SPECIFICATIONSThese ring magnets are 0.750 inch (19.1mm) diameter, 0.375 inch (9.5mm) inside diameter and 0.125 inch (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 4 lbs. Maximum working temperature is 176 F (80 C).
Part Number NSN0615
Imperial Dimensions 0.75 inch outside diameter x 0.375 inch inside diameter x 0.125 inch thick
Metric Dimensions 19.05mm outside diameter x 9.525mm 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]) 4.01[1819]
Surface Field(G) 3194
Maximum Operating Temperature 80 Deg C (176 Deg F)
Dimensional Tolerance +/-0.005"
Magnet Quantity 6
Volume (cm3) 0.68
Weight (g) 5.09
Brand Magcraft
Packaging Magpak Tube
UPC 875661000153
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
