH

12.6-12.9 KGs

>11.4 KOe

>20 KOe

38-40 MGOe

N42SH

13.0-13.3 KGs

>11.4 KOe

>20 KOe

40-42 MGOe

N45SH

13.3-13.7 KGs

>11.4 KOe

>19 KOe

43-45 MGOe

N28UH

10.4-10.8 KGs

>9.8 KOe

>25 KOe

26-28 MGOe

N30UH

10.8-11.2 KGs

>10.1 KOe

>25 KOe

28-30 MGOe

N33UH

11.4-11.7 KGs

>10.3 KOe

>25 KOe

31-33 MGOe

N35UH

11.7-12.1 KGs

>10.8 KOe

>25 KOe

33-35 MGOe

N38UH

12.2-12.6 KGs

>11.4 KOe

>25 KOe

36-38 MGOe

N40UH

12.6-12.9 KGs

>11.4 KOe

>25 KOe

38-40 MGOe

N28EH

10.4-10.8 KGs

>9.8 KOe

>30 KOe

26-28 MGOe

N30EH

10.8-11.2 KGs

>10.1 KOe

>30 KOe

28-30 MGOe

N33EH

11.4-11.7 KGs

>10.3 KOe

>30 KOe

31-33 MGOe

N35EH

11.7-12.1 KGs

>10.8 KOe

>30 KOe

33-35 MGOe

N38EH

12.2-12.6 KGs

>10.8 KOe

>30 KOe

36-38 MGOe
 

Working Temperature

Grade

Max.Operating Temperature

N35-N52

80°C(176°F)

33M-48M

100°C(212°F)

33H-48H

120°C(248°F)

30SH-45SH

150°C(302°F)

30UH-40UH

180°C(356°F)

28EH-38EH

200°C(392°F)

28AH-35AH

220°C(428°F)

 
Plating Characteristics:
 
                                            

Plating Type

Overall Thickness

Salt Spray Test

Pressure Cooker Test

NiCuNi (Nickel Copper 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 plating layers are 1-2 μm
 thick.
Test results shown to allow comparison between plating options. 
Performance in your application under your specific test conditions may vary.
Salt Spray testing conducted with a 5% NaCl solution, at 35 ºC .
Pressure Cooker Test (PCT) conducted at 2 atm, 120 ºC at 100% RH.
 
 
FAQ:

In order to quote you the best price timely, please kindly provie the followsing information in your inquiry:
1) Product details: Shape&dimensions, grade, tolerances, coating, magnetization direction
2) Order quantity
3) Attached drawings if customized
4) Any special packing, delivring or oter requirements
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