Nd-Fe-B Magnet

Nd-Fe-B MAGNET Standard Product

Rare earth magnets can be classified into a samarium-cobalt magnet and a neodymium magnet. A characteristic of a samarium-cobalt magnet is strong magnetic force. Its merit is that it is resistant to rust and high temperature, but it tends to be easily broken. It is popular as the most suitable material for a small and lightweight magnet, like neodymium. A neodymium magnet can produce the strongest magnetic field in the world among those sold in the current market. The shape of a neodymium magnet can be round, square or ring according to what it is used for. Although it is mechanically strong, its surface is processed since it is easily rusted and therefore it must be used below 80°C.

Round Type

Measure:mm

OD × H Surface
magnetic
flux density
magnetic
absorption
Re-
marks
kG mT kgf N
1.2φ × 2 1.3 130 0.04 0.39 1)
1.5φ × 1.5 2.8 280 0.05 0.49  
2φ × 2 2.7 270 0.07 0.69  
2φ × 3 3.2 320 0.08 0.78  
3φ × 1.5 3.1 310 0.17 1.67  
3φ × 1.8 3.2 320 0.25 2.45  
3φ × 2 3.5 350 0.3 2.94  
3φ × 2.5 3.3 330 0.3 2.94  
3φ × 3 3.4 340 0.35 3.43  
3φ × 4 3.5 350 0.38 3.73  
4φ × 1.5 2.7 270 0.25 2.45  
4φ × 2 3.0 300 0.3 2.94  
4φ × 3 3.5 350 0.4 3.92  
4φ × 4 3.9 390 0.5 4.90  
4φ × 5 4.2 420 0.55 5.39  
5φ × 1 1.5 150 0.2 1.96  
5φ × 1.5 2.0 200 0.3 2.94 2)
5φ × 2 3.2 320 0.35 3.43  
5φ × 3 3.5 350 0.44 4.31  
5φ × 4 3.8 380 0.56 5.49  
5φ × 5 4.0 400 0.65 6.37  
5 .5φ × 1.7 2.1 210 0.3 2.94  
6φ × 2 2.2 220 0.4 3.92  
6φ × 3 2.9 290 0.6 5.88  
6φ × 5 3.5 350 0.75 7.35  
7φ × 2 3.0 300 0.7 6.86  
7φ × 3 3.5 350 0.77 7.55  
8φ × 1 1.8 180 0.5 4.90  
8φ × 2 2.2 220 0.65 6.37  
8φ × 3 3.5 350 1.1 10.79  
8φ × 4 3.6 360 1.25 12.26  
8φ × 5 4.0 400 1.4 13.73  
8φ × 8 4.2 420 1.8 17.65  
9φ × 3 3.2 320 1.2 11.77  
9.4φ × 0.8 1.5 150 0.4 3.92  
10φ × 2 2.6 260 1.3 12.75  
OD × H Surface
magnetic
flux density
magnetic
absorption
Re-
marks
kG mT kgf N
10φ × 3 3.5 350 2.0 19.61  
10φ × 4 3.8 380 2.4 23.54  
10φ × 5 4.2 420 2.6 25.50  
10φ × 10 4.8 480 3.65 35.79  
12φ × 1.3 2.0 200 1.45 14.22  
12.5φ × 1.5 2.0 200 1.8 17.65  
12.5φ × 2 2.0 200 1.9 18.63  
13φ × 10 4.8 480 6.1 59.82  
13φ × 20 5.5 550 9.5 93.16  
14φ × 10 4.5 450 6.4 62.76  
15φ × 1.5 1.8 180 1.1 10.79  
15φ × 1.7 2.0 200 1.3 12.75  
15φ × 3 3.2 320 3.7 36.28  
15φ × 4 3.3 330 4.0 39.23  
15φ × 5 3.3 330 4.5 44.13  
15φ × 10 4.2 420 6.8 66.69  
16φ × 10 4.2 420 7.2 70.61  
17.9φ × 2.5 2.7 270 2.5 24.52  
19φ × 10 4.0 400 9.8 96.11  
20φ × 5 2.8 280 6.3 61.78  
21φ × 4.6 3.2 320 7.0 68.65  
22φ × 10 4.5 450 15.3 150.04  
23.5φ × 3.4 2.0 200 4.0 39.23  
23.5φ × 4.5 2.2 220 4.8 47.07  
23.5φ × 5 2.4 240 5.6 54.92  
24φ × 20 5.0 500 40.0 392.27  
25φ × 3.4 1.8 180 4.2 41.19  
25φ × 5 2.5 250 7.5 73.55  
25φ × 6 3.0 300 8.0 78.45  
25φ × 9.8 3.5 350 14.0 137.29  
30φ × 15 5.0 500 22.0 215.75  
32φ × 10.5 4.0 400 26.0 254.97  
40φ × 10 3.8 380 35.0 343.23  
50φ × 20 5.1 510 53.0 519.75  
100φ × 15 3.7 370 75.0 735.50  

1) Gold plated, 2) Gold or Ni plated
*Surface magnetic flux density and the magnetic absorption are values for reference.

