Strontium Ferrite Ring Magnet 30 x 12,7 x 7 mm
The strontium ferrite (SrFe) magnet offers an economical, robust solution where resistance to moisture, corrosion and temperature is more important than maximum strength for a given size. Unlike neodymium, ferrite does not require a protective coating and can be used at temperatures up to 250 °C, although its magnetic strength is lower for the same volume. The ring shape is useful for mounting centred on a shaft or screw and for technical assemblies where positioning is important.
The The 30 x 12,7 x 7 mm size suits mounting on a shaft, screw or magnetic spacer and simplifies centring. Suitable for outdoor use, damp environments, high-temperature applications and uses where low cost and operating stability are important.
Warning: The material is ceramic and brittle. Impacts or excessive clamping pressure can cause the magnet to chip or break. This is not a toy. Keep away from children and electronic equipment and devices sensitive to magnetic fields.
Strontium Ferrite Ring Magnet 30 x 12,7 x 7 mm
| Shape | Ring |
| Dimensions | 30 x 12,7 x 7 mm |
| Outer Diameter | 30 mm |
| Inner Diameter | 12,7 mm |
| Height | 7 mm |
| Material | Strontium ferrite (SrFe12O19 / SrFe) |
| Magnetic Grade | Y35 |
| Coating | Uncoated |
| Dimensional Tolerance | Dext 0,6 mm / Dint 0,25 mm / h 0,1 mm |
| Approximate Weight | 19,7 g |
| Holding Force | approx. 1,5 kg (14,71 N) |
| Maximum Operating Temperature | 250 °C |
| Curie Temperature | 450 °C |
| Magnetisation Direction | Axial |
| Remanence Br | 0,40 - 0,41 T (4000 - 4100 G) |
| Coercivity bHc | 175 - 195 kA/m (2,20 - 2,45 kOe) |
| Intrinsic Coercivity iHc | 180 - 200 kA/m (2,26 - 2,51 kOe) |
| Maximum Energy Product BHmax | 30,0 - 32,0 kJ/m³ (3,8 - 4,0 MGOe) |
| Corrosion Resistance | Very Good |
| Design | Standard |
| Note | Minor chips or manufacturing marks may occur without affecting performance. |
