Magcraft Magnets . MFM 0.5” X 0.25” X 0.125” Rare Earth Ring Magnet (12)

Rare-Earth Ring Magnets, 0.5 in. Outside Diameter x 0.25 in. Inside Diameter x 0.125 in. Thick, 12-Count
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SPECIFICATIONSThese ring magnets are 0.500"(12.7mm) outside diameter x 0.250"(6.4mm) inside diameter x 0.125"(3.2mm) thick. They are magnetized through the thickness. They are composed of grade 40 neodymium iron boron magnetic material and are plated in nickel-copper-nickel for a shiny corrosion resistant finish. Their individual pull force is approximately 2.6 lbs. Maximum working temperature is 176 F (80 C). Part Number NSN0814 Imperial Dimensions 0.5 inch outside diameter x 0.25 inch inside diameter x 0.125 inch thick Metric Dimensions 12.7mm outside diameter x 6.35mm inside diameter x 3.175mm thick Material Sintered Neodymium-Iron-Boron (NdFeB) Shape Ring Plating Ni-Cu-Ni (Nickel) Magnetization Direction Thickness Grade N40 Pull Force (lbs[g]) 2.67[1211] Surface Field(G) 3323 Maximum Operating Temperature 80 Deg C (176 Deg F) Dimensional Tolerance +/-0.005" Magnet Quantity 12 Volume (cm3) 0.3 Weight (g) 2.26 Brand Magcraft Packaging Magpak Tube UPC 875661001143 Remanent Flux Density Br (kG [T]) 12.5-12.8 [1.25-1.28] Coercivity HcB (kOe [kA/m]) >=11.3 [>=923] Intrinsic Coercivity HcJ (kOe [kA/m]) >=12.0 [>=995] Maximum Energy Product Bhmax (MGOe [kJ/m3]) 38-41 [302-326] Density p(g/cm3) >=7.45 Compression Strength (Mpa) 600-1200 Bending Strength (Mpa) 150-380 Vickers Hardness (HV) 460-660 Recoil Permeability (urec) 1.05 Electrical Resistance (Ohm*mm2/m) 1.25-1.55 Curie Temperature Tc (°C) 310 Thermal Expansion Coefficient 100°C//(x10^-6/K) 6 Thermal Expansion Coefficient 100°C?(x10^-6/K) -1
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