Powerful N48 Neodymium Ring Magnet

• Customization: Available
• Composite: Samarium Cobalt Magnets
• Type: Sm2Co17
• Model NO.: N48
• Application: Speaker Magnet, Industrial Magnet, Jewelry Magnet, Solenoid, Motor Magnet, NdFeB Magnet
• Shape: Ring
• Coating: Nickel
• Product Name of Magnet: Powerful N48 Od101.6X50.8 X 12.7mm Neodymium Ring
• Envrionment Management System: ISO9001/14001
• Certificate of Magnet: CE/RoHS/SGS
• Tolerance of Magnet: +/- 0.05mm
• Magnetization Direction of Magne: Axial/Radial/Multi-Poles Magnetization
• Working Temp. of Magnet: 80 C
• Transportation of Magnet: by Sea, by Air, by Express
• Lead Time of Magnet: 7-25days
• Packing of Magnet: Anti-Magnetizing Iron Box & Carton
• Payment: T/T, Paypal, Western Union
• Transport Package: Carton, Anti-Magnetizing Packing, Pallet
• Specification: Customized made
• Trademark: GME Ndfeb Magnet
• Origin: Zhejiang Ningbo/ Fujian Xiamen
• HS Code: 850511100
• Production Capacity: 3000 Tons

Product Description

Samarium Cobalt magnets, also known as rare earth magnets, offer the best value when comparing performance and size in high temperature or adverse environments.

Samarium Cobalt magnets are higher in cost, specially ring samarium cobalt ring magnet, but magnetically very strong and typically allow for dimensional reductions with higher precision.

powerful N48 OD101.6x50.8 x 12.7mm neodymium ring magnet

Diameter:	OD 4"
Diameter:	ID 2"
Height:	1/2"
Magnetization:	Through Thickness
Plating/Coating	Nickel (Ni)
Rally:	47.5pounds
Grade	N48
Br	13.6-14.2KG
Hcb	≥10.5KOe
Hci	≥11KOe
BHmax	45-48 MGOe
Tmax	80C / 176F
MOQ	100pcs
Leading Time	18-23 working days
Sample	Yes
Certificate	ISO2000, TS16949, RoHS, CE & SGS
Payment	T/T, PayPal, Western Union

A samarium-cobalt (SmCo) magnet, a type of rare earth magnet, is a strong permanent magnet made of an alloy of samarium and cobalt.
They are generally ranked similarly in strength to neodymium magnets, but have higher temperature ratings and higher coercivity.
samarium-cobalt (SmCo) magnets are brittle, and prone to cracking and chipping. Samarium-cobalt magnets have maximum energy products (BHmax) that range from 16 megagauss-oersteds (MGOe) to 33 MGOe, approx. 128 kJ/m3 to 264 kJ/m3; their theoretical limit is 34 MGOe, about 272 kJ/m3.
samarium-cobalt (SmCo) magnets are available in two "series", namely Series 1:5 and Series 2:17.
Sintered Samarium Cobalt magnets exhibit magnetic anisotropy, meaning they can only be magnetized in the axis of their magnetic orientation. This is done by aligning the crystal structure of the material during the manufacturing process.
 
Machining & Magnetization
Samarium Cobalt magnets offer strong resistance to demagnetization. All Samarium Cobalt magnets cannot be formed with conventional drilling, turning or milling processes, and must be ground before they are magnetized. Additionally, large or complex assemblies are usually magnetized prior to assembly. Standard tolerances for Samarium Cobalt magnets are +/-.005 for ground dimensions.
1:5 alloy material
1:5 offers 16 MGOe (energy product) to 22 MGOe and is made up of approximately 50% samarium and 50% cobalt. The 1:5 series has a maximum recommended operating temperature of 250°C. SmCo 1:5 magnets require lower field strengths than 2:17 materials to magnetize. In some instances, 1:5  material may be magnetized with multiple poles, provided that a magnetizing fixture is available.
2:17 alloy material
2:17 offers 24 MGOe to 32 MGOe and is composed of about 25% samarium, 5% copper, 18% iron, 2% hafnium or zirconium, with the remainder being cobalt. The 2:17 series has a maximum operating temperature of 350°C. Special grades of 2:17 are available which can operate to even higher temperatures. SmCo 2:17 requires a higher magnetizing field than alloy 1:5 does, and multiple pole magnetization is sometimes possible, provided that a magnetizing fixture is available.
Performance for samarium cobalt magnets:

Material	Grade	Remannence		Coercive Force		Instrinsic Coercive		Max Energy		Density	Temp Coefficient	Temp Coefficient	Cuire Temp	Max Working Temp. (TW)
		(Br)		(Hcj)		(Hcb)		(BHmax)		(D)	(Near Br)	(Near Hcj)	(TC)
		mT	Gs	KA/m	Oe	KA/n	Oe	KJ/m^3	MGOe	g/cm^3	%/K	%/K	ºC	ºC
SmCo 1:5	SmCo18	840	8400	605	7600	1432	18000	143	18	8.1	-0.04	-0.3	750	250
(SmPr)CO5	SmCo20	890	8900	637	8000	1432	18000	159	20	8.2	-0.04	-0.3	750	250
	SmCo22	930	9300	637	8000	1432	18000	175	22	8.2	-0.04	-0.3	750	250
	LTc(HM-10)	590	630	493	6200	1430	1830	80	10	8.2	Temp Range	%ºC	700	250
1:5											20-100ºC	-0.004
(SmGd)CO5											100-200ºC	-0.021
											200-300ºC	-0.042
	SmCo24	980	9800	676	8500	1432	18000	191	24	8.3	-0.03	-0.2	800	280
	SmCo24H	980	9800	676	8500	1989	25000	191	24	8.3	-0.03	-0.2	800	280
	SmCo26L	1030	10300	398	5000	438	5500	207	26	8.3	-0.03	-0.2	800	300
	SmCo26	1030	10300	716	9000	1194	15000	207	26	8.3	-0.03	-0.2	800	300
2:17 Sm2	SmCo26M	1030	10300	716	9000	1592	20000	207	26	8.3	-0.03	-0.2	800	300
(CoFeCUZr)17	SmCo26H	1030	10300	716	9000	1989	25000	207	26	8.3	-0.03	-0.2	800	350
	SmCo28	1070	10700	756	9500	1194	15000	223	28	8.3	-0.03	-0.2	800	350
	SmCo28M	1070	10700	756	9500	1592	20000	223	28	8.3	-0.03	-0.2	800	350
	SmCo30	1100	11000	772	9700	1194	15000	239	30	8.3	-0.03	-0.2	800	350
	SmCo30M	1100	11000	772	9700	1592	20000	239	30	8.3	-0.03	-0.2	800	350
	LTc(HMG-22)	980	9800	715	9000	1500	20000	230	23	8.3	Temp Range	%ºC	840	300
2:17											-50-25ºC	0.005
(SmEr)2(CoTM)17											20-100ºC	0.012
											100-200ºC	0.006
											200-300ºC	-0.025