Ring Type

Measure:mm

OD × ID × H Surface
magnetic
flux density
magnetic
absorption
kG mT kgf N
5φ × 2.4φ × 3 2.2 220 0.3 2.94
6φ × 3φ × 4 3.3 330 0.4 3.92
6.6φ × 2φ × 1.5 2.0 200 0.28 2.75
8φ × 2φ × 2.5 3.0 300 0.9 8.83
8φ × 4φ × 5 3.7 370 1.2 11.77
8.5φX5.5φ × 0.8 1.0 100 0.2 1.96
10φ × 5φ × 5 3.6 360 1.8 17.65
10φ × 6φ × 1 1.7 170 0.7 6.86
10φ × 6φ × 10 3.3 330 2.5 24.52
10.5φ × 7.6φ × 1 1.6 160 0.7 6.86
11φ × 4φ × 10 3.2 320 3.2 31.38
12φ × 6φ × 0.8 1.6 160 0.7 6.86
12φ × 7φ × 6 3.6 360 2.2 21.57
13.5φ × 5φ × 2 2.2 220 1.0 9.81
14φ × 9φ × 4 3.0 300 3.0 29.42
OD × ID × H Surface
magnetic
flux × density
magnetic
absorption
kG mT kgf N
14.2φ × 10φ × 2 3.0 300 2.1 20.59
17φ X8.8φX1.25 1.8 180 1.0 9.81
18φ × 7φ × 6 3.6 360 5.5 53.94
19φ × 6.5φ × 10 4.5 450 8.4 82.38
23φ × 8φ × 3.5 3.0 300 3.5 34.32
23φ × 8φ × 14 4.2 420 12.0 117.68
23φ × 13φ × 1 1.3 130 1.8 17.65
25φ × 7φ × 6 3.6 360 7.3 71.59
26φ × 20φ × 6 3.5 350 5.5 53.94
31.2φX18.2φ × 1 1.2 120 3.2 31.38
39φ × 19φ × 7 3.5 350 20.0 196.13
59φ × 19φ × 10 4.5 450 45.0 441.30
70φ × 32φ × 15 4.5 450 50.0 490.33
76φ × 42φ × 6 3.5 350 55.0 539.37
98φ × 58φ × 10 4.0 400 65.0 637.43

*Surface magnetic flux density and the magnetic absorption are values for reference.

Ring Type (Disk Type)

Multipole pattern viewed
with magnetic viewer

Measure:mm

OD × ID × H Poles
26φ × 20φ × 4.7 4poles
48φ × 25φ × 3.5 4poles
60φ × 30φ × 8 8poles

Bar Type (Square Type)

Measure:mm

W × H × L Surface
magnetic
flux density
magnetic
absorption
kG mT kgf N
0.6 × 2 × 7 3.0 300 0.01 0.10
4 × 4 × 12 4.5 450 0.6 5.88
kG mT kgf N
4 × 7.5X 12 4.4 440 1.0 9.81
5 × 5 × 10 4.0 400 0.9 8.83

* Surface magnetic flux density and the magnetic absorption are values for reference.

Bar Type (Round Type)

Measure:mm

OD × L Surface
magnetic
flux density
magnetic
absorption
kG mT kgf N
1φ × 5 1.5 150 0.05 0.49
1.4φ × 5 1.5 150 0.08 0.78
1.5φ × 8 2.0 200 0.09 0.88
2φ × 5.5 3.5 350 0.12 1.18
2φ × 7 3.8 380 0.2 1.96
2.3φ × 4.5 3.3 330 0.15 1.47
2.5φ × 6 3.6 360 0.23 2.26
3φ × 5 3.4 340 0.4 3.92
3φ × 6 3.6 360 0.42 4.12
3φ × 10 4.0 400 0.5 4.90
4φ × 8 4.0 400 0.7 6.86
OD × L Surface
magnetic
flux density
magnetic
absorption
kG mT kgf N
5φ × 8 3.7 370 0.8 7.85
5φ × 10 4.0 400 0.9 8.83
5.5φ × 8 3.9 390 1.0 9.81
6φ × 10 4.0 400 1.1 10.79
6φ × 23 5.0 500 2.5 24.52
9φ × 10 4.2 420 2.2 21.57
16φ × 30 5.0 500 15.0 147.10
17.5φ × 20 4.7 470 17.0 166.71
19φ × 40 5.2 520 19.0 186.33
22.5φ × 25 5.0 500 24.0 235.36
23.5φ × 25 5.0 500 27.0 264.78

*Surface magnetic flux density and the magnetic absorption is a value for reference.

