Magnet Shape: Ring / Tube
Material: Hard Ferrite (Ceramic)
Coating: No Coating
Grade(USA Stardard):         C8(C8A)

Detailed magnetic properties data:
Residual Magnetic Flux Density (Br): 3.85 KGs (mT):  385 mT
Intrinsic Coercivity Force (Hcj):    2.95 KOe    235 KA/m
Coercivity Force (Hcb):              3.05 KOe    242 KA/m
Energy Density (BH)max:              3.50 MGOe   27.8 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):  92 mm
Inner Diameter(d):    30 mm
Thickness(T):           16 mm
Tolerance:         +/-2% mm
Delivery time           7-25 days
Measurements

Magnetic Ferrites, Lower Service Temperature Than Alnico, Greater Than Rare Earth
High-intrinsic coercive force
Available in simple shapes only due to manufacturing process
Ceramic Ferrite Ring Magnets are widely used in loud speakers, motors, relays, switches, pot magnets and also in conjunction with proximity meters to record speed or degrees of rotation. Large ring magnets are used inside head rollers on conveyors for tramp iron removal and also around water pipes to help prevent deposits of minerals on the inside of the pipe walls and descale the existing deposits. In stock, diameter sizes range between 27mm and 220mm and thicknesses from 5mm up to 20mm. An advantage is the high maximum operating temperature of 250 degrees Celsius. Alternative sizes can be made if required.