Great Magtech (Xiamen) Electric Co., Ltd is one of the most reliable manufacturers and suppliers of permanent sintered alnico magnets for odometer of automobile in China. We warmly welcome you to wholesale high quality permanent sintered alnico magnets for odometer of automobile from our factory. Good service and reasonable price are available.
Among those famous sintered alnico magnets manufacturers, it is a professional supplier in China, welcome to wholesale alnico pickup magnets, alnico speaker magnet, pick up 5 magnets, horseshoe magnet, pickup magnets from our factory.
Customized Sintered Alnico Magnets
Sintered Alnico magnets are formed by compacting fine Alnico powder in a press and then sintering the compacted powder into a solid magnet. The powdered mixture of contents is pressed into a die under tons of pressure. It is then sintered in a hydrogen atmosphere at 2300°F and then cooled – either within a magnetic field or without a magnetic field. When cooled within the magnetic field, it is known as an anisotropic magne,t and when cooled outside of a magnetic field, it is called an isotropic magnet. The sintering process is well-suited to large-volume production.
Specification
| Dimension |
Tolerance |
|
Up to 0.125" Up to 3.18 mm |
±.005" .13 mm |
|
0.126" to 0.625" 3.20 to 15.88 mm |
±.010" .25 mm |
|
0.626" to 1.250" 15.90 to 31.75 mm |
±.015" .38 mm |
Advantages and Disadvantages of Alnico Magnets
· Alnico Br is as high as NdFeB at room temperature.
· Can be used up to 450-550 degrees C (842-932°F).
· Least variation in magnetic output with temperature change of any magnetic material.
· Can be cast in very large sizes.
· Sintered alnico is usually limited to small to medium sizes and simpler shapes.
· Low coercivity (Hci) makes them easy to demagnetise.
· Complex cast alnico sometimes needs sand mold tooling, which can be expensive if existing tooling is not available.
Production Properties:
|
Magnetic Property Parameters of Sintered Alnico |
||||||||||||||
|
Grades |
Equivalent MMPA Class |
Remanence |
Coercive Force |
Coercive Force |
Maximum Energy Product |
Density |
Reversible Temp. Coefficient |
Curie Temp. |
Temp. Coefficient |
|||||
|
Br |
Hcb |
Hcb |
(BH)max |
g/cm3 |
α(Hcj) |
TC |
TW |
|||||||
|
mT |
Gs |
KA/m |
Oe |
KA/m |
Oe |
KJ/m3 |
MGOe |
%/°C |
°C |
°C |
||||
|
SLN8 |
Alnico3 |
520 |
5200 |
43 |
540 |
40 |
500 |
8-10 |
1.0-1.25 |
6.8 |
-0.02 |
760 |
450 |
|
|
SLNG12 |
Alnico2 |
700 |
7000 |
43 |
540 |
40 |
500 |
12-14 |
1.5-1.75 |
7 |
-0.014 |
810 |
450 |
|
|
SLNGT18 |
Alnico8 |
600 |
6000 |
107 |
1350 |
95 |
1200 |
18-22 |
2.25-2.75 |
7.2 |
-0.02 |
850 |
550 |
|
|
SLNGT28 |
Alnico6 |
1000 |
10000 |
57 |
710 |
56 |
700 |
28-30 |
3.5-3.8 |
7.2 |
-0.02 |
850 |
525 |
|
|
SLNG34 |
Alnico5 |
1100 |
11000 |
51 |
640 |
50 |
630 |
34-38 |
3.5-4.15 |
7.2 |
-0.016 |
890 |
525 |
|
|
SLNGT31 |
Alnico8 |
780 |
7800 |
106 |
1130 |
104 |
1300 |
33-36 |
3.9-4.5 |
7.2 |
-0.02 |
850 |
550 |
|
|
SLNGT38 |
800 |
8000 |
126 |
1580 |
123 |
1550 |
38-42 |
4.75-5.3 |
7.2 |
-0.02 |
850 |
550 |
||
|
SLNGT42 |
880 |
8800 |
122 |
1530 |
120 |
1500 |
42-48 |
5.3-6.0 |
7.25 |
-0.02 |
850 |
550 |
||
|
SLNGT38J |
Alnico8HC |
730 |
7300 |
163 |
2050 |
151 |
1900 |
38-40 |
4.75-5.0 |
7.2 |
-0.02 |
850 |
550 |
|
|
