High Temperature Tiny/Small Ring NdFeB Magnet for Meter

• Application: Industrial Magnet
• Shape: Ring
• Coating: Nickel
• Grade: Customize
• Type: Permanent
• Composition: NdFeB Magnet
• Model NO.: Ring NdFeB Magnet
• Transport Package: Standard Air or Sea Package
• Specification: ROHS, SGS
• Origin: Ningbo
• HS Code: 8505111000
• Production Capacity: 1000000 Pieces Per Month

Product Description

Strong Permanent Small Ring Neodymium Magnet

1. Materials: Neodymium-Iron-Boron;

2. Technology: Utilizes new Sintered NdFeB magnet techniques and equipment such as strip casting, HDDR technology;

3. Magnetic properties: High coercive force, the max operation temp is up to 200 degree centigrade or 380 curie temperature;

4. Grades: N35-N52, 30M-50M, 30H-48H, 30SH-45SH, 30UH-40UH and 30EH-38EH;

5. Shapes: Various shapes

6. Size: According to customers' request;

7. Coatings: Ni, Zn, gold, copper, epoxy, chemical, parylene and so on;

8. Applications: Widely used in different applications, such as sensors, motors, rotors, wind turbines/wind generators, loudspeakers, magnetic hooks, magnetic holder, filters automobiles and so on.


Block NdFeB magnet

Block NdFeB magnet is an alloy magnet made from ND, Fe, B and other trace metal elements. It is a rare earth magnet known so far for the strongest magnetism as well as high performance (8MGOe-55MGOe) and good coercive force. Proven production process, strict quality assurance, complete technical service and remarkable cost performance.

Machining and tolerances

Neodymium is easily ground, although coolants must be used in the process to avoid spontaneous combustion of powder. Grinding should be completed before coating or plating is applied to protect the magnets from corrosion. Standard tolerances for neodymium magnets are +/-0.05mm for ground dimensions.

Temperature constraints

The temperature coefficient of neodymium has triggered several grades to be developed to meet specific operating requirements. Please refer to our chart of magnetic properties to compare the characteristics of each grade. Before choosing a neodymium magnet be sure to consider your application's maximum operating temperature.

Added value services

Our knowledgeable engineering department is always available to assist in determining the best grade and size of neodymium magnet for your application. We also offer coating and plating choices for magnets we custom-machine.

