Neodymium magnet (strong magnet)

Neodymium magnet standard product

There are two types of rare earth magnets: neodymium magnets (neodymium Nd-Fe-B) and samarium-cobalt magnets (Sm-Co).
Neodymium magnets create a strong magnetic field that is said to be the strongest in the world on the current market.Depending on the application, the shape can be processed into a round shape, a square shape, a ring shape, etc.Although it has excellent mechanical strength, it is surface-treated because it is easily rusted, and it is generally required to be used at 80 ° C or lower.
Neodymium magnet
Round type Ring type Ring type (disk type) Bar type (square type) Bar type Square type Radial magnetization type Super thin type Ball type

Round shape

neodymium magnet round
Unit: mm
OD x H Surface magnetic flux density Adsorption power Remarks
mT kG N kgf
1.2φ x 2 130 1.3 0.54 0.06 1)
1.5φ x 1.5 280 2.8 0.75 0.08  
2φ x 2 270 2.7 1.39 0.14  
2φ x 3 320 3.2 1.57 0.16  
3φ x 1.5 310 3.1 2.05 0.21  
3φ x 1.8 320 3.2 2.41 0.25  
3φ x 2 350 3.5 2.61 0.27  
3φ x 2.5 330 3.3 2.99 0.31  
3φ x 3 340 3.4 3.25 0.33  
3φ x 4 350 3.5 3.57 0.36  
4φ x 1.5 270 2.7 2.69 0.27  
4φ x 2 300 3.0 3.69 0.38  
4φ x 3 350 3.5 5.10 0.52  
4φ x 4 390 3.9 5.88 0.60  
4φ x 5 420 4.2 6.34 0.65  
5φ x 1 150 1.5 2.53 0.26  
5φ x 1.5 200 2.0 3.50 0.36 2)
5φ x 2 320 3.2 4.57 0.47  
5φ x 3 350 3.5 6.87 0.70  
5φ x 4 380 3.8 8.35 0.85  
5φ x 5 400 4.0 9.29 0.95  
5.5φ x 1.7 210 2.1 4.36 0.45  
6φ x 2 220 2.2 5.54 0.57  
6φ x 3 290 2.9 8.45 0.86  
6φ x 5 350 3.5 12.39 1.26  
7φ x 2 300 3.0 6.64 0.68  
7φ x 3 350 3.5 9.80 1.00  
8φ x 1 180 1.8 4.80 0.49  
8φ x 2 220 2.2 7.79 0.80  
8φ x 3 350 3.5 10.96 1.12  
8φ x 4 360 3.6 15.13 1.54  
8φ x 5 400 4.0 18.43 1.88  
8φ x 8 420 4.2 24.16 2.47  
9φ x 3 320 3.2 12.57 1.28  
9.4φ x 0.8 150 1.5 3.84 0.39  
10φ x 2 260 2.6 10.23 1.04  
OD x H Surface magnetic flux density Adsorption power Remarks
mT kG N kgf
10φ x 3 350 3.5 14.22 1.45  
10φ x 4 380 3.8 18.57 1.90  
10φ x 5 420 4.2 23.76 2.42  
10φ x 10 480 4.8 37.94 3.87  
12φ x 1.3 200 2.0 8.91 0.91  
12.5φ x 1.5 200 2.0 11.13 1.14  
12.5φ x 2 200 2.0 13.56 1.38  
13φ x 10 480 4.8 56.61 5.78  
13φ x 20 550 5.5 64.47 6.58  
14φ x 10 450 4.5 62.77 6.41  
15φ x 1.5 180 1.8 12.43 1.27  
15φ x 1.7 200 2.0 14.84 1.51  
15φ x 3 320 3.2 23.10 2.36  
15φ x 4 330 3.3 29.12 2.97  
15φ x 5 330 3.3 35.17 3.59  
15φ x 10 420 4.2 68.79 7.02  
16φ x 10 420 4.2 74.64 7.62  
17.9φ x 2.5 270 2.7 25.33 2.59  
19φ x 10 400 4.0 90.93 9.28  
20φ x 5 280 2.8 49.18 5.02  
21φ x 4.6 320 3.2 48.73 4.97  
22φ x 10 450 4.5 105.13 10.73  
23.5φ x 3.4 200 2.0 44.80 4.57  
23.5φ x 4.5 220 2.2 54.98 5.61  
23.5φ x 5 240 2.4 59.66 6.09  
24φ x 20 500 5.0 203.26 20.74  
25φ x 3.4 180 1.8 48.57 4.96  
25φ x 5 250 2.5 64.36 6.57  
25φ x 6 300 3.0 74.40 7.59  
25φ x 9.8 350 3.5 114.38 11.67  
30φ x 15 500 5.0 216.46 22.09  
32φ x 10.5 400 4.0 167.67 17.11  
40φ x 10 380 3.8 197.33 20.14  
50φ x 20 510 5.1 470.58 48.02  
100φ x 15 370 3.7 834.34 85.14  

1) Gold plating 2) Compatible with both gold plating and Ni plating
* Surface magnetic flux density and suction force are reference values.

Bar type (round type)

neodymium magnet bar type
Unit: mm
OD x L Surface magnetic flux density Adsorption power
mT kG N kgf
1φ x 5 150 1.5 0.39 0.04
1.4φ x 5 150 1.5 0.80 0.08
1.5φ x 8 200 2.0 0.94 0.10
2φ x 5.5 350 3.5 1.69 0.17
2φ x 7 380 3.8 1.72 0.18
2.3φ x 4.5 330 3.3 2.20 0.22
2.5φ x 6 360 3.6 2.67 0.27
3φ x 5 340 3.4 3.73 0.38
3φ x 6 360 3.6 3.82 0.39
3φ x 10 400 4.0 3.98 0.41
4φ x 8 400 4.0 6.92 0.71
OD x L Surface magnetic flux density Adsorption power
mT kG N kgf
5φ x 8 370 3.7 10.57 1.08
5φ x 10 400 4.0 10.93 1.12
5.5φ x 8 390 3.9 12.61 1.29
6φ x 10 400 4.0 15.44 1.58
6φ x 23 500 5.0 16.56 1.69
9φ x 10 420 4.2 31.86 3.25
16φ x 30 500 5.0 114.21 11.65
17.5φ x 20 470 4.7 122.96 12.55
19φ x 40 520 5.2 163.62 16.70
22.5φ x 25 500 5.0 228.14 23.28
23.5φ x 25 500 5.0 229.12 23.38

* Surface magnetic flux density and suction force are reference values.

Radial magnetizing type

Neodymium magnet radial magnetization type
Unit: mm
OD x H [ID] Surface magnetic flux density
mT kG
8φ x 1 270 2.7
2.2φ x 5.8 350 3.5
3.4φ x 7.6 (1.1φ) 350 3.5
4φ x 10 410 4.1
13φ x 20 500 5.0

* The surface magnetic flux density is a reference value.

Super Usu type

Neodymium magnet super thin type
Unit: mm
Size Surface magnetic flux density Remarks
mT kG
0.5 × × 0.5 0.5 100 1.0  
1φ x 0.5 150 1.5  
1.46φ x 0.98 240 2.4  
2φ x 0.5 150 1.5  

* The surface magnetic flux density is a reference value.

Ring type

neodymium magnet ring type
Unit: mm
OD x ID x H Surface magnetic flux density Adsorption power
mT kG N kgf
5φ x 2.4φ x 3 220 2.2 6.33 0.65
6φ x 3φ x 4 330 3.3 9.39 0.96
6.6φ x 2φ x 1.5 200 2.0 6.25 0.64
8φ x 2φ x 2.5 300 3.0 12.33 1.26
8φ x 4φ x 5 370 3.7 16.78 1.71
8.5φ x 5.5φ x 0.8 100 1.0 4.96 0.51
10φ x 5φ x 5 360 3.6 24.67 2.52
10φ x 6φ x 1 170 1.7 7.16 0.73
10φ x 6φ x 10 330 3.3 25.63 2.62
10.5φ x 7.6φ x 1 160 1.6 8.61 0.88
11φ x 4φ x 10 320 3.2 40.19 4.10
12φ x 6φ x 0.8 160 1.6 7.56 0.77
12φ x 7φ x 6 360 3.6 32.90 3.36
13.5φ x 5φ x 2 220 2.2 17.18 1.75
14φ x 9φ x 4 300 3.0 33.93 3.46
OD x ID x H Surface magnetic flux density Adsorption power
mT kG N kgf
14.2φ x 10φ x 2 300 3.0 21.66 2.21
17φ x 8.8φ x 1.25 180 1.8 17.88 1.82
18φ x 7φ x 6 360 3.6 69.42 7.08
19φ x 6.5φ x 10 450 4.5 101.35 10.34
23φ x 8φ x 3.5 300 3.0 51.03 5.21
23φ x 8φ x 14 420 4.2 158.64 16.19
23φ x 13φ x 1 130 1.3 16.73 1.71
25φ x 7φ x 6 360 3.6 97.96 10.00
26φ x 20φ x 6 350 3.5 89.38 9.12
31.2φ x 18.2φ x 1 120 1.2 19.76 2.02
39φ x 19φ x 7 350 3.5 179.04 18.27
59φ x 19φ x 10 450 4.5 401.21 40.94
70φ x 32φ x 15 450 4.5 765.14 78.08
76φ x 42φ x 6 350 3.5 415.31 42.38
98φ x 58φ x 10 400 4.0 741.61 75.67

* Surface magnetic flux density and suction force are reference values.

