Magnet Shape: Ring / Tube
Material: Hard Ferrite (Ceramic)
Coating: No Coating
Grade(USA Stardard): C11
Detailed magnetic properties data:
Residual Magnetic Flux Density (Br): 4.30 KGs (mT): 430 mT
Intrinsic Coercivity Force (Hcj): 2.51 KOe 200 KA/m
Coercivity Force (Hcb): 2.56 KOe 204 KA/m
Energy Density (BH)max: 4.32 MGOe 34.4 KJ/m³
Operating Temperature: -40 °C to +250 °C
Magnetisation Direction: Axial / Radially magnetized
Size (Can be customized according to customer drawings):
Outside Diameter(D): 45 mm
Inner Diameter(d): 22 mm
Thickness(T): 8 mm
Tolerance: +/-2% mm
Delivery time 7-25 days
Measurements
Ferrite magnets are very chemical and rust resistant, while neodymium magnets are not suitable for outdoor use.
Brittleness
Ferrite magnets can break into pieces when you repeatedly put a strain on them. Neodymium magnets are very brittle and crack easily, which can lead to injuries of user or bystanders.
Loss of adhesive force
Neither ferrite nor neodymium magnets lose their magnetisation by itself. They can only be demagnetised by external factors like heat or strong external magnetic fields.
Standard tolerances
Neodymium magnets generally have a tolerance of +/- 0,1 mm.
It's more complicated with ferrite magnets: Their height-related standard tolerance is +/- 0,1 mm; their width- and length-related tolerance is 2%, but at least 0,1 mm.
