Sintered NdFeB Permanent Ring Shape N42 Neodymium Magnets

• Application: Industrial Magnet
• Shape: Block
• Coating: Nickel
• Certification: ISO9001:2008, ISO/Ts16949:2009, RoHS
• Composite: Rare Earth Magnets
• Type: Permanent Magnets
• Model NO.: SDMN
• Transport Package: Sea Pallet / Air Carton / Express Packaging
• Specification: RoHS
• Trademark: SDM
• Origin: China (Mainland)
• HS Code: 8505111000
• Production Capacity: 200000 Piece/Pieces Per Month

Product Description

Sintered NdFeB Permanent Ring Shape N42 Neodymium Magnets
 

Neodymium magnets are manufactured on the basis of Nd-Fe-B alloys and sintered Neodymium magnets have the highest (BH)max value among all of commercially available permanent magnets. Neodymium ring magnets are circular in shape with a concentric hole inside it. Magnet ring can be divided to pure ring or countersunk ring based on the detailed shape of the inner hole. Neodymium ring magnet should be measured by outer diameter (O.D.), inner diameter (I.D.), and thickness (T). Similar to Neodymium disc magnet, ring shaped magnet can be magnetized with its N pole and S pole opposite flat end surfaces or diametrically magnetized so as to the N pole is on one curved side and the S pole is on opposite curved side. Besides the conventional axial magnetized or diametrically magnetized magnets, radially oriented ring magnet is also available in SDM. In addition, Neodymium magnets are easily corrode under humid condition and are necessary to cover with a protective coating.



