Square-Block Magnet Force Specifications in Pounds, Newtons, Grams

Square Nd Magnets
Field Strengths & Holding Force

These square magnets are N42 ~13,000 gauss (1.3T-N42 grade). Field strengths have been calculated using finite element analysis at the surface and 4 places above the central point and are estimated to be within 10% of actual. For surface measurements, these values are more accurate than a magnetometer since such devices have an airgap of at least 0.1mm between the magnet and sensor. The 0mm measurement is a maximum theoretical value that assumes there is no nickel coating.

The holding forces are also theoretical maximums based on optimum permeability, thickness, area of the metal attached to and no nickel or other coating. The attractive/repulsive force of 2 identical magnets is double this value.

N42 grade; ~13,000 Gauss: 1.3Tesla
nickel-copper-nickel coated
size tolerance for dimensions <10mm: +/- 0.05mm
size tolerance for dimensions >10mm: +/- 0.1mm
magnet strength variance piece to piece: <8%
80C maximum operating temperature
axis of magnetization is perpendicular to page

Metric measurement explained:
25mm (2.5cm) = ~1 inch; 2.5mm (0.25cm) = ~ 1/10 inch;

Scientific notation explained:
1.15E+03=1150; 1.15E+02=115; 1.15E+01=11.5; 1.15E+00=1.15; 1.15E-01=0.12; 1.15E-02=0.01

Field Strengths (in gauss) at 5 Distances (in mm); Holding Force in 3 Units

Size (mm)

0.1

100

lbs

gms

2.5x2.5x1

3.84E+03

3.61E+03

1.56E+03

1.11E+01

1.00E-02

0.4

177

5x5x1

2.23E+03

2.19E+03

1.61E+03

4.09E+01

5.00E-02

0.8

355

5x5x2.5

4.40E+03

4.26E+03

2.92E+03

8.57E+01

1.30E-01

2.0

887

7.5x7.5x1

6.47E+03

5.64E+03

1.78E+03

4.85E+01

1.1E-01

1.2

532

7.5x7.5x2.5

6.29E+03

5.94E+03

3.35E+03

1.2E+02

2.6E-01

2.9

1332

7.5x7.5x5

6.0E+03

5.82E+03

4.18E+03

2.33E+02

5.3E-01

5.9

2664

10x10x1

6.51E+03

5.67E+03

1.83E+03

6.83E+01

1.8E-01

1.6

710

10x10x2.5

2.70E+03

2.67E+03

2.34E+03

2.65E+02

5.00E-01

3.9

1775

10x10x5

4.40E+03

4.33E+03

3.66E+03

4.25E+02

9.70E-01

7.8

3549

12.5x12.5x1

6.52E+03

5.69E+03

1.86E+03

8.62E+01

2.7E-01

1.9

888

12.5x12.5x2.5

2.23E+03

2.22E+03

2.02E+03

3.50E+02

7.80E-01

4.9

2218

12.5x12.5x5

3.84E+03

3.80E+03

3.36E+03

5.73E+02

1.51E+00

9.8

4436

25x25x2.5

1.17E+03

1.14E+03

5.55E+02

3.07E+00

9.8

4441

25x25x5

2.23E+03

2.22E+03

2.14E+03

9.81E+02

5.93E+00

19.6

8882

Email:
Distribution & Mail 169 Lexington Court, Unit I Waterloo, ON, N2J 4R9	Distribution Only Niagara Falls, NY 14305 See: Returns Policy
Phone: (519) 746-4761 Fax: (519) 747-5636 Or ORDER toll-free at: 1 (877) 746-4764
Waterloo Region Customers: No walk-in store-order on-line, then call to arrange pickup. Choose pickup as "freight" option; $5.00 minimum.

Square Nd Magnets Field Strengths & Holding Force

Square Nd Magnets
Field Strengths & Holding Force