Alnico magnets
  • What's your MOQ?

  • We have no strict MOQ, if we can do, we will try our best to cooperate.

  • What information do I need to supply when I have a inquiry?

  • Kindly offer us your requirements about magnet grade,  size, quantity, coating, magnetic direction, work tempreture ect.. A drawing is needed for arc shape magnets. Then best price will be offered during 24 hours.

  • Could you send me product sample before I place an order?

  • Yes, we could offer the sample for free charge if we have magnets stock.

  • What is your terms of payment?

  • For new customers we suggest T/T (30% deposit in advance, balance before shipment.).And for our loyal business partners we're open to more flexible terms such as OA, L/C, D/P etc.

  • How long is your lead time?

  • Generally it is 5-10 days if the goods or materials are in stock, or it is 20-25 days for new production,it is according to the order quantity.

  • How can you guarantee the quality of my magnet orders?

  • At BearHeart we have a QC team of 12 years' experience taking care of every magnet in the production line; Full inspection can be arranged through specialized quipment&strict processing; Further more our Shipping Dept will be paying close attention on every single shipment out of our warehouse. There's be nonthing you should worry about once you start business with BearHeart!

  • Is that possible to get custom magnets and how long it takes?

  • Yes, we can provide custom magnets as your requirements, but some fees will be charged accordingly due to high cost in mold of manufacturing and tooling fees.

  • What are strongest magnets?

  • In the mid-1980s, neodymium (also called rare earth) magnets started to become available. Compared to other available magnets, neodymium magnets are the strongest permanent magnets available.

  • Why is neodymium so magnetic?

  • Neodymium magnets are considered strong because they resist demagnetization and have a high saturation magnetization. ... Ferromagnetic materials like neodymium magnets are composed of microscopic regions called magnetic domains that align in the same direction when exposed to an external magnetic field.

  • Can you cut Neodymium magnets?

  • Magnets are sintered and are therefore extremely hard and brittle. You should never attempt to cut or drill into a magnet unless using diamond tooling and coolant as the dust can be highly flammable.

  • Can you weld Neodymium magnets?

  • You definitely cannot solder or weld to neodymium magnets.

  • How are neodymium magnets made?

  • Sintered Nd-magnets are prepared by the raw materials being melted in a furnace, cast into a mold and cooled to form ingots. The ingots are pulverized and milled; the powder is then sintered into dense blocks. The blocks are then heat-treated, cut to shape, surface treated and magnetized.

  • Where is Neodymium magnets used?

  • Neodymium magnets are used in numerous applications requiring strong, compact permanent magnets, such as electric motors for cordless tools, hard disk drives, magnetic holddowns, and jewelry clasps.

  • What are neodymium magnets coated with?

  • The typical coating for a neodymium magnet is a layer of nickel followed by a layer of copper and then nickel again. However there are many different coatings used with neodymium magnets including gold, rubber and Polytetrafluoroethylene (PTFE).

  • How long does it take for the magnetism to lose its strength?

  • If magnets are heated above 80-100 degrees C they will start to lose their magnetism. Theory suggest these permanent magnets would  lose around 1-5% over 10 years however this depends on many variables. Once lost, the magnetism does not return and cannot be remagnetised.

  • Are larger magnets stronger?

  • Size is just one of the ways one can change the strength of a magnet. However, it can get very difficult and expensive to simply make a magnet bigger. ... By reducing the electrical resistance, much higher amounts of electrical current can be put through the magnets, thereby generating a much stronger magnetic force.

  • Why do magnets lose their magnetism when dropped?

  • Permanent magnets can lose their magnetism if they are dropped or banged on enough to bump their domains out of alignment. ... The reason that would be hard to bump a piece of iron and make it magnetic is because of the way vibrations propagate in the material.

  • What is magnet pull strength?

  • One method of determining the strength of a magnet is through pull strength. Pull strength is a reliable method of measuring the maximum strength, or holding power, that a magnet has before it is separated from ferrous material. It is measured in pounds or kilograms.

  • How is magnet strength measured?

  • The intensity of a magnetic field, measured in Gauss or Teslas (10,000 Gauss = 1 Tesla), is also a common measurement of a magnets strength as this is a representation of the density of a magnetic field produced by a magnet, known as flux density.

  • What happens if you cut a magnet in half?

  • You can think of a magnet as a bundle of tiny magnets, called magnetic domains, that are jammed together. Each one reinforces the magnetic fields of the others. Each one has a tiny north and south pole. If you cut one in half, the newly cut faces will become the new north or south poles of the smaller pieces.

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