Neodymiummagnets have grades from N35 to N52. Simplistically, grade is generally used to describe how "strong" a permanent magnet material is. The energy product is specified in units of Gauss Oersted. One MGOe is 1,000,000 Gauss Oersted. For example, a grade N45 would have a Maximum Energy Product of 45 MGOe. The higher the grade the stronger the magnet.
Sky Magnetech (Ningbo) Co.,Ltd specializes in the high end of the magnet grades, typically N45 and N50 grades and are specified on each product page. The higher the grade the more expensive the magnets are to produce.
Neodymium Magnet Strength
Pull strength of a magnet is a very subjective measure and are generally not very accurate as it is dependent upon many external factors such as:
The material of the object being attracted
The size the object being attracted
The configuration of the magnet to the objects
Surface condition and finish
Direction of load
Operating temperature
All that being said, we provide a maximum pull force values for most of our magnets as a general guide only. It is noted that this is a maximum value under ideal conditions and should not be interpreted as a property of the magnet.