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Neodymium 20mmX20mmX3mm/M4 S-pole

Countersunk screw side
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Product specification 2D DESIGN 3D DESIGN
Back
Voice Name Symbol SI CGS
Shape Internal diameter ID 4.3 mm 0.43 cm
Supplementation S 8.6 mm 0.86 cm
Length L 20 mm 2 cm
Width W 20 mm 2 cm
Height H 3 mm 0.3 cm
Screw M 4 mm 0.4 cm
direction of magnetization M A
Weight Net 0.009 kg 9 g
Surface treatment Ni 12 μm  
Magnetic
Characteristics		 Surface magnetic flux density B 155.6 mT 1556 Gauss
Suction force
Adhesion		 F 3.71 kgf 3716 gf
Magnetic flux density on load point Bd 264.9 mT 2649 Gauss
Total flux φo 0.00010599 Wb 10599 Mx
Permeance Coefficient Pc 0.3 Pc  
Maximum usage temperature Tw 70 ℃
Minimum usage temperature Tw  ℃
Material properties Materialsymbols Neodymium 35  
remanence Br 1170-1220 mT 11.7-12.2 kG
Coercivity Hcb ≧868 kA/m  kOe
Intrinsic coercive force Hcj ≧955 kA/m  kOe
Maximum energy product BH 263-287 kj/m3  MGOe
Temperature coefficient Br -0.12 %/℃  
Hcj -0.55 %/℃
Heat resistant temperature Tw ≦80 ℃
Curie temperature Tc 310 ℃
Density ρ 7.5 kg/m3
Remarks REACH RoHS Directive

*Magnetic flux density and attraction/heat force depends on the measurement equipment and the environment. These are only references values, these are not the guaranteed value.