Relationship of Data
I wanted to study the relationship between the Pull Force and Surface Gauss readings of various NIBs with a common dimensions. I used data prepared by K&J Magnetics for this study and graphed it in Excel. The results are interesting.
Comparison of 1/16" Thick Disks of Varying Diameters.
| Size | "N" | PF | Gauss | |
| 1 | 1/8" x 1/16" | N42 | 0.91 | 2980 |
| 2 | 3/16" x 1/16" | N42 | 2.03 | 2775 |
| 3 | 1/4" x 1/16" | N42 | 3.67 | 2580 |
| 4 | 5/16" x 1/16" | N42 | 6 | 2380 |
| 5 | 3/8" x 1/16" | N42 | 8.08 | 2135 |
| 6 | 7/16" x 1/16" | N42 | 11 | 2105 |
| 7 | 1/2" x 1/16" | N42 | 16.67 | 2100 |
| 8 | 9/16" x 1/16" | N42 | 19.2 | 1920 |
| 9 | 5/8" x 1/16" | N42 | 23.87 | 1895 |
| 10 | 3/4" x 1/16" | N42 | 33.25 | 1885 |
| 11 | 7/8" x 1/16" | N42 | 44.4 | 1850 |
| 12 | 1" x 1/16" | N42 | 55.75 | 1795 |
The Graph below shows the visual relationship between 20 times the Pull Force and the Surface Gauss ratings of 1/16" thick NIBs.
To my surprise, the 1/8" dia by 1/16" thick disk has a much higher Surface Gauss reading than a 1" dia by 1/16" thick disk
Comparison of 1" by 1" Blocks of Varying Thickness.
|
Size |
"N" |
PF |
Gauss |
|
|
1 |
1" x 1" x 1/16" |
N42 |
73.2 |
1990 |
|
2 |
1" x 1" x 1/8" |
N42 |
77 |
2900 |
|
3 |
1" x 1" x 1/4" |
N42 |
85.07 |
4190 |
|
4 |
1" x 1" x 3/8" |
N42 |
87.39 |
4795 |
|
5 |
1" x 1" x 1/2" |
N42 |
87.9 |
5360 |
|
6 |
1" x 1" x 1" |
N42 |
88.2 |
6835 |
The Graph below shows the visual relationship between 10 times the Pull Force and the Surface Gauss ratings of 1" by 1" Block NIBs.
Its easy to see a minor increase in Pull Force and a substantial increase in Surface Gauss readings as the magnets get thicker. This shows the potential pain factor involved in getting a finger caught between identical magnets slamming together. If your finger was bitten by a pair of 1" by 1" by 1/16" thick NIBs damage would be minimal. If you got caught between a pair of 1" by 1" by 1" thick NIBs damage would be substantial, even resulting in a possible broken bone and lots of pain.