Small strong cylinder neodymium magnet motor manufacturer

Specifications 1) Small strong cylinder neodymium magnet motor manufacturer

2) customized size & accurate tolerance

3) fast and safe deliver

1) customized magnets 2) customized size & accurate tolerance
3) fast and safe delivery & excellent service   Properties of Selected Magnetics Materials
This chart presents some of the magnetic properties of a subset of magnetic materials:

	Maxium Energy Product Bhmax(MGOe)	Residual FluxDensity Br(G)	Coercive Force Hc(Koe)	Working Temperature  °c
Ceramic 5	3.4	3950	2400	400
Sintered Alnico5	3.9	10900	620	540
Cast Alnico 8	5.3	8200	1650	540
Samarium Cobalt 20(1.5)	20	9000	8000	260
Samarium Cobalt 28 (2,17)	28	10500	9500	350
Neodymium N45	45	13500	10800	80
Neodymium 33UH	33	11500	10700	180

    Warnings: Neodymium magnets attract each other with almost twice the force that they use to attract steel objects.They also attract each other through very large distances, even small magnets will attract each other through the thickness of your finger!    About NdFeB magnet:   Neodymium iron boron ( NdFeB) is a type of rare earth magnetic material. 
NdFeB is the most advanced commercialized permanent magnet material available today. This material has similar properties as the samarium cobalt except that it is more easily oxidized and generally doesn't have the same temperature resistance.
However, NdFeB magnets have the highest energy products approaching 52MGOe and are mechanically stronger than samarium cobalt magents. NdFeB material is more costly by weight than ceramic or alnico but produces the highest amount of flux per unit of volume or mass amking it very economical for many applicantions. Their high energy products lend themselves to comnpact designs that result in innovative applications and lower manufacturing costs.
Unprotected NdFeB magnets are subject to corronsion. Surface treatments has ben developed that allow them to be used in most applications. These treatments include copper, silver,, gold, nickel, zinc and tin plating and epoxy resin coating.
Beneficial characteristics of NdFeB magnets include their very high energy product, very high coercive force, and moderate temperature stability. Drawbacks include lower mechanical strength, and low corrosion resistance when not properly coated or plated.   Magnetic Grades and Temperature:   The Grade of a magent directly refers to the Maximum Energy Product of the material that composes the magnet. It in no way refers to the physical properties of the magnet. Grade is generally used to describe how "strong" a permanent magnet material is. The energy products is specified in the unites Gauss Oersted. One MGOe is 1,000,000 Gauss Obersted. A grade forty (N40) would have a Maximum Energy Product of 40 MGOe.The higher the grade the "stronger" the magnet.  Magnetic materials have a wide range of working temperatures. The following chart the various materials and their maximum working temperature. NdFeB material
comes in many different heat tolerances but as the heat tolerance increases the maximum available fulx density decreases:  

Description	Magnet
Material:	NdFeB magnet

Woking Temperature	Grade	Max.Operating Temperature
	N35-N52	80°c
	33M-48M	100°c
	33H-48H	120°c
	30SH-45SH	150°c
	30UH-40UH	180°c
	28EH-38EH	200°c
	28AH-35AH	220°c

 

Surface	Coating	Thinkness(Microns)	Color	Resistance
Passivation		1	silver grey	Temporary Protection
Nickel	Ni+Ni	10-20	bright silver	excellent against humidity
	Ni+Cu+Ni
Zinc	Zn	8-20	bright blue	good against salt spray
	C-Zn		shinny color	excellent against salt spray
Tin	Ni+Cu+SN	15-20	silver	Superior Against Humidity
Gold	Ni+Cu+AU	10-20	gold	superior against humidity
Copper	Ni+Cu	10-20	gold	Temporary protection
Epoxy	epoxy	15-25	black, red, grey	excellent against humidity and salt spray
	Ni+Cu+epoxy
	Zn+epoxy
Chemical	Ni	10-20	Silver grey	excellent against humidity
Parylene	parylene	5-20	grey	excellent against humidity, salt spray, superior against solvents, gases, fungi and bacteria

Magnetic Orientations
Magnets can be delivered magnnetized and un-magnetized. Many automated production methods rely on the magnets being incorporated into assemblies in a un-magnetized state and later magnetized once the assembly is completed. 
A magnet can be magnetized in a variety of directions. The diagrams below depict various magnetic orientations available for magnets. Anisotropic materials must be magnetically oriented during the production of material. They therefore  are inclined to a fixed orientation.
The radial orientations below are difficlut to produce and currently only available in some isotropic materials.     Applications
Magnets are prevasive in the moden environment. From the humblue refrigerator magnet to the Hubble space Telescope, magnets impact almost every aspect of our lives. Magnets are part of most everyday electronic devices. You'll find magnets in almost every device with an electronic motor. Televisions, computers, autombiles, loud speakers, cell phones, and microwave ovens, all use magnets. Magnets are used to keep kitchen cabinet doors closed, are part of the sensors in home alarm systems, are palced  in cows stomachs to catch barbed wire and nails, are used in magnetic resonance imaging systems, are used to slow elevators, roller coasters and subways, and in ountless other devices. Because of the broad used of magents it is difficlut to provide a definitive list of all other applications. However, the bulk of magnets manufactured today are used primarily in holding applications and electro-motive applications.     Contact us: Please do no hesitate to contact with us if you have any questions or requests on magnet.
You can inquiry either by email/fax or instant message
We are pleased to offer your service and respond within 12 hours Sales manager:   Mr. Vincent
Skype: infoskymagnet Tel:+86 574 88229326 Fax:+86 574 87687170 Relevant  Shipping Advantage: 
1) Appointed forwarder is welcome
2) We can ship by express, air & sea
3)  We have big discount on our won forwarder, and mainly world-wide express such as : DHL, UPS, Fedex