MMT rare-earth magnets
MMT magnet types
Hysteresis characteristics
Magnetic parameters
Electric and calorimetric parameters
Mechanical parameters
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MAGNET TYPE
RANGE
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Typical sizes of rare earth
permanent magnets produced by MMT Company
MMT Company produces rare earth permanent magnets
based on Nd-Fe-B alloys with different configurations (see
Photo). A complete list of sizes and magnetic properties are
given in Technical specification ÒÓ
3498-002-18785310-2003 «Sintered
permanent magnets based on iron alloys containing neodymium
and boron». A
few examples are shown in the following tables:
| Rings (segments) with axial grain orientation. |
 |
|
|
 |
¹ |
D1,
mm |
D2,
mm |
H,
mm |
k,
degrees. |
| 1 |
19 |
5.2 |
2 |
360 |
| 2 |
26 |
21 |
4 - 8 |
360 |
| 3 |
38 |
26 |
15 - 12 |
360 |
| 4 |
40 |
20,5 |
4 - 8 |
360 |
| 5 |
50 |
20 |
5 - 8 |
360 |
| 6 |
50,5 |
10 |
5 - 8 |
360 |
| 7 |
70 |
20 |
15 - 40 |
360 |
| 8 |
96 |
55 |
5 - 10 |
30 |
| 9 |
96 |
48 |
5 - 12 |
45 |
| 10 |
10 - 19 |
4 - 6 |
1.5 - 2 |
360 |
| 11 |
5 - 10 |
3 - 6 |
1.2 - 2 |
360 |
| Rings (segments) with radial structure. |
|
|
|
 |
¹ |
D1, mm |
D2, mm |
H, mm |
k, degrees. |
| 1 |
210 |
180 |
10 - 20 |
30 |
| 2 |
180 |
152 |
10 - 20 |
30 |
| 3 |
135 |
100 |
10 - 20 |
30 |
| 4 |
130 |
100 |
8 - 16 |
45 |
| 5 |
130 |
44 |
15 - 30 |
30 |
| 6 |
120 |
100 |
8 -16 |
45 |
| 7 |
100 |
70 |
8 - 16 |
45 |
| 8 |
70 |
55 |
8 - 16 |
45 |
| 9 |
70 |
44 |
8 - 16 |
60 |
| 10 |
49,5 |
32 |
20 - 48 |
60 |
| 11 |
54.5 |
46.5 |
20 - 40 |
30 |
| Disks with axial grain orientation. |
|
|
|
 |
¹ |
D1,
mm |
D2,
mm |
H,
mm |
k,
degrees. |
| 1 |
5 |
— |
2 - 10 |
360 |
| 2 |
9 |
— |
2 - 10 |
360 |
| 3 |
14.5 |
— |
2 - 10 |
360 |
| 4 |
15 |
— |
2 - 10 |
360 |
| 5 |
25 |
— |
2 - 10 |
360 |
| 6 |
40 |
— |
4 - 12 |
360 |
| 7 |
48 |
— |
8,5 |
360 |
| 8 |
64 |
— |
10 |
360 |
| 9 |
70 |
— |
10 |
360 |
| 10 |
2 - 5 |
— |
1.2 - 4 |
360 |
| Disks and rods with diametrical grain orientation. |
|
|
|
 |
¹ |
D1, mm |
D2, mm |
H, mm |
k, degrees. |
| 1 |
5 |
— |
2 - 10 |
360 |
| 2 |
7.8 |
— |
5 - 40 |
360 |
| 3 |
8.8 |
— |
5 - 40 |
360 |
| 4 |
11.5 |
— |
14 - 40 |
360 |
| 5 |
2 - 5 |
— |
1.2 - 12 |
360 |
| Rectangular bars. |
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|
 |
a)
70 - 15õ50 - 10õ15 - 6 (mm) — grain orientation (magnetization)
directed along the least size |
| b)
10 - 15õ5 - 10õ6 - 4 (mm) — grain orientation (magnetization)
directed along the least size |
| c) 2 -
10õ1.5 - 5õ4 - 1 (mm) — grain orientation (magnetization)
directed along the least size |
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