what is the highest grade/field strength magnet in the market?

[Cairun]

thanks, hazens.  i got my magnets from kjmagnetics as well.  i am looking for ring/tube magnets, and kjmagnetics only have grade n42 for ring/tube magnets.  thanks for suggestions though.

[AbbaRue]

I thought I should mention that it doesn't matter how thick a magnet is that doesn't increase the strength.

[jadaro2600]

K&J is where I get my magnets ...if you can't get whatever it is working with an N42, what makes you think it will work with an N50 or an N52 or NXX?

btw, N38's are horrible - they're like rare earth mags without any heat resilience.

[Honk]

All neos without the marking M, H, SH, UH, EH or AH after the grade are limited to 80 degrees centigrade.
This has nothing to do with N38:s

M  -  handles 100 degrees C
H  -  handles 120 degrees C
SH - handles 150 degrees C
UH - handles 180 degrees C
EH - handles 200 degrees C
AH - handles 220 degrees C

Please see attachment.

[eddywind]

some of my experience.
we make job shop customized motor for customers.many engineers asked us same qestion during their design process.

in fact, highest Br(Remanence) is not the only character should be considered.

Br, Hc and thickness of magnets should be considered together. sometimes, the reason of  magnetic field strength not enough is not becasue of low Br, but low Hc. Or thinkness is not enough, the working point is not good.