Basic Info

Certification: RoHS, ISO9001, SGS
Magnetocrystalline Anisotropy: Anisotropic Magnet
Shape: Ring Magnet
Specification: ISO9001, SGS, RoHS, D13xD9x4
Trademark: sensmag
Origin: Dongyang, China
Type: Permanent
Application: Speaker Magnet, Industrial Magnet, Solenoid, Motor Magnet
Delivery Date: 15 Days
Tolerance: Customized
Transport Package: Paper Carton+ Wooden Case
HS Code: 8505110030

Product Description

Ceramic (Ferrite) Permanent Magnets
Are composed of strontium carbonate and iron oxide. They are charcoal gray in color and usually appear in forms of blocks, discs, rings, cylinders and sometimes arcs for motors.

Applications of Ceramic Magnets:

High intrinsic coercive force
Tooling is expensive
Least expensive material compared to alnico and rare earth magnets
Limited to simple shapes due to manufacturing process than rare earth
Finishing requires diamond cutting or grinding wheel
Lower energy product than alnico and rare earth magnets
Most common grades of ceramic are 1, 5, and 8 (1-8 are possible)
Grade 8 is the strongest ceramic material available
Applications of Ceramic Magnet:
Speaker magnets, DC brushless motors, Magnetic Resonance Imaging (MRI), Magnetos used on lawnmowers and outboard motors, DC permanent magnet motors (used in cars), Separators (separate ferrous material from non-ferrous), Magnetic assemblies designed for lifting, holding, retrieving and separating.

Tolerances:

For a pressed material, tolerance on the thickness (direction of magnetization) is ¡À .005. Other dimensions are ¡À 2.5% or ¡À .010, whichever is greater. According to IMA standards, visual imperfections such as hairline cracks, porosity and minor chips are commonly found in sintered metallic magnets. A chipped edge is considered acceptable if no more than 10% of the surface is missing. Cracks are acceptable as long as they do not extend across more than 50% of pole surface.

Magnetizing and Handling:

Ceramic magnet material is extremely brittle and can chip or break if dropped on a hard surface or if allowed to "jump at" and attracting object. Handle with care. The weakest grade of ceramic material is grade 1, which is typically non-oriented. Grade 5 and 8 are oriented ceramic material. Grade 8 is the strongest ceramic magnet material available. When making magnetic assemblies with ceramic, it is typically easier for production purposes to magnetize the product after 

About us:
SensMag Inc. is one professional manufacturer of permanent magnets. With an experienced team, SensMag is more specialized in producing various kinds of permanent magnets, including Sintered & Bonded NdFeB, Cast & Sintered AlNiCo, SmCo, Ceramic Magnets and Magnetic Assemblies.
Our products are widely used in motors, brakes, couplings, offices, teaching, automotive instruments, medical equipments, and wind-power generation, aerospace and military industries.   

Our advantages:

1. Over 20 years in manufacturing magnets, our people are specialized in drawing reading, machining, heat treatment, testing and packing.
2. Our 90% products are exported to European and U.S. market. We are focusing on controlling quality, solving problems and selecting magnet materials.
3. We have many finished or half-finished products in our stock. It can help you to get the magnets in shorter time.
4. We are located in Hangzhou, near to the Shanghai air port and sea port. It is very convenient for delivery. 

FAQ:

1: How long will you give me the reply?
We will contact you within 4 hours as soon as we can.
2: Could I get a sample?
Yes, we are willing to provide our customers new samples.
3: How about the quality of the magnets?
We have the certification of ISO and ROSH.
4: How is the price?
As we insist on the quality is the most important, we will provide the best quality of magnets, but not the lowest price, and we can do our best to quote you a reasonable price.
5: Could you provide me the shortest lead time?
We have half finished or materials in our stock, if you really need urgently, we will try our best to satisfy you.