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Powerful N48 Od101.6X50.8 X 12.7mm Neodymium Ring Magnet

Name: Powerful N48 Od101.6X50.8 X 12.7mm Neodymium Ring Magnet
Brand: china-crystals.com
SKU: 774200595
Availability: InStock
Rating: 4.6 (31 reviews)

Price:	US $ 18.7-20.5/Piece
Trade Terms:	FOB,CFR,CIF
Min Order:	100/Piece
Pay Type:	L/C,T/T,Paypal,Western Union

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Product Specifications

Prod Model:	N48
Markets:	North America,South America,Eastern Europe,Southeast Asia,Africa,Oceania,Mid East,Eastern Asia,Western Europe
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
Application:	NdFeB Magnet
Shape:	Ring
Coating:	Nickel

Product Description

No Matter you buy 1 pcs or 100,000 pcs of magnets, you can not find better service elsewhere.

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.

GME can supply Samarium Cobalt Magnets with custom shapes and sizes, made-to-order Samarium Cobalt Magnets, or we can assist in developing a solution specifically for your application.

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

Samarium Cobatl magnets: good thermal stability, resistant to corrosion, resistant to demagnetization

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)	Max Working Temp. (TW)
		mT	Gs	KA/m	Oe	KA/n	Oe	KJ/m³	MGOe	g/cm³	%/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

Features include:
Samarium cobalt magnets are hard and brittle and may chip or break if dropped.
They have high magnetic properties
Samarium cobalt magnets offer good thermal stability
Samarium cobalt magnets are resistant to corrosion
Samarium cobalt magnets resistant to demagnetization

Advantages:

Extremely resistant to demagnetization
high temperature stability (max operating temperatures between 250 °C (523 K) and 550 °C (823 K); Curie temperatures from 700 °C (973 K) to 800 °C (1,070 K)
Expensive and subject to price fluctuations (cobalt is market price sensitive)

Disadvantages:

Samarium cobalt magnets can easily chip; eye protection must be worn when handling them.
Allowing magnets to snap together can cause the magnets to shatter, which can cause a potential hazard.
Samarium-cobalt is manufactured by a process called sintering, and as with all sintered materials, inherent cracks are very possible. These magnets do not have mechanical integrity; instead the magnet must be utilized for its magnetic functions and other mechanical systems must be designed to provide the mechanical reliability of the system.

Comparison between neodymium and samarium cobalt

Property	Neodymium	Sm-Co
Remanence (T)	1-1.3	0.82-1.16
Coercivity (MA/m)	0.875-1.99	0.493-1.59
Relative permeability	1.05	1.05
Temperature coefficient of remanence (%/K)	0.12	0.03
Temperature coefficient of coercivity (%/K)	0.55..-0.65	0.15..-0.30
Curie temperature (°C)	320	800
Density (g/cm³)	7.3-7.5	8.2-8.4
CTE, magnetizing direction (1/K)	5.2×10⁶	5.2×10⁶
CTE, normal to magnetizing direction (1/K)	0.8×10⁶	11×10⁶
Flexural strength (N/mm2)	250	150
Compressive strength (N/mm2)	1100	800
Tensile strength (N/mm2)	75	35
Vickers hardness (HV)	550-650	500-650
Electrical resistivity (Ω·cm)	(110-170)×10⁶	86×10⁶

Manufacturing Methods
SmCo magnets are manufactured in the following forms:
Sintered - fine SmCo powder is compacted in a die and then sintered, fusing the powder into a solid material. There are two forms of pressing: die pressing (which involves a hard die into which the powder is placed and then pressed), and isostatic pressing (involving a special "rubber" die into which powder is placed and then pressed with equal force in all directions on the powder). Die pressed parts are smaller than isostatically pressed parts. Although the magnetic properties of isostatically pressed parts are higher, the uniformity of magnetic characteristics is usually lower than that of die pressed parts. Sintered parts usually need some finish machining in order to meet final tolerances.

Compression Bonded - this is a technique whereby a special form of SmCo powder is blended with a plastic carrier material, die pressed and then heated. Parts made in this way can be of complex shapes and come off the tool with close tolerances, requiring no further finish machining. They have lower energy products than sintered materials - currently in the range of 15 MGOe.

For more information, please refer to www.greatmagtech.com

Company Profile

In addition to high performance permanent magnets, GME is the leading global supplier of magnets and magnetic solutions for industrial, research and engineering applications, and strives to be the Great service leading provider worldwide.

Founded in 2000, GME was formed to advance development of magnet technology as an OEM wholesale supplier of permanent magnets and magnetic products. By interacting closely with its customers and focusing on a market-driven product line, GME has positioned itself to readily meet the challenges of today's dynamic global economy.

What sets us apart from our competitors are our excellent quality, reasonable prices and great service. With testing laboratory which equipped with the state-of-the-art measuring and testing devices, our QC dept. Ensures ongoing development and maintenance of high quality standards and guarantees full compliance with customer requirements and all applicable regulations.

We approach each project with enthusiasm and a commitment to reaching the best solution. We are a growing business, and we are striving to be the best. You will appreciate it in the products and great service we supply.

President's Letter

Since its establishment, over 15 years ago, GME has paid much attention to technological innovation and personnel training, and constantly on magnets and magnetic technology optimization and development. Through the years, GME has specialized in magnets and magnetic solutions for all industries and applications - from NdFeB magnets, SmCo magnets to magnetic assemblies, through aerospace fields to household appliances ensuring steady flow and use of green energy.

GME intend to be best of the best in service excellence among all companies worldwide. Great service is more than what we provide, it's how we think and act. It's not just "one-stop magnetic solution" or supplying excellent magnets, it's the prompt response to a request, the "smile" in the voice on the phone and the drive to always exceed your expectation. It's how we work with one another and how we work with our customers and the public society. By doing our jobs well, we help our concerned partners do their jobs well.

Our culture is rooted in GME core values "Customer Care, Innovation, Co-Prosperity, Social Responsibility". These values are the pillars of our business that guide our work behavior.

Corporate Culture

GME Vision

To be best of the best in great service among all companies worldwide.

GME Mission

Take every action to ensure high quality, think and act before customer perspective, exceed customer expectations

GME Spirit

Be sincere and reliable, Be responsible and professional, Practice teamwork, Achieve excellence

GME core values

Customer Care

Quality is our life. Customer satisfaction is our eternal pursuit. Everything we do at GME is driven by an unyielding passion for excellence in identifying and delivering solutions that exceed expectations.

Innovation

In today's fast-developing global economy, innovation is critical to a company's survival. Our heritage inspires us to keep innovative thinking all the time for continuous improvement.

Co-Prosperity

A business cannot be successful unless it creates prosperity and opportunity for others. We have a dream--customers could win more through our Great Service; We have a dream-all GME people could realize their own dreams while striving for GME Dream.

Social Responsibility

Sustainability isn't only important for people and the planet, but also is vital for business success. We are environmentally responsible and drive to sustainability. And we actively support the communities and make contribution to society in which we do business.