Neodymium Φ18mmXΦ4.3mmX5mm/M4 N-pole

Countersunk screw side
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Voice Name Symbol SI CGS
Shape Diameter D 18 mm 1.8 cm
Internal diameter ID 4.3 mm 0.43 cm
Supplementation S 8.6 mm 0.86 cm
Height H 5 mm 0.5 cm
Screw M 4 mm 0.4 cm
direction of magnetization M A
Weight Net 0.00899 kg 8.99 g
Surface treatment Ni 12 μm  
Surface magnetic flux density B 284.6 mT 2846 Gauss
Suction force
F 4.23 kgf 4232 gf
Magnetic flux density on load point Bd 553 mT 5530 Gauss
Total flux φo 0.00013269 Wb 13269 Mx
Permeance Coefficient Pc 0.91 Pc  
Maximum usage temperature Tw 85 ℃
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.