Alnico Magnets - Physical Properties |
|||
|
Property |
Units |
Value Sintered Alnico |
Value Cast Alnico |
|
Vickers Hardness |
Hv |
440 |
440-620 |
|
Density |
g/cm3 |
6.8 - 7.0 |
6.9 - 7.3 |
|
Curie Temp TC |
°C |
810 - 860 |
740 - 860 |
|
Curie Temp TF |
°F |
1,400 - 1,580 |
1,460 - 1,580 |
|
Specific Resistance |
μΩ·Cm |
50- 70 |
45 - 75 |
|
Bending Strength |
kN/mm2 |
0.35 - 0.76 |
0.05 - 0.31 |
|
Tensile Strength |
kN/mm2 |
0.35- 0.45 |
0.02 - 0.15 |
|
Thermal Expansion |
°C-1 |
+11.0 to +12.4 x10-6 |
+11.0 to +13.0 x10-6 |
|
Note: |
|||
Our regular sizes for reference
| Cylinder | |||
|
Grade |
Dimensions |
Application |
|
|
A(mm) |
B(mm) |
||
|
LNG40 |
1.57 |
9.525 |
Micro-motors |
|
LNG40 |
1.7 |
12 |
Micro-motors |
|
LNG40 |
3.175 |
12.7 |
Micro-motors |
|
LNG40 |
4 |
15 |
Sensors |
|
LNG40 |
5 |
10/15/17/18/20/25.4 |
Sensors |
|
LNG40 |
6 |
25/30/100 |
Sensors |
|
LNG40 |
6.35 |
25.4/31.75 |
Sensors |
|
LNG40 |
7 |
30 |
Sensors |
|
LNG40 |
8 |
20/25/30/50/150 |
Sensors |
|
LN10 |
9 |
5 |
Sensors |
|
LNG40 |
9.525 |
25.4/38.1/63.5 |
Sensors |
|
LNG40 |
10 |
10/12/15/30/140 |
Sensors |
|
LNG52 |
10 |
28 |
Sensors |
|
LN10 |
10.4 |
8 |
Meters |
|
LNG40 |
11 |
50 |
Sensors |
|
LNG40 |
12 |
30/50 |
Sensors |
|
LNG40 |
12.7 |
50.8/76.2 |
Cows |
|
LNG40 |
25 |
20 |
Assembly |
|
LNG52 |
38 |
16 |
Balances |
|
Ring |
|||
|
Grade |
Dimensions |
Applications |
|
|
A(mm) |
B(mm) |
||
|
LN10 |
23 |
4 |
Odometers |
|
LN10 |
25 |
5 |
Odometers |
|
LN10 |
23 |
3.5 |
Odometers |
|
LNG13 |
51 |
5 |
Meters |
|
LNG13 |
218 |
10 |
Port Machines |
|
LN10 |
142 |
9 |
Port Machines |
|
LNG40 |
101.6 |
40 |
Speakers |
|
LNG40 |
50.8 |
25.4 |
Motors |
|
LNG40 |
101.6 |
38.1 |
Speakers |
|
Block1 |
||||||
|
Grade |
Dimensions |
Application |
||||
|
A |
B |
C |
D |
E |
Blenders |
|
|
LNG37 |
42 |
20 |
30 |
10 |
Meters |
|
|
LNG37 |
55 |
11 |
13.4 |
16 |
Education |
|
|
LNG37 |
28.6 |
7.6 |
25.4 |
8 |
Holding |
|
|
LNG37 |
30 |
20 |
20 |
7.5 |
D5 |
Holding |
|
LNG37 |
45 |
30 |
30 |
11 |
D5 |
Holding |
|
LNG37 |
25.4 |
15.9 |
5.6 |
D4.8 |
Holding |
|
|
LNG37 |
19.05 |
12.7 |
5.6 |
D4.8 |
Holding |
|
|
LNG37 |
31.75 |
25.4 |
7.94 |
D7.1 |
Holding |
|
|
LNG37 |
40 |
25 |
25 |
10 |
Holding |
|
|
LNG37 |
39.6 |
25.4 |
25.4 |
10.3 |
D5.5 |
Holding |
|
LNG37 |
63.5 |
47.6 |
46 |
14.3 |
D4.8 |
Holding |
|
LNG37 |
69.8 |
57.1 |
41.3 |
14.3 |
2XD7.9 |
Holding |
|
LNG37 |
64 |
12 |
26 |
14 |
Holding |
|
|
LNG37 |
17 |
22 |
10 |
6.25 |
Meters |
|
|
LNG37 |
62 |
26 |
61 |
13 |
Education |
|
|
LNG37 |
21 |
13.1 |
16.2 |
6.2 |
Meters |
|
|
Block2 |
|||||
|
Grade |
Dimensions |
Application |
|||
|
A |
B |
C |
D |
||
|
LNG37 |
63.5 |
12.7 |
3.175 |
Musical Instruments |
|
|
LNG37 |
58 |
12.6 |
3 |
Musical Instruments |
|
|
LNG37 |
60 |
12.7 |
3 |
Musical Instruments |
|
|
LNG37 |
25.4 |
6.35 |
6.35 |
Sensors |
|
|
LNG37 |
22.5 |
4.3 |
4.3 |
Sensors |
|
|
LNG44 |
69 |
25 |
25 |
15 |
Magnetic Chucks |
|
LNG37 |
62 |
13 |
3 |
Musical Instruments |
|
|
LNG40 |
75 |
15 |
10 |
Education |
|
|
LNG37 |
19 |
3.2 |
3.2 |
Sensors |
|
|
LNG37 |
150 |
16 |
6 |
Education |
|
|
LNG40 |
25 |
22.5 |
7 |
Meters |
|
|
LNG40 |
25 |
22 |
7 |
R4 |
Meters |
|
LNG40 |
42 |
42 |
20 |
6.5 |
Magnetic Chucks |
|
LNG37 |
45 |
20 |
15 |
7 |
Magnetic Chucks |
|
LNG37 |
