0769-23388351
Toggle Navigation
Many air conditioner fans, EC fans, and brushless fans now use a type of magnet called an “injection-molded magnetic ring.” These are becoming increasingly common, especially in indoor and outdoor fans. So, what exactly is an injection-molded magnetic ring for fans? What are the common specifications and pole counts?
Simply put, an injection-molded magnetic ring for fans is a ring-shaped magnet. It is produced by mixing magnetic powder with plastic material, directly injection-molding it through a mold, and then magnetizing it with multiple poles. The most common type is the injection-molded ferrite magnetic ring. Additionally, there are injection-molded neodymium-iron-boron magnetic rings, which offer superior magnetic performance.
As for why injection-molded materials are so widely chosen, it is mainly because they are relatively inexpensive, wear-resistant, shatter-resistant, and easy to magnetize with multiple poles.
Radial multipole injection-molded ferrite rotor magnets
Regarding the number of poles, 8-pole configurations are currently the most common in EC fans and brushless fans.
There are countless specifications for magnetic rings, and no standard size. The outer diameter generally ranges from 20 to 55 mm, with an inner diameter of around 8 mm being the most common, and a height typically between 10 and 25 mm.
Many fan manufacturers now opt for off-the-shelf specifications. Given the high volume of demand in the fan industry, if specifications are similar, they can often simply adjust the dimensions or share molds, which saves a significant amount on tooling costs and speeds up the development cycle.
Related product selections;
Fan Motor Magnet Rotor Assembly Overmolding 10 poles
Radial 8 pole magnetized injection molding ferrite magnet ring 1480gs
This is a radial 2 pole circular magnet designed specifically for magnetic encoder chips. It is made of sintered neodymium-iron-boron with N35 grade performance and is suitable for standard environments....
This product is a multi pole magnetic ring with an inner diameter of 1.5mm. The material is injection molded ferrite. It adopts axial multi pole magnetization and is mainly used for DC motors. If you have a sample of similar injection molded magnetic products, please contact us for quotation....
This is a very small size rectangular block magnet with galvanized surface, 3mm length, 1.5mm width and height, with very fine tolerance, magnetized by lengthwise direction, mainly used in precision electronics, instrumentation, please contact us if you need to buy....
Need 20-pole ring magnets? Welcome to contact NST. Our company has many stock sizes. The sintered ferrite magnetic ring uploaded today has an outer diameter of 30.8mm, a hole of 21.3mm, and a thickness of 5mm....
This product is a 1mm 6-sided magnet, made of rare earth neodymium magnet, N52 grade, the surface coating is gold, very beautiful, the width is 6mmmm, the thickness is 1mm, and the thickness is magnetized. If you are interested in this small-sized polygonal magnet You can contact the courage magnet manufacturer to quote and customize for you....
You need to buy small magnets with holes. Welcome to the Courage Magnet Factory in China. We can customize small magnets with through holes (straight holes) or countersunk holes for you. You can choose NdFeB or other weak materials. The magnetic performance is generally above 3000 Gauss. If you need to know its price, please send us an inquiry, thank you!...
This sample is a magnet with a thickness of 12mm, the material is strong NdFeB magnet, the thickness is magnetized, and the surface is galvanized. You can also choose radial magnetization, depending on your needs, the specific size is 6mm in diameter, 12mm in height and thickness....
This product is a magnetic steel for the electric tricycle/bicycle handle governor, with an arc shaped shape and made of rare earth neodymium...