Technical data of Sintered NdFeB
Grade	Br		Hcb		Hcj		(BH)max		(Tw)
	mT	(kGs)	kA/m	(kOe)	kA/m	(kOe)	kJ/m3	(MGOe)
N35	1170-1220	(11.7-12.2)	≥  868	(  ≥  10.9)	≥  955	(  ≥  12)	263-287	(33-36)	80  º C
N38	1220-1250	(12.2-12.5)	≥  899	(  ≥  11.3)	≥  955	(  ≥  12)	287-310	(36-39)	80  º C
N40	1250-1280	(12.5-12.8)	≥  907	(  ≥  11.4)	≥  955	(  ≥  12)	302-326	(38-41)	80  º C
N42	1280-1320	(12.8-13.2)	≥  915	(  ≥  11.5)	≥  955	(  ≥  12)	318-342	(40-43)	80  º C
N45	1320-1380	(13.2-13.8)	≥  923	(  ≥  11.6)	≥  955	(  ≥  12)	342-366	(43-46)	80  º C
N48	1380-1420	(13.8-14.2)	≥  923	(  ≥  11.6)	≥  876	(  ≥  12)	366-390	(46-49)	80  º C
N50	1400-1450	(14.0-14.5)	≥  796	(  ≥  10.0)	≥  876	(  ≥  11)	382-406	(48-51)	60  º C
N52	1430-1480	(14.3-14.8)	≥  796	(  ≥  10.0)	≥  876	(  ≥  11)	398-422	(50-53)	60  º C
30M	1080-1130	(10.8-11.3)	≥  796	(  ≥  10.0)	≥  1114	(  ≥  14)	223-247	(28-31)	100  º C
33M	1130-1170	(11.3-11.7)	≥  836	(  ≥  10.5)	≥  1114	(  ≥  14)	247-263	(31-33)	100  º C
35M	1170-1220	(11.7-12.2)	≥  868	(  ≥  10.9)	≥  1114	(  ≥  14)	263-287	(33-36)	100  º C
38M	1220-1250	(12.2-12.5)	≥  899	(  ≥  11.3)	≥  1114	(  ≥  14)	287-310	(36-39)	100  º C
40M	1250-1280	(12.5-12.8)	≥  923	(  ≥  11.6)	≥  1114	(  ≥  14)	302-326	(38-41)	100  º C
42M	1280-1320	(12.8-13.2)	≥  955	(  ≥  12.0)	≥  1114	(  ≥  14)	318-342	(40-43)	100  º C
45M	1320-1380	(13.2-13.8)	≥  995	(  ≥  12.5)	≥  1114	(  ≥  14)	342-366	(43-46)	100  º C
48M	1360-1430	(13.6-14.3)	≥  1027	(  ≥  12.9)	≥  1114	(  ≥  14)	366-390	(46-49)	100  º C
50M	1400-1450	(14.0-14.5)	≥  1033	(  ≥  13.0)	≥  1114	(  ≥  14)	382-406	(48-51)	100  º C
30H	1080-1130	(10.8-11.3)	≥  796	(  ≥  10.0)	≥  1353	(  ≥  17)	223-247	(28-31)	120  º C
33H	1130-1170	(11.3-11.7)	≥  836	(  ≥  10.5)	≥  1353	(  ≥  17)	247-271	(31-34)	120  º C
35H	1170-1220	(11.7-12.2)	≥  868	(  ≥  10.9)	≥  1353	(  ≥  17)	263-287	(33-36)	120  º C
38H	1220-1250	(12.2-12.5)	≥  899	(  ≥  11.3)	≥  1353	(  ≥  17)	287-310	(36-39)	120  º C
40H	1250-1280	(12.5-12.8)	≥  923	(  ≥  11.6)	≥  1353	(  ≥  17)	302-326	(38-41)	120  º C
42H	1280-1320	(12.8-13.2)	≥  955	(  ≥  12.0)	≥  1353	(  ≥  17)	318-342	(40-43)	120  º C
45H	1300-1360	(13-13.6)	≥  963	(  ≥  12.1)	≥  1353	(  ≥  17)	326-358	(43-46)	120  º C
48H	1370-1430	(13.7-14.3)	≥  995	(  ≥  12.5)	≥  1353	(  ≥  17)	366-390	(46-49)	120  º C
30SH	1080-1130	(10.8-11.3)	≥  804	(  ≥  10.1)	≥  1592	(  ≥  20)	223-247	(28-31)	150  º C
33SH	1130-1170	(11.3-11.7)	≥  844	(  ≥  10.6)	≥  1592	(  ≥  20)	247-271	(31-34)	150  º C
35SH	1170-1220	(11.7-12.2)	≥  876	(  ≥  11.0)	≥  1592	(  ≥  20)	263-287	(33-36)	150  º C
38SH	1220-1250	(12.2-12.5)	≥  907	(  ≥  11.4)	≥  1592	(  ≥  20)	287-310	(36-39)	150  º C
40SH	1240-1280	(12.5-12.8)	≥  939	(  ≥  11.8)	≥  1592	(  ≥  20)	302-326	(38-41)	150  º C
42SH	1280-1320	(12.8-13.2)	≥  987	(  ≥  12.4)	≥  1592	(  ≥  20)	318-342	(40-43)	150  º C
45SH	1320-1380	(13.2-13.8)	≥  1003	(  ≥  12.6)	≥  1592	(  ≥  20)	342-366	(43-46)	150  º C
28UH	1020-1080	(10.2-10.8)	≥  764	(  ≥  9.6)	≥  1990	(  ≥  25)	207-231	(26-29)	180  º C
30UH	1080-1130	(10.8-11.3)	≥  812	(  ≥  10.2)	≥  1990	(  ≥  25)	223-247	(28-31)	180  º C
33UH	1130-1170	(11.3-11.7)	≥  852	(  ≥  10.7)	≥  1990	(  ≥  25)	247-271	(31-34)	180  º C
35UH	1180-1220	(11.8-12.2)	≥  860	(  ≥  10.8)	≥  1990	(  ≥  25)	263-287	(33-36)	180  º C
38UH	1220-1250	(12.2-12.5)	≥  876	(  ≥  11.0)	≥  1990	(  ≥  25)	287-310	(36-39)	180  º C
40UH	1240-1280	(12.5-12.8)	≥  899	(  ≥  11.3)	≥  1990	(  ≥  25)	302-326	(38-41)	180  º C
28EH	1040-1090	(10.4-10.9)	≥  780	(  ≥  9.8)	≥  2388	(  ≥  30)	207-231	(26-29)	200  º C
30EH	1080-1130	(10.8-11.3)	≥  812	(  ≥  10.2)	≥  2388	(  ≥  30)	223-247	(28-31)	200  º C
33EH	1130-1170	(11.3-11.7)	≥  836	(  ≥  10.5)	≥  2388	(  ≥  30)	247-271	(31-34)	200  º C
35EH	1170-1220	(11.7-12.2)	≥  876	(  ≥  11.0)	≥  2388	(  ≥  30)	263-287	(33-36)	200  º C
38EH	1220-1250	(12.2-12.5)	≥  899	(  ≥  11.3)	≥  2388	(  ≥  30)	287-310	(36-39)	200  º C
28AH	1040-1090	(10.4-10.9)	≥  787	(  ≥  9.9)	≥  2624	(  ≥  33)	207-231	(26-29)	230  º C
30AH	1080-1130	(10.8-11.3)	≥  819	(  ≥  10.3)	≥  2624	(  ≥  33)	223-247	(28-31)	230  º C
33AH	1130-1170	(11.3-11.7)	≥  843	(  ≥  10.6)	≥  2624	(  ≥  33)	247-271	(31-34)	230  º C