1. Coatings of Neodymium Magnets


2. Magnetic Properties of Sintered Neodymium Magnet

Sintered NdFeB Magnet
Grade	Residual Induction  (Br)		Coercive Force (Hcb)		Intrinsic Coercive Force (Hcj)		Max Energy Product (BH)max		Max Working Temp.
	T	kGs	kA/m	kOe	kA/m	kOe	Kj/m³	MGOe	(°C)
N35	1.17-1.22	11.7-12.2	≥868	≥10.9	≥955	≥12	263-287	33-36	80
N38	1.22-1.25	12.2-12.5	≥899	≥11.3	≥955	≥12	287-310	36-39	80
N40	1.25-1.28	12.5-12.8	≥907	≥11.4	≥955	≥12	302-326	38-41	80
N42	1.28-1.32	12.8-13.2	≥915	≥11.5	≥955	≥12	318-342	40-43	80
N45	1.32-1.38	13.2-13.8	≥923	≥11.6	≥955	≥12	342-366	43-46	80
N48	1.38-1.42	13.8-14.2	≥923	≥11.6	≥955	≥12	366-390	46-49	80
N50	1.40-1.45	14.0-14.5	≥796	≥10	≥876	≥11	374-406	47-51	60
N52	1.43-1.48	14.3-14.8	≥796	≥10	≥876	≥11	390-422	49-53	60
N35M	1.17-1.22	11.7-12.2	≥868	≥10.9	≥1114	≥14	263-287	33-36	100
N38M	1.22-1.25	12.2-12.5	≥899	≥11.3	≥1114	≥14	287-310	36-39	100
N40M	1.25-1.28	12.5-12.8	≥923	≥11.6	≥1114	≥14	302-326	38-41	100
N42M	1.28-1.32	12.8-13.2	≥955	≥12	≥1114	≥14	318-342	40-43	100
N45M	1.32-1.38	13.2-13.8	≥955	≥12.5	≥1114	≥14	342-366	43-46	100
N48M	1.37-1.43	13.7-14.3	≥1027	≥12.9	≥1114	≥14	366-390	46-49	100
N50M	1.40-1.45	14.0-14.5	≥1033	≥13	≥1114	≥14	382-406	48-51	100
N35H	1.17-1.22	11.7-12.2	≥868	≥10.9	≥1353	≥17	263-287	33-36	120
N38H	1.22-1.25	12.2-12.5	≥899	≥11.3	≥1353	≥ 17	287-310	36-39	120
N40H	1.25-1.28	12.5-12.8	≥923	≥11.6	≥1353	≥17	302-326	38-41	120
N42H	1.28-1.32	12.8-13.2	≥955	≥12	≥1353	≥17	318-342	40-43	120
N45H	1.32-1.36	13.2-13.6	≥963	≥12.1	≥1353	≥ 17	326-358	43-46	120
N48H	1.37-1.43	13.7-14.3	≥995	≥12.5	≥1353	≥17	366-390	46-49	120
N35SH	1.17-1.22	11.7-12.2	≥876	≥11	≥1592	≥20	263-287	33-36	150
N38SH	1.22-1.25	12.2-12.5	≥907	≥11.4	≥1592	≥20	287-310	36-39	150
N40SH	1.25-1.28	12.5-12.8	≥939	≥11.8	≥1592	≥20	302-326	38-41	150
N42SH	1.28-1.32	12.8-13.2	≥987	≥12.4	≥1592	≥20	318-342	40-43	150
N45SH	1.32-1.38	13.2-13.8	≥1003	≥12.6	≥1592	≥20	342-366	43-46	150
N28UH	1.04-108	10.4-10.8	≥764	≥9.6	≥1990	≥25	207-231	26-29	180
N30UH	1.08-1.13	10.8-11.3	≥812	≥10.2	≥1990	≥25	223-247	28-31	180
N33UH	1.13-1.17	11.3-11.7	≥852	≥10.7	≥1990	≥25	247-271	31-34	180
N35UH	1.17-1.22	11.7-12.2	≥860	≥10.8	≥1990	≥25	263-287	33-36	180
N38UH	1.22-1.25	12.2-12.5	≥876	≥11	≥1990	≥25	287-310	36-39	180
N40UH	1.25-1.28	12.5-12.8	≥899	≥11.3	≥1990	≥25	302-326	38-41	180
N42UH	1.28-1.32	12.8-13.2	≥899	≥11.3	≥1990	≥25	318-342	40-43	180
N28EH	1.04-1.08	10.4-10.8	≥780	≥9.8	≥2388	≥30	207-231	26-29	200
N30EH	1.08-1.13	10.8-11.3	≥812	≥10.2	≥2388	≥30	223-247	28-31	200
N33EH	1.13-1.17	11.3-11.7	≥836	≥10.5	≥2388	≥30	247-271	31-34	200
N35EH	1.17-1.22	11.7-12.2	≥876	≥11	≥2388	≥30	263-287	33-36	200
N38EH	1.22-1.25	12.2-12.5	≥899	≥11.3	≥2388	≥30	287-310	36-39	200
N40EH	1.25-1.28	12.5-12.8	≥899	≥11.3	≥2388	≥30	302-326	38-41	200
N28AH	1.04-1.08	10.4-10.8	≥787	≥9.9	≥2624	≥33	207-231	26-29	230
N30AH	1.08-1.13	10.8-11.3	≥819	≥10.3	≥2624	≥33	223-247	28-31	230
N33AH	1.13-1.17	11.3-11.7	≥843	≥10.6	≥2624	≥33	247-271	31-34	230
N35AH	1.17-1.22	11.7-12.2	≥876	≥11	≥2624	≥33	263-287	33-36	230
N38AH	1.22-1.25	12.2-12.5	≥899	≥11.3	≥2624	≥33	287-310	36-39	230

3.Manufacturing Process of Sintered Neodymium Magnet

4. Magnetization Direction Of Arc Magnet

5. Machining Process of Neodymium Countersunk Magnet

It is hard for sintered Neodymium magnet to directly achieve required shape and dimensional accuracy at one time due to the technical limitations of magnetic field orientation molding process, then machining process of Neodymium magnet blank is unavoidable. As a typical cermet material, sintered Neodymium magnet is considerable hard and brittle, therefore, there are merely cutting, drilling, and grinding can be served for its machining process among conventional machining technology. 4mm is commonly treated as the critical dimension of ring magnet's inner hole. It is necessary to select trepanning process when inner hole larger than 4mm. As the by-product in trepanning process, trepanned core can be utilized to manufacture other suitable magnet and thus significantly enhance material utilization ratio.

FAQ

1: How long will you give me the reply?
We will contact you in 12 hours as soon as we can.

2: Could I get samples?
Yes, we have materials in stock to help you to get the samples as soon as we can.

3: How about the quality of the magnets?
We have the certification of ISO, TS and ROSH, we could send the certification test of our company to you.

4: How is the price?
As we believe the quality is the most important, we will provide the best quality magnet we can with reasonable price.

5: Could you provide me the shortest lead time?
We have materials in our stock, if you really need, you can tell us and we will try our best to satisfy you.

6: Could I visit your factory?
Of course, if you need we will help you to visit our factory.

7: If I have paid, when will you help me to produce?
When we have received the money in our account, we will give you the receipt and arrange to produce immediately.