Surface field vs pull force(attraction force) of multiple magnets?

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SUMMARY

The discussion centers on the phenomenon where magnets with identical surface fields (5754 Gauss) exhibit varying pull forces, as demonstrated by the provided table. The pull force increases with the size of the magnets, indicating a direct correlation between magnet dimensions and attraction force. Specifically, the pull forces range from 4.25 lb for the B444 magnet to 76.41 lb for the BX0X0X0 magnet. This discrepancy is attributed to the size and cross-sectional area of each magnet, which significantly influences their magnetic strength despite having the same surface field rating.

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  • Understanding of magnetic field concepts
  • Familiarity with magnet dimensions and their properties
  • Knowledge of Gauss as a unit of magnetic flux density
  • Basic principles of magnetism and attraction forces
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  • Research the relationship between magnet size and pull force
  • Explore the concept of magnetic field strength versus surface field
  • Investigate how cross-sectional area affects magnetic attraction
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This discussion is beneficial for physicists, engineers, and hobbyists interested in magnet design, magnetic field analysis, and applications requiring precise magnetic force calculations.

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In the following "semi" table, is a group of magnets,
all seem to have the same Surface field but all different pull force(attraction/repulsive force at maximum with gap = 0).
How is it possibile to have the same S.field rate but different forces? Is it due to the size of each magnet?


Magnets Length Width Thickness Surface Field Pull Force
(Gauss) (lb)

B444 1/4 " 1/4 " 1/4 " 5754 4.25
B666 3/8 " 3/8 " 3/8 " 5754 10.07
B888 1/2 " 1/2 " 1/2 " 5754 18.71
BCCC 3/4 " 3/4 " 3/4 " 5754 40.59
BX0X0X0 1 " 1 " 1 " 5754 76.41
 
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X Y A B C D

X = Magnet
Y = Length"
A = Width"
B = Thickness"
C = Surface field (Gauss)
D = Pull force (lb)
 
Try plotting your pull force versus linear dimension and see what you get. How about pull force versus
cross sectional area?
 

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