Tube Neodymium Micro Magnet, Sintered Neodymium Iron Boron Ring Micro Tiny Magnets
Specifications:
Materials
NdFeB, Grade: N30-N55, N30M- 52M, N30H-52H, N30SH-48SH, 30UH-42UH, 28EH-40EH, N28AH-35AH
Shape
Ring, Customized shapes for Neodymium Magnets are available.
Dimensions
Radius: 9.8mm
Width: 2.54mm
Thickness: 4.68mm
Accept Customized
Tolerances
Radius: -0.04 to +0.04mm
Width: -0.1 to +0.06mm
Thickness: -0.03 to +0.03mm
Accept Customized
Coating
Zinc, Customized coating are available. other: Ni-Cu-Ni, Nickel, Zn, Gold, Silver, Copper, Epoxy, Chemical, PTFE, Parylene, Everlube, Passivation and more
Capacity
more than 1000K pieces/month
Application
voice coil motors
Introduction
Neodymium Magnets are widely used in many fields, such as motors, sensors,microphones, wind turbines, wind generators, VCMs in hard disk drives, printer,switchboard, loudspeakers, magnetic separation, magnetic hooks, magnetic holder,magnetic chuck, common daily use, and so on.
All kinds of micro permanent magnet ring is widely used in watches, optical communication, medical, precision machinery and other industries. Thin wall long hole features Micro NdFeB Ring is my company’s products, inner hole length to diameter ratio can reach those days, products can be thin wall thickness to 0.2 mm. Production, quality stable and reliable, and has been supporting in many world famous companies products.
Product details | |||||
Project | Outer diameter（mm） | The inner diameter（mm） | highly（mm） | Direction of magnetization | Material |
Basic dimensions | φ0.8-φ10.0 | φ0.2-φ3.0 | 0.2-15 | Custom | SmCo, NdFeB, Ferrite, Alnico and etc. |
Tolerance | ±0.005-±0.05 | ±0.01-±0.1 | ±0.005-±0.05 | ±1° | |
Neodymium Micro Magnet – Neodymium-Iron-Boron magnets are sintered magnets composed of Neodymium, iron and bore powder. A nickel, zinc or epoxyd coating is necessary to protect this material against corrosion (due to agressive environment).
HOLDING FORCE
Magnetic force is optimal when the magnet is in contact with a mild steel frame, flat, clean and rather thick. It is lower with allied steels and cast iron (less 30% for cast iron).
It is lower in presence of an air gap (space between the part to magnetize and the polar face of the magnet).
It is decreasing by 0.22% every degree C by propitious circuits (see besides curve). neodymium ring micro magnets
INDUCTION ON SURFACE
The maximum value of induction in surface at 20°C is about 5000 Gauss for Neodymium Ferbore flat pot magnets. This value is decreasing by 0.22% every degree C when temperature is increasing.
MECHANICAL RESISTANCE
These ceramics are very fragile. They must be handled carefully. To avoid magnets attraction during handling we advise to put them on a mild steel plate. Do not shock or squeeze.
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