Great Magtech (Xiamen) Electric Co., Ltd is one of the most reliable manufacturers and suppliers of permanent cast alnico magnets with customized shape in China. We warmly welcome you to wholesale high quality permanent cast alnico magnets with customized shape from our factory. Good service and reasonable price are available.
Among those famous cast alnico magnets manufacturers, it is a professional supplier in China, welcome to wholesale alnico magnet for guitar pickup, alnico 5 magnets, alnico permanent magnets, alnico v magnets, alnico bar magnets from our factory.
Customized Cast Alnico Magnets
Alnico material is comprised of aluminum, nickel, cobalt and iron with varying additions of other elements. There are two different manufacturing processes for Alnico: Cast and sintered.
Cast Alnico magnets can be made into many shapes and sizes during manufacturing process by using the casting processing method. Cast Alnico magnets are manufactured by pouring the molten metal alloy of Alnico into a mold and then further processing it through heat treated and cooled alternatively. The solidified material has a dark gray appearance on the exterior and may be roughly ground. Magnets that have been polished using machines, may have a shiny gray surface similar to that of steel.
Specification
| Dimension |
Tolerance |
|
Up to 1" Up to 25.4 mm |
±1/64" .40 mm |
|
1" to 3" 25.4 to 76.2 mm |
±1/32" .81 mm |
|
3" to 5" 76.2 to 127.0 mm |
±3/64" 1.19 mm |
|
5" to 7" 127.0 to 177.8 mm |
±1/16" 1.59 mm |
|
7" to 9" 177.8 to 228.6 mm |
±5/64" 1.98 mm |
Advantages of Alnico Magnets
· Cast Alnico offers a near net shape.
· Cast alnico can be produced to complex shapes with complex magnetic patterns.
· Alnico Br as high as NdFeB at room temperature.
· Can be used up to 450-550 degrees C (842-932F).
· Least variation in magnetic output with temperature change of any magnetic material.
· Can be cast in very large sizes.
Production Properties:
|
Magnetic Property Parameters of Sintered Alnico |
|||||||||||||
|
Grades |
Equivalent MMPA Class |
Remanence |
Coercive Force |
Coercive Force |
Maximum Energy Product |
Dens ity |
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 |
Our regular sizes for reference:
|
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: |
|||
| 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
If you feel that the tone of your electric guitar is not right, the problem may be the magnet of the pickup. It is like the skeleton of the sound, determining the basic character of the sound. This table will help you quickly understand the tonal characteristics of different types of Alnico magnets.
| 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, watermeters, electricity meters, switches, Adhesion, Loudspeakers, Port machines, Musical instruments, Magnetic chucks, education, Magnetic Bases, etc.
The Application of Alnico in Pickups：
Alnico magnets, due to their excellent magnetic properties and stability, are a key material choice for pickups. Specifically in guitar pickups, AlNiCo magnets deliver a clear, detailed sound while maintaining strong magnetic field stability. Compared to other magnetic materials, Alnico magnets offer greater resistance to temperature fluctuations, ensuring consistent pickup performance in a variety of environments. These magnets enable pickups to effectively capture subtle audio signals, imparting richer tonal color and dynamics to instruments. They are particularly well-suited for vintage-inspired music and pickup designs requiring high sensitivity.
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