These are super strong rare earth countersunk ring magnets, which have a dimension of 30mm outside diameter, 5.5mm inner diameter, and 7m thickness. M5 screws are accepted to the countersunk hole. Rare earth neodymium countersunk ring magnets Ø30/5.5x7mm of N45 produce 13.8kg pulling force.Stronger force can be gotten by using thicker or higher-grade magnets. For the convenience of users, thick plastic gaskets are placed between Ø30/5.5x7mm countersunk neodymium ring magnets.
Note: countersunk ring magnets of neodymium are easy to break if a strong force is applied to them, recommend tightening torque of 2Nm when screwing them.
Remanence(Br): Neodymium countersunk magnets Ø30x7mm of N45 have remanence range of 13200 to 13800 Gs.
Coercivity（Hcj）: ≥955 KA/m.
Magnetic Energy Product(BHmax): N45 Countersunk neodymium magnets Ø30x7mm have BHmax range of 43 to 46 MGOe.
Max.Working Temp.: ≤80℃.
Common Coating: The common coating for Ø30x7mm countersunk ring neodymium magnets is nickel and epoxy.
As a professional neodymium countersunk magnet factory in China, Beilun Meank provides quality N45 Countersunk neodymium magnets Ø30x7mm series at great bulk prices. Feel free to contact us for further info.
+/- 0.05 mm
Direction Of Magnetization
Max. working temperature
lf you have any questions, you can contact us to help you solve them.