product name speaker ferrite magnets with ring  shape  

TOTAL QUALITY MANAGEMENT
 In order to meet customers' satisfaction and benefit all company members and the society, LG puts total quality management into practice strictly according to ISO/TS16949:2009 system, which obtains LG as Ningbo Export Products Quality Guarantee Enterprise.

PROFESSIONAL AND EFFICIENT MACHINING ABLITY
Ningbo LG has two machining subsidiary factories. They have inside diameter slicers, wire-cutting machines, flat grinding machines and centerless grinders, etc. The two factories have the ability to machine not only normal blocks, disks and segments, but also especially high precision small blocks and hyper-normal products, through using laser drilling and grinding to machine the SmCo products of thin-wall, deep hole, which has high precision as well as tiny hole. 

EXCELLENT GEOGRAPHICAL LOCATION
Ningbo LG is located in Ningbo, an important trading port, which is close to Shanghai and well-known as China's magnetic material production base for long time. This advantage guarantees us to provide customers with kinds of difficult-machining products. With the convenient transportation, LG could ensure you a short delivery time, even your urgent products needs.
Ningbo LG supplies customers home and abroad with kinds of shapes and grades of SmCo magnets with superior quality, competitive price, short lead time and considerate service. We sincerely welcome your visit, contact and negotiation. Ningbo LG Manufacturing Co., Ltd. will be your best partner for business.

INTRODUCTION TO TECHNICAL CONSULTANT
Dr. Hartmut Nagel, who has been technical consultant since the establishment of Ningbo LG. He engaged in the SmCo research work in a global professional material and technology group—ThyssenKrupp—in Germany. Now he establishes a company, which provides NdFeB and SmCo manufacturers with equipments like hydrogen-decrepitating furnaces, pressing machines, etc, as well as technical solutions and innovative services.

Ceramic, also known as ferrite, magnets are made of a composite of iron oxide and barium carbonate (BaCo3) or strontium carbonate (SrCO3). 
Widely available since the 1950's, this material is commonly available and at a lower cost than other types of materials used in permanet magnets.Ceramic magnets are made using pressing and sintering. Sintered magents are a type of ceramic composed of the compressed powder of the alloy material being used.Sintering involves the compaction of fine alloy powder in a die and then fusing the powder into a solid material with heat. While the sintered magets are solid ,their physical properties are more similar to a seramic and are easily broken and chipped.

Ceramic magents are brittle and hard generally requiriing diamond wheels to grind and shape.
These magnets come in a number of different grades. Ceramic-1 is an isotropic grade with equal magnetic properties in all directions.
Ceramic grades 5 and 8 are anisotropic grades. Ansotropic magents are magnetized in the direction of pressing.The anisotropic method delivers the highest energy product among ceramic magnets at values up to 3.5 MGOe ( Mega Gauss Oersted). Ceramic magnets have a good 
balance of magnetic strength, resistance to demagnetizing and economy. They are the most wide used magents today.

Beneficial characteristics of ceramic magnets include their low cost, high coercive force, resistance to corrosion, and high heat tolerance. Drawbacks include their low energy product or "strengh", low mechanical strengh, and the ferrite poweder on the surface of the material which can rub of and cause soiling.

Performance: Y30,Y30BH,Y35
Shape: Block, Cylinder, Rings,Customize;
Environmental;
High quality

We are a major manufacturer of Ferrite magnets. We custom make all kinds shapes of Ferrite magnets (block disc, ring, arc segment, or other special shapes)according to customers' requests, and all grades of Ferrite magnets, such as Y30,Y30BH,Y35.

The ferrite magnetshas the Features:
1) Made of Sro or Bao and Fe2O3 by ceramic processing technology;
2) 6 models available: Y10T, Y20, Y25, Y30, Y30BH, Y35, Y30H-1, Y30H-2, C5, C8;
3) Product styles available: Rings, discs, blocks and segments;
4) Widely used in machinery, audio/video and communication equipment. Transportation, energy, medical device, office automation, apparatus, auto mobile industry, motive power and safety.

Our magnets are widely used in pm motors and generators, communications, magnetic therapy, office automation, energy power and automobile industry. We also supply mgnetic suckers, holding magnets, magnetic hooks and magnetic clothing buttons.

Most of our magnets are exported to Europe, America and Asia.

• Ferrite or ceramic magnets are still the most widely used magnets with a maximum energy product of 1 to ± 4.3 MGOe. 

• Due to the environmental requirements which are becoming more stringent barium ferrite has been replaced by strontium ferrite during the last years. 

• Ferrite is the cheapest magnetic material and has a high corrosion resistance making coating unnecessary.

• This magnetic material is hard and fragile and must be processed with diamond, preferably when it is not in a magnetic state.

• Because it might shrink during the sinter process a tolerance of ± 2 % should be taken into account when determining the dimensions. If grinded ± 0.1 mm.

• Tighter tolerance is available on request. 

• Ferrite magnets can be supplied both isotropically and anisotropically, they are used in the most divergent products such as loudspeakers, magnetrons, measuring devices, toys, engines, reed contacts etc. 

• The maximum temperature of use is 225°C depending on the specification, dimensions and system design. 

• For specifications: See the table below. 

• The minimum dimension for block magnets is 2 x 2 x 2 mm, whereas the maximum dimension for this type is 270 x 90 x 25.4 mm.

• The minimum dimension for disc magnets is D 2 x 1 mm, whereas the maximum dimension for this type is D 156 x 25.

• The minimum dimension for ring magnets is D8 x 2.5 x 3 mm, whereas the maximum dimension for this type is D 256 x D* x 25 mm (* inside diameter in consultation

All of the N series neodymium Magent has a 8% DISCOUNT. 

Price is very competitive, any interest, pls feel  free to contact us.

 Contact person: Candy

eMail: candy@nb-lg.com

mobile: 0086-15967873267

 Tel: 0086- 0574-88193097

Fax: 0086-0574-88193259

skype:  lisinan117                     Welcome to inquiry!