Specification of Magnets >> SmCo Magnet

SmCo Standard Products

Round Type
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Ring Type
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Bar Type
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Square Type

Diametrically Magnetized Type
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Segment C Type

SmCo magnets are made of samarium and cobalt and other rare-earth elements. As part of the rare earth group of permanent magnets, SmCo magnets typically fall into two families of materials. They include rare earth Sm1Co5 and Sm2Co17 and are referred to as 1:5 and 2:17 materials.

SmCo magnets have special advantages. Besides its better corrosion & oxidation resistance, SmCo magnets have better temperature stability. SmCo magnets can be operated at higher temperature up to 300℃.

Samarium Cobalt magnets are highly resistant to corrosion and require no special surface treatment. This makes Samarium Cobalt an excellent choice for compact designs where high temperature environments may be present.

Smco magnets come in six types: round type, ring type, bar type, square type, diametrically magnetized type, and segment c type. Both types have the special advantages.

Round Type

OD × H	Surface magnetic flux density		magnetic absorption
OD × H	kG	mT	kg
2 Φ × 2	2.8	280	0.08
3 Φ × 1	1.8	180	0.08
3 Φ × 1.5	2.0	200	0.1
3 Φ × 2	2.6	260	0.12
3 Φ × 3	2.8	280	0.15
3 Φ × 4	3.0	300	0.18
3.5 Φ × 2	2.6	260	0.16
3.9 Φ × 2.5	2.9	290	0.22
4 Φ × 0.8	1.5	150	0.1
4 Φ × 0.9	1.8	180	0.12
4 Φ × 1.5	2.0	200	0.13
4 Φ × 2	2.6	260	0.2
4 Φ × 3	3.0	300	0.24
4 Φ × 3.5	3.1	310	0.28
4 Φ × 4	3.3	330	0.32
4 Φ × 5	3.5	350	0.35
5 Φ × 1	1.8	180	0.14
5 Φ × 1.5	2.0	200	0.15
5 Φ × 2	2.5	250	0.26
5 Φ × 3	3.0	300	0.35
5 Φ × 4	3.2	320	0.43
5 Φ × 5	3.5	350	0.5
5.9 Φ × 3.5	3.0	300	0.37
6 Φ × 2	2.2	220	0.32
6 Φ × 3	2.6	260	0.36
6 Φ × 4	3.1	310	0.4
6 Φ × 5	3.5	350	0.5
6 Φ × 6	3.6	360	0.55

1) Ni plated

The surface magnetic flux density and the magnetic absorption are values for reference

OD × H	Surface magnetic flux density		magnetic absorption
OD × H	kG	mT	kg
7 Φ × 3	2.8	280	0.61
8 Φ × 2	2.4	240	0.6
8 Φ × 2.8	2.7	270	0.75
8 Φ × 5	3.0	300	1.2
1) 8 Φ × 5	3.0	300	1.2
8 Φ × 8	3.6	360	1.45
9 Φ × 2	1.8	180	0.5
9 Φ × 3	2.2	220	0.66
9.5 Φ × 1. 5	1.5	150	0.4
9.5 Φ × 2	1.8	180	0.45
10 Φ × 2	1.8	180	0.65
10 Φ × 3	2.5	250	1.1
10 Φ × 3.5	2.7	270	1.2
10 Φ × 5	3.0	300	1.4
10 Φ × 6	3.5	350	1.6
10 Φ × 8	3.8	380	1.9
11 Φ × 1.5	1.6	160	0.8
12 Φ × 3	2.2	220	1.3
12 Φ × 8	3.8	380	3.2
12.5 Φ × 1.5	1.5	150	0.83
13.5 Φ × 10	4.2	420	4.2
15 Φ × 3	2.0	200	1.76
15 Φ × 5	3.0	300	3.25
15 Φ × 10	4.0	400	4.2
15.5 Φ × 3.9	2.4	240	2.5
17 Φ × 3	2.6	260	3.0
17.5 Φ × 3.5	2.7	270	3.1
17.5 Φ × 5	3.0	300	3.4
20 Φ × 5	2.5	250	4.0
25 Φ × 9	3.7	370	7.0