Ring type (disc type)

Neodymium magnet ring type (disc type) Neodymium magnet ring type (disc type)Magnetization pattern seen by the viewer
Unit: mm
OD x ID x H Number of poles
26φ x 20φ x 4.7 4-pole magnetization
48φ x 25φ x 3.5 4-pole magnetization
60φ x 30φ x 8 8-pole magnetization

Square

square neodymium magnet
Unit: mm
L × W × H Surface magnetic flux density Adsorption power Remarks
mT kG N kgf
2.4 × × 2.4 1.8 200 2.0 2.07 0.21  
4 × × 4 2 200 2.0 4.13 0.42  
6 × × 6 4.5 320 3.2 13.53 1.38  
6.8 × × 4 2 280 2.8 5.58 0.57  
8 × × 5 1.8 250 2.5 6.09 0.62  
9 × × 5 1.5 230 2.3 4.98 0.51  
9 × × 7 3 310 3.1 12.34 1.26  
10 × × 3 3 330 3.3 9.71 0.99  
10 × × 5 1 140 1.4 4.35 0.44  
10 × × 10 2 200 2.0 10.05 1.03  
10 × × 10 4 310 3.1 20.56 2.10  
10 × × 10 6 420 4.2 31.75 3.24  
10 × × 10 8 460 4.6 39.77 4.06  
10 × × 10 10 490 4.9 45.08 4.60  
12 × × 7 4 350 3.5 19.82 2.02  
12 × × 10 4 330 3.3 22.68 2.31  
15 × × 5 3 320 3.2 16.69 1.70  
15 × × 6 2.8 300 3.0 16.51 1.69  
15 × × 10 5 350 3.5 32.53 3.32  
16 × × 3.25 4.1 430 4.3 22.32 2.28  
18 × × 3.25 4.1 350 3.5 24.79 2.53  
20 × × 10 4 280 2.8 32.76 3.34  
20 × × 10 5 320 3.2 40.28 4.11  
20 × × 10 10 460 4.6 75.29 7.68  
20 × × 12 5 300 3.0 42.36 4.32  
20 × × 15 5 300 3.0 45.25 4.62  
L × W × H Surface magnetic flux density Adsorption power Remarks
mT kG N kgf
20 × × 18 7.5 440 4.4 73.80 7.53  
22 × × 21 5 290 2.9 54.41 5.55  
23 × × 23 10 330 3.3 119.81 12.23  
24 × × 24 12.5 420 4.2 160.53 16.38  
25.4 × × 9.6 9.6 400 4.0 85.55 8.73  
25.4 × × 25.4 12.7 400 4.0 224.36 22.89  
26 × × 20 6 330 3.3 71.09 7.25  
28 × × 13 4 330 3.3 41.41 4.23  
29.5 × × 4.15 2.15 250 2.5 28.80 2.94  
30 × × 10 8 420 4.2 85.15 8.69  
30 × × 30 5 300 3.0 76.18 7.77  
30 × × 30 10 400 4.0 154.77 15.79  
30 × × 30 10 400 4.0 154.77 15.79 1)
40 × × 11 6 350 3.5 93.25 9.52  
40 × × 15 5 300 3.0 83.96 8.57  
40 × × 40 10 400 4.0 203.37 20.75  
46 × × 30 10 400 4.0 200.21 20.43  
50 × × 10 2 200 2.0 60.56 6.18  
50.8 × × 50.8 12.7 400 4.0 328.21 33.49  
50.8 × × 50.8 12.7 400 4.0 328.21 33.49 2)
50.8 × × 50.8 25.4 480 4.8 690.66 70.48  
58 × × 14 3 240 2.4 92.94 9.48  
60 × × 30 10 380 3.8 250.42 25.55  
68 × × 4 8 320 3.2 101.01 10.31  
79.5 × × 4.5 1.5 180 1.8 102.99 10.51 3)

1) With holes for M3 countersunk screws 2) With holes for M5 countersunk screws 3) Limited to stock
* Surface magnetic flux density and suction force are reference values.

Bar type (square type)

Neodymium magnet bar type (square type)
Unit: mm
W × H × L Surface magnetic flux density Adsorption power
mT kG N kgf
0.6 × × 2 7 300 3.0 0.57 0.06
4 × × 4 12 450 4.5 8.92 0.91
4 × × 7.5 12 440 4.4 16.39 1.67
5 × × 5 10 400 4.0 13.48 1.38

* Surface magnetic flux density and suction force are reference values.

Ball type

neodymium magnet ball type
Unit: mm
OD surface treatment Surface magnetic flux density Remarks
mT kG
3f Gold plate 320 3.2  
5f Gold plate 450 4.5  
8f Gold plate 550 5.5  
10f Gold plate 580 5.8  
15f Gold plate 650 6.5  
3f Ni plating 320 3.2 1)
5f Ni plating 450 4.5  
8f Ni plating 550 5.5  
10f Ni plating 580 5.8  
15f Ni plating 650 6.5  

1) With 1.2φ hole Stock is limited.
The surface magnetic flux density is a reference value.