50 |
20 |
20 |
7 |
Magnetic Chucks |
|
LNGT72 |
50 |
50 |
40 |
Magnetic Chucks |
|
|
LNG52 |
45 |
24 |
15 |
Magnetic Chucks |
|
|
LNG52 |
45 |
22.5 |
15 |
Magnetic Chucks |
|
|
LNG44 |
59.5 |
59.5 |
25 |
11 |
Magnetic Chucks |
|
LNG40 |
45 |
18.5 |
30.5 |
Magnetic Bases |
|
|
LNG40 |
53 |
19.3 |
32 |
Magnetic Bases |
|
The Influence and Performance of Alnico Magnet on Tone
| The Influence and Performance of Alnico Magnet on Tone | |||
| Performance: | Alnico 2 | Alnico 5 | Alnico 3/8 |
| Characteristics | Low microphonic force, full midrange, and soft treble. | Stronger properties, brighter high frequencies, and medium output power | Alnico 3 has the weakest magnetism and is more versatile (used in some Telecaster neck pickup screens). |
| Tone | Warm and rounded, suitable for styles like blues and jazz (like Gibson's PAF pickups). | Clear and bright, with tight low frequencies, suitable for rock and pop (such as the classic sound of Fender Strat) | Alnico 8 has the strongest magnetism, high output, a strong modern feel, and is suitable for high-gain tones. |
| Dynamic Response |
Sensitive to picking force, wide dynamic range. | ||
| Strings vibrate more freely, sustaining longer, and expressing delicate dynamics. | |||
| Vintage tone: Alnico 2+ low-output coil (Gibson '57 Classic) | Modern clean: Alnico 5+ medium coil (Fender Custom Shop). | ||
| Magnet Shape: | |||
| Rod Magnet (E.G., Single Coil) | Evenly distributed magnetic field for bright tone. | ||
| Cylindrical Pole + Magnet (E.G., Double Coil) | A concentrated magnetic field for low noise and richer output. | ||
| Magnetic Pole Chamfering | High-frequency response can be fine-tuned (for custom shop pickups). | ||
| Other: | |||
| Pickup Height | The closer the magnet is to the strings, the greater the output, but this may cause pitch deviation (magnetic pull effect). | ||
| Circuit Design | Active pickups partially compensate for the magnet's characteristics by amplifying the signal through circuitry. | ||
| Summary | Warm, vintage-inspired - Alnico 23 | ||
| Balanced, versatile - Alnico 5 | |||
| Powerful output - Ceramic/NdFeB magnets | |||
| Actual listening is more important than specs, as the interaction between magnets, wire, and guitar is extremely complex. | |||
Applications:
Mainly used for a variety of meters, odometers, Sensors, Motors, multimeters, telephones, mobiles, water meters, electricity meters, switches, Adhesion, Loudspeakers, Port machines, Musical instruments, Magnetic chucks, education, Magnetic Bases, etc.
The Application of Alnico in Pickups：
Alnico alloys, due to their unique magnetic and high-temperature resistance, are widely used in pickups, particularly in electric guitar pickup designs. Alnico magnets have high residual induction and a low temperature coefficient, ensuring stable operation in varying temperature environments. They deliver clear, rich sound quality, making them particularly well-suited for audio equipment requiring warm tones and high output. Furthermore, the stability and durability of Alnico magnets enhance their high-frequency performance, making them a popular choice among music enthusiasts and professionals.
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Sintered Alnico magnets for DC Motor:
