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Ring/Tube Neodymium Magnets
Magnetic solution
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25 years of professional experience
Innovative solutions for sustainable developments toward a better world
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Ring/Tube Neodymium Magnets

Material Sintered Neodymium Iron Boron
Dimensions Outer Diameter Min.3.0 mm—Max.200 mm
Inner Diameter Min.1.5 mm—Max.150 mm
Height Min.0.5 mm—Max.50 mm
Tolerance Standard +/-0.05mm, Min.+/-0.01mm
Magnetization Orientation Axial, Diametrical, Radial
Magnetic Properties Grade Max. Operating Temperatures
N35-N52 80°C  (176°F)
33M- 48M 100°C (212°F)
33H-48H 120°C  (248°F)
30SH-45SH 150°C  (302°F)
30UH-40UH 180°C (356°F)
28EH-38EH 200°C (392°F)
28AH-35AH 230°C (428°F)
Remanence(Br) 11,300 Gauss —  14,800 Gauss
Coercive Force(Hcb) 10,000 Oersted — 12,600 Oersted
Intrinsic Coercive Force(Hcb) 11,000 Oersted — 36,000 Oersted
Magnetic Energy Product (BH) 33M GOe — 53M GOe
Surface Treatment Ni-Cu-Ni, Nickel, Zn, Gold, Silver, Copper, Epoxy, Chemical, PTFE, Parylene, Everlube, Passivation and more.