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0.875” X 0.125” RARE EARTH DISC MAGNET (4)

0.875” X 0.125” RARE EARTH DISC MAGNET (4)
0.875” X 0.125” RARE EARTH DISC MAGNET (4)0.875” X 0.125” RARE EARTH DISC MAGNET (4)

Part# MFM669

Rare-Earth Disc Magnets, 0.875 in. Diameter x 0.125 in. Thick, 4-Count

Product Description

These disc magnets are 0.875 inch (22.2mm) 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 9 lbs. Maximum working temperature is 176 F (80 C).

Part Number NSN0669
Imperial Dimensions 0.875 inch diameter x 0.125 inch thick
Metric Dimensions 22.225mm diameter x 3.175mm thick
Material Sintered Neodymium-Iron-Boron (NdFeB)
Shape Disc
Plating Ni-Cu-Ni (Nickel)
Magnetization Direction Thickness
Grade N40
Pull Force (lbs[g]) 9.35[4241]
Surface Field(G) 2680
Maximum Operating Temperature 80 Deg C (176 Deg F)
Dimensional Tolerance +/-0.005"
Magnet Quantity 4
Volume (cm3) 1.23
Weight (g) 9.24
Brand Magcraft
Packaging Magpak Tube
UPC 875661000696
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