Ferrite magnet

Anisotropic ferrite magnet

Ferrite magnets have a high coercive force, so there is no demagnetization.Since it is a boiled magnet (ceramic magnet), it has excellent corrosion resistance and is suitable for flat molds, but on the other hand, it has the disadvantage of being easily cracked.In addition to conventional audio speakers and headphones, the demand for automobile motors and generators is further increasing due to the weight reduction (one-half to one-third of the conventional one) due to technological innovation.Since ferric oxide, which is a raw material, is abundant, it can be provided at the lowest price among current magnets.It can be divided into two types: anisotropic ferrite magnets (Anisotropic Sr-Ferrite) and isotropic ferrite magnets (Isotropic Ba-Ferrite).

Round shape

Unit: mm

OD x H Remarks
1.5φ x 3  
2φ x 3  
2.3φ x 2.8  
2.3φ x 4.5  
3φ x 3  
3.2φ x 5  
3.5φ x 3.5  
4φ x 2  
5φ x 2  
5φ x 3  
5φ x 8  
6φ x 2  
6φ x 5  
6.35φ x 6.35  
7φ x 2  
7φ x 4  
7φ x 5  
8φ x 2  
OD x H Remarks
8φ x 3  
8φ x 5  
9φ x 3  
10φ x 3  
10φ x 4  
10φ x 5  
10φ x 7  
10φ x 10  
11φ x 5  
12φ x 4  
12.5φ x 3.8  
13φ x 5  
13φ x 6.5  
15φ x 4  
15φ x 5.2  
15φ x 8  
15φ x 10  
17φ x 3  
OD x H Remarks
17φ x 4  
18φ x 8  
20φ x 3  
20φ x 4  
20φ x 5  
20φ x 7  
20φ x 10  
20φ x 15  
22φ x 25.4  
25φ x 4  
25φ x 6  
29.5φ x 11  
30φ x 5  
30φ x 8  
30φ x 10  
30φ x 13.5  
38φ x 10  
50φ x 10  

Round type (type with R)

Unit: mm

OD x H
15φ x 6R

Ring type

Unit: mm

OD x ID x H
6φ x 2φ x 2.5
8φ x 3.5φ x 4.5
10φ x 3φ x 2
12φ x 5φ x 4
12.5φ x 5.3φ x 6
13.5φ x 5φ x 2
14φ x 8φ x 3
15φ x 6.1φ x 10
17.5φ x 7φ x 3
17.5φ x 10.8φ x 5
19φ x 6.5φ x 10
20φ x 8φ x 4
20φ x 8φ x 8
20φ x 10φ x 3
20.5φ x 7.5φ x 3.6
21φ x 12φ x 4.5
OD x ID x H
23φ x 6.5φ x 3.7
23.5φ x 15.6φ x 4
25φ x 8φ x 6
29φ x 10φ x 3.5
29φ x 10φ x 5
29.6φ x 18φ x 2.7
30φ x 9φ x 6
30φ x 12.5φ x 5
32φ x 8.5φ x 5
35.6φ x 14φ x 6
36φ x 18φ x 8
37φ x 14φ x 6
39φ x 22φ x 7
42φ x 19φ x 3
45φ x 22φ x 6
45φ x 22φ x 8
OD x ID x H
45φ x 22φ x 10.5
50φ x 16φ x 10
56φ x 45.3φ x 19
60φ x 32φ x 7
60φ x 32φ x 8
60φ x 32φ x 10
70φ x 32φ x 8
70φ x 32φ x 10
70φ x 32φ x 15
75φ x 32φ x 10
80φ x 40φ x 7.9
80φ x 40φ x 10
80φ x 40φ x 12
85φ x 33φ x 22
90φ x 50φ x 16

Large ring type

It is now possible to manufacture a large ring type with a height (H), which has been considered difficult with anisotropic ferrite magnets.

Unit: mm

OD x ID x H
100φ x 32.5φ x 27.4
100φ x 60φ x 15
110φ x 50φ x 15
115φ x 44.5φ x 25.4
134φ x 75φ x 20
156φ x 80φ x 20
169φ x 81.2φ x 40
178φ x 88.9φ x 25.4
200φ x 86φ x 30
200φ x 120φ x 20
220φ x 110φ x 20
220φ x 110φ x 30

Square

Unit: mm

L × W × H
4 × × 4 2
7 × × 7 4
12 × × 8 2.5
12.5 × × 8.5 4.7
13.5 × × 5.5 2
15 × × 10 4
15 × × 15 5
18 × × 11.5 5
18.5 × × 6 3
20 × × 10 4
20 × × 10 5
20 × × 12 5
20 × × 15 7
20 × × 20 10
23 × × 22 8
24 × × 10 4
25 × × 6 4
25 × × 8 5
25 × × 15 7
25 × × 19 4.5
25 × × 19 5
25.5 × × 25.5 3
27 × × 8.5 4
27 × × 14.5 7
30 × × 6 4
L × W × H
30 × × 9 6
30 × × 10 5
30 × × 10 10
30 × × 20 5
30 × × 30 10
34 × × 8 5
34 × × 34 10
35 × × 15 4.5
40 × × 12 6
40 × × 12 8
40 × × 25 4.8
40 × × 25 10
40 × × 40 10
40 × × 40 12
40 × × 40 15
41.5 × × 4 3.3
48 × × 15 5
48 × × 22 10
50 × × 20 5
50 × × 50 12
50 × × 50 18
55 × × 4 4
55 × × 30 18
60 × × 30 5
L × W × H
60 × × 30 10
63 × × 14 10
63.5 × × 19 5
65 × × 15 25.4
68 × × 18 12
75 × × 30 25.4
80 × × 80 20
90 × × 34 20
96 × × 10 3
100 × × 15 5
100 × × 35 5
100 × × 50 10
100 × × 63.5 17
100 × × 100 3
100 × × 100 4
100 × × 100 5
100 × × 100 6
100 × × 100 7
100 × × 100 8
100 × × 100 10
150 × × 26 15
150 × × 100 15
150 × × 100 20
150 × × 100 25.4

Bar type (square type)

Unit: mm

W × H × L
3 × × 3 7
4 × × 10 20
6 × × 6 18
7 × × 7 12
9.75 × × 9.75 25.4

Square type (with holes)

Unit: mm

L × W × H × [ID] Remarks
8 x 8 x 7 (2.5φ)  
12 x 9 x 5 (3φ)  
20 x 12 x 4 (6.5φ)  
22 x 16 x 5 (5φ)  
24.6 x 14.7 x 3 (3.3φ) With step hole
25 x 19 x 4.5 (5φ) With step hole (2)
30 x 18 x 6 (4.5φ)  
40 x 25 x 5.2 (5φ) With step hole (1)
40 x 40 x 10 (12φ)  
85 x 65 x 18 (9φ)  

Square type (with 2 holes)

Unit: mm

L × W × H × [ID] Remarks
48 x 22.5 x 10 (5φ x 2) With countersunk hole
60 x 30 x 10 (7φ x 2) Through hole (not countersunk hole shape)

Super Usu type

Unit: mm

OD x H
3.8φ x 0.53
5φ x 1
13φ x 1.2
15φ x 1.2
19φ x 1.2
20φ x 1.2

Segment type (C type)

Unit: mm

Custom size production is possible.Please contact us.