Ring Neodymium Magnet
Neodymium bar magnets
Horizon supply Neodymium magnets in ring shaped. The ring magnets
are always used in industrial markets.
Neodymium magnets known as NdFeB, Neodymium-Iron-Boron, Neo, NIB or
Rare Earth Neodymium magnets, are the third generation of rare
earth permanent magnets. They offer the highest energy product of
any material today and are available in a very wide range of
shapes, sizes and grades. These qualities have made NdFeB magnets
preferable over the commonly used larger and less powerful Ferrite
Although the Curie temperature for NdFeB materials is 310-370ºC,
some irreversible loss of output may be expected at even moderate
temperatures. NdFeB magnets also have a moderately high reversible
temperature coefficient of Br which reduces total magnetic output
as temperature rises. Selection of NdFeB instead of SmCo, for
example, is a function of the maximum temperature of the
application, required magnetic output at typical use temperature
and total cost of the system. We are Ring Neodymium Magnet Factory .
However, they are sensitive to oxidization and can develop
corrosion, so they require surface protection like phosphate,
passivation, Ni, NiCuNi, Zn, Epoxy, NiCuNi+Sn or others.
Genuine Neodymium magnet, without La (Lanthanum) or Ce (Cerium) to destroy magnet quality
Outstanding magnetic properties – Br high to 14.5 kGs (1. 45T) and
(BH)max high to 52 MGOe (414 kJ/m3)
High demagnetization resistance –maximum Hcj higher than 35 kOe
High working temperature – maximum working temperature high to
Wide range of grades with new ones regularly being developed – High
magnetic properties, AH grades or Low Weight Loss materials and so
Normal Size Range: D (Outer Diameter): 1.5~180mm, d (Inner
Diameter): 0.4~100mm, T (Thickness): 0.4~150mm
Maximum Size: D180 x d100mm x T60mm, D80 x d60 x T180mm
Minimum Size: D1.5 x d0.4 x T0.4mm
Orientation Direction Size: Lower than 80mm
Tolerance: Generally +/-0.1mm, Particularly +/-0.05mm
The machining method for the outer diameter is same as that of the
cylinder. And then it goes to inner diameter drilling and then
slicing. Prior to coating, the small ring needs vibration tumbling
and the big ring needs manual chamfering.
Ring Neodymium Magnet Main Application:
Electric motors, sensors, speakers, magnetic assemblies, etc.
Main Test Items Prior to Delivery:
In order to ensure NdFeB magnets to meet requirements, we main test
following items: size, weight loss, magnetic properties, flux, flux
density, angle deviation, magnetic loss, appearance, coating
thickness, corrosion resistance, etc.