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Ring Type

OD × ID × H	Surface magnetic flu× density		magnetic absorption
OD × ID × H	kG	mT	kg
3 Φ × 1.8 Φ × 4	2.9	290	0.15
5 Φ × 3.2 Φ × 3	2.5	250	0.2
6.5 Φ × 2 Φ × 1.5	2.0	200	0.2
6.5 Φ × 2 Φ × 2	2.2	220	0.25
8 Φ × 0.6 Φ × 1.5	1.8	180	0.35
9.5 Φ × 2.2 Φ × 1.4	1.5	150	0.26
10.5 Φ × 7.6 Φ × 1	1.1	110	0.3
13.2 Φ × 3 Φ × 1.5	1.5	150	1.0
14 Φ × 4 Φ × 3	2.5	250	1.4
14 Φ × 9 Φ × 8	3.3	330	2.6
16 Φ × 5 Φ × 3	2.0	200	1.46

The surface magnetic flux density and the magnetic absorption are values for reference

OD × ID × H	Surface magnetic flu× density		magnetic absorption
OD × ID × H	kG	mT	kg
17 Φ × 5 Φ × 2	1.8	180	1.48
17 Φ × 5 Φ × 5	2.5	250	2.4
19 Φ × 5.5 Φ × 2	1.8	180	1.9
20 Φ × 7 Φ × 4	2.5	250	2.9
30 Φ × 5 Φ × 5	2.5	250	7.0
30 Φ × 15.5 Φ × 5	2.5	250	5.7
36 Φ × 28 Φ × 5	2.4	240	6.3
40 Φ × 17.5 Φ × 3	2.0	200	7.1
46 Φ × 33 Φ × 2	2.0	200	6.2
60 Φ × 32 Φ × 7	3.0	300	29.0
64 Φ × 47 Φ × 15	3.5	350	35.0

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Bar Type

OD × L	Surface magnetic flu× density		magnetic absorption
OD × L	kG	mT	kg
2.5 Φ × 5	3.7	370	0.2
3 Φ × 5	3.7	370	0.26
3 Φ × 9	3.2	320	0.35
3.5 Φ × 6	4.0	400	0.32
4 Φ × 8.5	3.5	350	0.44
5 Φ × 10	4.0	400	0.6
5 Φ × 13	4.2	420	0.7

OD × L	Surface magnetic flu× density		magnetic absorption
OD × L	kG	mT	kg
5 Φ × 25	3.3	330	1.7
6 Φ × 8	3.7	370	0.7
6 Φ × 9.5	4.0	400	0.8
7 Φ × 8	3.8	380	1.3
8 Φ × 10	3.8	380	1.8
22.5 Φ × 25	4.2	420	12

The surface magnetic flux density and the magnetic absorption are values for reference

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Square Type

L × W × H	Surface magnetic flu× density		magnetic absorption
L × W × H	kG	mT	kg
1) 1.2 × 1.2 × 2	1.8	180	0.05
1) 3 × 2 × 0.7	1.2	120	0.08
4 × 4 × 2	2.5	250	0.25
6 × 6 × 1.5	2.3	230	0.4
6 × 6 × 2	2.5	250	0.44
9 × 2.5 × 3.9	3.0	300	0.47
10 × 6.5 × 4	3.2	320	0.83
11 × 7 × 8	3.5	350	1.86
12 × 7 × 3	2.6	260	1.1
14 × 2 × 1	1.4	140	0.21
14.5 × 10 × 4.5	2.8	280	2.5
15 × 5 × 3	2.6	260	1.1
15 × 10 × 4	2.8	280	2.4
15 × 10 × 5	3.0	300	2.5
20 × 5 × 12	3.6	360	2.2
20 × 10 × 5	3.0	300	4

L × W× H	Surface magnetic flu× density		magnetic absorption
L × W× H	kG	mT	kg
20 × 12 × 5	3.0	300	4.4
20 × 15 × 5	2.6	260	4.3
20 × 20 × 10	3.0	300	7.2
25 × 15 × 1.5	1.2	120	1.3
25 × 15 × 3	1.7	170	2.4
26 × 8 × 4	2.8	280	2.6
30 × 16 × 5	2.5	250	6.8
38 × 38 × 18	3.2	320	32
38 × 38 × 24.5	3.8	380	43
50 × 30 × 12	3.5	350	40
58 × 14 × 6	2.7	270	12
60 × 60 × 12	3.3	330	50
77 × 32 × 24	3.7	370	56