Square Type

Measure:mm

L × W × H Surface
magnetic
flux density
magnetic
absorption
Re-
marks
kG mT kgf N
2.4 × 2.4 × 1.8 2.0 200 0.04 0.39  
4 × 4 × 2 2.0 200 0.3 2.94  
6 × 6 × 4.5 3.2 320 0.85 8.34  
6.8 × 4X 2 2.8 280 0.45 4.41  
8 × 5 × 1.8 2.5 250 0.56 5.49  
9 × 5 × 1.5 2.3 230 0.7 6.86  
9 × 7 × 3 3.1 310 1.1 10.79  
10 × 3 × 3 3.3 330 0.65 6.37  
10 × 5 × 1 1.4 140 0.35 3.43  
10 × 10 × 2 2.0 200 1.5 14.71  
10 × 10 × 4 3.1 310 2.2 21.57  
10 × 10 × 6 4.2 420 2.6 25.50  
10 × 10 × 8 4.6 460 2.8 27.46  
10 × 10 × 10 4.9 490 3.6 35.30  
12 × 7 × 4 3.5 350 1.8 17.65  
12 × 10 × 4 3.3 330 2.9 28.44  
15 × 5 × 3 3.2 320 1.5 14.71  
15 × 6 × 2.8 3.0 300 1.6 15.69  
15 × 10 × 5 3.5 350 3.3 32.36  
16 × 3.25 × 4.1 4.3 430 2.3 22.56  
18 × 3.25 × 2.7 3.0 300 0.8 7.85  
18 × 3.25 × 4.1 3.5 350 1.0 9.81  
20 × 10 × 4 2.8 280 4.8 47.07  
20 × 10 × 5 3.2 320 6.0 58.84  
20 × 10 × 10 4.6 460 7.1 69.63  
20 × 12 × 5 3.0 300 6 58.84  
L × W × H Surface
magnetic
flux density
magnetic
absorption
Re-
marks
kG mT kgf N
20 × 15 × 5 3.0 300 6.3 61.78  
20 × 18 × 7.5 4.4 440 11.0 107.87  
22 × 21 × 5 2.9 290 7.2 70.61  
23 × 23 × 10 3.3 330 8.5 83.36  
24 × 24 × 12.5 4.2 420 23.0 225.55  
25.4 × 9.6 × 9.6 4.0 400 12.0 117.68  
25.4 × 25.4 × 12.7 4.0 400 23.5 230.46  
26 × 20 × 6 3.3 330 9.5 93.16  
28 × 13 × 4 3.3 330 6.7 65.70  
29.5 X4.15 × 2.15 2.5 250 2.2 21.57  
30 × 10 × 8 4.2 420 10.0 98.07  
30 × 30 × 5 3.0 300 12.0 117.68  
30 × 30 × 10 4.0 400 23.0 225.55  
30 × 30 × 10 4.0 400 23.0 225.55 1)
40 × 11 × 6 3.5 350 8.4 82.38  
40 × 15 × 5 3.0 300 9.0 88.26  
40 × 40 × 10 4.0 400 38.0 372.65  
46 × 30 × 10 4.0 400 35 343.23  
50 × 10 × 2 2.0 200 4.5 44.13  
50.8 × 50.8 × 12.7 4.0 400 65.0 637.43  
50.8 × 50.8 × 12.7 4.0 400 65.0 637.43 2)
50.8 × 50.8 × 25.4 4.8 480 80.0 784.53  
58 × 14 × 3 2.4 240 5.5 53.94  
60 × 30 × 10 3.8 380 45.0 441.30  
68 × 4 × 8 3.2 320 7.5 73.55  
79.5 × 4.5 × 1.5 1.8 180 4.5 44.13  

1) M3 Counter sunk, 2) M5 Counter sunk
*Surface magnetic flux density and the magnetic absorption is a value for reference.

Diametrically Magnetized Type

Measure:mm

OD × H [ID] Surface
magnetic
flux density
kG mT
8φ × 1 2.7 270
2.2φ × 5.8 3.5 350
3.4φ × 7.6 (1.1φ) 3.5 350
4φ × 10 4.1 410
13φ × 20 5.0 500

*Surface magnetic flux density is a value for reference.

Flat Round Type

Measure:mm

Size Surface
magnetic
flux density
Remarks
kG mT
0.5 × 0.5 × 0.5 1.0 100  
1φ × 0.5 1.5 150  
1.46φ × 0.98 2.4 240  
2φ × 0.5 1.5 150  
3φ × 0.8 2.1 210 1)

*Surface magnetic flux density is a value for reference.

Ball Type

Measure:mm

OD Remarks Surface magnetic flux density Remarks
kG mT
3 O Gold plated 3.2 320  
5 O Gold plated 4.5 450  
8 O Gold plated 5.5 550  
10 O Gold plated 5.8 580  
15 O Gold plated 6.5 650  
1)3 O Ni plated 3.2 320 1)
5 O Ni plated 4.5 450  
8 O Ni plated 5.5 550  
10 O Ni plated 5.8 580  
15 O Ni plated 6.5 650  

1)1.2 O pieced