Why are some people worth $8/hr, some $12 and some more than $100/hr.WHY are some rare earth magnets N52 some are N48 and some N35 being the weakest?
Temp? I don't think so. Temp has to do with the binder technology for the powdered magnetic materials. There is a separate code for temp rating on these magnets.It's a tradeoff between strength and temperature rating.
Yeah you're right. But your reasoning about the binder technology sounds a bit strange to me. How come the concerns I always hear about magnets at higher temperatures is demagnetization first, and never the disintegration of the binder material?Temp? I don't think so. Temp has to do with the binder technology for the powdered magnetic materials. There is a separate code for temp rating on these magnets.
Because you are confusing alloy magnets with NdFeB magnets. The Curie Temp (demagnetization temp) of a powdered NdFeB magnet is way above the max operating temp of the binder. 400°F difference for the more standard binders.Yeah you're right. But your reasoning about the binder technology sounds a bit strange to me. How come the concerns I always hear about magnets at higher temperatures is demagnetization first, and never the disintegration of the binder material?
Your first table must have a typo - your second table clearly states that the "N" class (lowest temp rating) means 80°C max working temp. I don't know why they show an N52 to be <65°C. If it is less than 80, it is not an N52.This table does show that N52 magnets have a lower working temperature than the N35 &N48 magnets.
Here is a link to more information on neodymium magnets.
Les.
No, I know we're talking about NdFeB magnets here. By alloy magnets I assume you mean something like Samarium Cobalt which is more expensive and used when temperatures exceed what NdFeB can handle.Because you are confusing alloy magnets with NdFeB magnets. The Curie Temp (demagnetization temp) of a powdered NdFeB magnet is way above the max operating temp of the binder. 400°F difference for the more standard binders.
That is a good place to start the investigation. A 52 will be heaver than a 48 if both magnets are the same physical size.The powders used to make them are sintered to a higher density and less oxidation during the processing. A fraction of a percent of void space make a huge difference.