This is a round magnet with hole at the center, is made of samarium cobalt, also can called rare earth samarium cobalt ring magnet. The specific size is 60mm in outer diameter, 24mm in inner diameter, 10mm in thickness. Compared with neodymium magnets of the same size and shape, the magnet has better temperature resistance, can withstand 350 ° C, and can prevent corrosion and oxidation without coating. The hole you can choose straight hole or countersunk hole, the quantity and place also can be chose.
Physical characteristic parameters of SmCo5 and Sm2Co17;
|Thermal expansion coefficient (vertical orientation)/(10-6/℃)||10-6/℃||13||11|
|Thermal expansion coefficient (parallel orientation)/(10-6/℃)||10-6/℃||6||8|
|Saturation magnetization magnetic field||kA/m||＞1600||＞3200|
Other size smco ring magnet you may be want: