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Manelco Magnets

Manelco Rare Earth Magnets (Neodymium Magnets)

You’ll find magnets in many everyday electronic devices. If an appliance has a motor in it, you’ll find a magnet. Televisions, computers, automobiles, loud speakers, cell phones, and microwave ovens, all use magnets. Magnets are used to keep kitchen cabinet doors closed, are part of the sensors in home alarm systems, are placed in cows stomachs to catch barbed wire and nails, are used in magnetic resonance imaging systems, are used to slow elevators, roller coasters and subways, and in countless other devices. Rare earth magnets are the strongest type of permanent magnet available today. Five to fifteen times the strength of common ceramic magnets, rare earth magnets can lift 500 times their own weight in steel. These magnets are primarily composed of neodymium, iron and boron (Nd2Fe14B) plated in nickel-copper-nickel for a shiny corrosion resistant finish. Amazingly powerful for their size, rare earth magnets have innumerable uses.

Material: Neodymium-Iron-Boron
Plating: Nickel-Copper-Nickel
Materrial Grade: N40 / N42
Material Residual Flux Density: 12800 Gauss (1.28 Tesla)
Material Coercive Force (Hcb): 11900 Oersteds (947 KA/mg)
Material Density: 7.5g/cm3


Manelco Rare Earth Magnets - Disc Shaped
MAG4001series
Part #

Description
(Diameter x Thickness)

1 Lot
2nd Break
3rd Break
4th Break
5th Break
MAG400103
0.125 x 0.031"
.18ea
.15ea@75
.13ea@150
.11ea@1500
.09ea@4500

MAG400105

0.125 x 0.063"
.29ea
.24ea@50
.21ea@100
.18ea@1000
.15ea@3000

MAG400110

0.250 x 0.063
.42ea
.36ea@40
.30ea@80
.26ea@800
.22ea@2400
MAG400115
0.250 x 0.100"
.43ea
.34ea@25
.27ea@50
.23ea@500
.20ea@1500
MAG400120
0.250 x 0.125"
.77ea
.65ea@20
.56ea@40
.47ea@400
.40ea@1200
MAG400125

0.375 x 0.063"
.52ea
.44ea@20

.38ea@40

.32ea@400
.27ea@1200
MAG400130

0.375 x 0.125"
1.00ea
.85ea@15
.73ea@30
.62ea@300
.53ea@900
MAG400135
0.375 x 0.250"
2.22ea
1.78ea@6
1.42ea@12
1.21ea@120
1.03ea@360
MAG400140
0.500 x 0.063"
.88ea
.74ea@12
.63ea@24
.54ea@240
.45ea@720
MAG400145
0.500 x 0.125"
1.47ea
1.25ea@7
1.06ea@14
.90ea@140
.77ea@420
MAG400150
0.500 x 0.250"
2.66ea
2.26ea@4
1.92ea@8
1.63ea@80
1.39ea@240
MAG400155
0.500 x 0.375"
4.38ea
3.72ea@4
3.16ea@8
2.69ea@80
2.28ea@240
MAG400160
0.625 x 0.125"
2.59ea
2.20ea@4
1.89ea@8
1.59ea@80
1.35ea@240
MAG400165
0.750 x 0.063"
2.17ea
1.85ea@6
1.57ea@12
1.33ea@100
1.13ea@300
MAG400170
0.750 x 0.125"
3.78ea
3.21ea@4
2.73ea@8
2.32ea@80
1.97ea@240
MAG400175
0.750 x 0.250"
5.80ea
4.94ea@4
4.20ea@8
3.57ea@80
3.03ea@240
MAG400180

0.875 x 0.125"

5.36ea
4.56ea@4
3.87ea@8
3.29ea@80
2.80ea@240
MAG400185
1.00 x 0.063"
3.08ea
2.62ea@4
2.23ea@8
1.89ea@80
1.61ea@240

MAG400190

1.00 x 0.125"
5.32ea
4.52ea@4
3.84ea@8
3.27ea@80
2.78ea@240

MAG400193

1.00 x 0.250"

9.26ea

7.41ea@4
5.93ea@8
5.04ea@80
4.28ea@240
MAG400195
2.00 x 0.500"
79.20ea@1
67.32ea@5
57.22ea@15
51.50ea@45
46.35ea@135

Manelco Rare Earth Magnets - Rod Shaped
MAG4002 series
Part #

Description
(Dimater x Length)

1 Lot
2nd Break
3rd Break
4th Break
5th Break
MAG400203
0.125 x 0.100"
.32ea
.27ea@50
.23ea@100
.20ea@1000
.17ea@3000
MAG400205
0.125 x 0.125"
.32ea
.27ea@50
.23ea@100
.20ea@1000
.17ea@3000

MAG400210

0.125 x 0.250"
.40ea
.32ea@25
.26ea@50
.22ea@500
.19ea@1500
MAG400215
0.125 x 0.375"
1.11ea
.89ea@20
.71ea@40
.60ea@400
.51ea@1200
MAG400220
0.125 x 0.500"
1.74ea
1.39ea@15
1.11ea@30
.94ea@300
.80ea@900
MAG400225
0.125 x 0.100"
4.65ea
3.72ea@7
2.98ea@14
2.53ea@140
2.15ea@420
MAG400230
0.250 x 0.250"
1.40ea
1.19ea@10
1.01ea@20
.86ea@200
.73ea@600
MAG400235
0.250 x 0.500"
2.52ea
2.14ea@5
1.82ea@10
1.58ea@100
1.32ea@300
MAG400240
0.250 x 0.750"
5.81ea
4.65ea@4
3.72ea@8
3.16ea@80
2.69ea@240
MAG400245
0.250 x 1.00"
9.27ea
7.41ea@4
5.93ea@8
5.04ea@80
4.28ea@240
MAG400250
0.375 x 0.375"
2.31ea
1.96ea@4
1.67ea@8
1.42ea@80
1.21ea@240
MAG400255
0.500 x 0.500"
5.45ea
4.64ea@4
3.54ea@8
3.35ea@80
2.55ea@240
MAG400260
0.500 x 1.00"
11.00ea
8.80ea@4
7.04ea@8
5.98ea@80
5.08ea@240

Manelco Rare Earth Magnets - Block Shaped
MAG4003 series
Part #
Description
(Length x Width x Thickness)
1 Lot
2nd Break
3rd Break
4th Break
5th Break
MAG400310
0.250 x 0.250 x 0.100"
.78ea
.65ea@25
.56ea@50
.48ea@500
.40ea@1500
MAG400320
0.500 x 0.500 x 0.125"
2.73ea
2.32ea@6
1.97ea@12
1.68ea@120
1.43ea@300
MAG400330
0.750 x 0.750 x 0.125
5.46ea
4.64ea@6
3.95ea@12
3.35ea@120
2.85ea@360
MAG400335
0.875x0.375x0.250"
5.25ea
4.46ea@6
3.79ea@12
3.23ea@120
2.74ea@360
MAG400340
0.250 x 1.00 x 0.100"
2.03ea
1.73ea@6
1.47ea@12
1.25ea@120
1.06ea@360
MAG400350
1.00 x 1.00 x 0.125"
7.56ea
6.43ea@6
5.46ea@12
4.64ea@120
3.95ea@360
MAG400360
0.500 x 2.00 x 0.125"
7.63ea
6.49ea@6
5.51ea@12
4.69ea@120
3.98ea@360
MAG400363
2.00 x 0.500 x 0.250"
16.62ea
13.30ea@6
10.64ea@12
9.04ea@120
7.68ea@360
MAG400365
3.00 x 0.500 x 0.250"
25.91ea
20.73ea@6
16.58ea@12
14.09ea@120
11.98ea@360
MAG400370
2.00" x 2.00" x 0.500"
63.00ea
50.50ea@5
45.30ea@15
MAG400380
2.00" x 2.00" x 0.750"
135.36ea
115.05ea@5
97.80ea@15
88.00ea@45
79.20ea@135

Manelco Rare Earth Magnets - Cube Shaped
MAG4004 series
Part #

Description
(Length x Width x Thickness)

1 Lot
2nd Break
3rd Break
4th Break
5th Break
MAG400410
0.125 x 0.125 x 0.125"
.23ea
.18ea@50
.14@100
.12ea@1000
.10ea@3000
MAG400420
0.187 x 0.187 x 0.187"
.56ea
.48ea@25
.41ea@50
.34ea@500
.29ea@1500
MAG400430
0.250 x 0.250 x 0.250"
1.25ea
1.00ea@10
.80ea@20
.68ea@200
.58ea@600
MAG400440
0.500 x 0.500 x 0.500"
4.70ea
3.76ea@6
3.01ea@12
2.56ea@120
2.18ea@360

Manelco Rare Earth Magnets - Ring Shaped
MAG4005 series
Part #
Description
(Outside Diamter x Inside Diamter x Thickness)
1 Lot
2nd Break
3rd Break
4th Break
5th Break
MAG400503

13mm x (5mm hole) x 1mm
0.511 x (0.197 hole) x 0.039"

.54ea
.43ea@25
.34ea@50
.29ea@500
.25ea@1500
MAG400505

13mm x (9mm hole) x 1mm
0.511 x (0.354 hole) x 0.039"

.54ea
.43ea@25
.34ea@50
.29ea@500
.25ea@1500
MAG400510
0.500 x (0.250 hole) x 0.125"
1.47ea
1.25ea@6
1.06ea@12
.90ea@120
.77ea@360
MAG400515 (NLA)

0.500 x (0.143 hole) x 0.125"

2.34ea
1.87ea@6
1.50ea@12
1.28ea@120
1.09ea@360
MAG400525
0.750 x (0.370 hole) x 0.125"
3.15ea
2.65ea@6
2.20ea@12
1.85ea@120
1.60ea@360
MAG400526
0.750 x (0.375 hole) x 0.125"
3.15ea
2.65ea@6
2.20ea@12
1.85ea@120
1.60ea@360
MAG400530
0.750 x (0.125 hole) x 0.375"
6.30ea
5.04ea@6
4.03ea@12
3.65ea@120
3.25ea@360
MAG400535
0.750 x (0.200 hole) x 0.125"
3.22ea
2.74ea@6
2.33ea@12
1.98ea@120
1.68ea@360
MAG400550
1.00 x (0.500 hole) x 0.125 "
4.65ea
3.70ea@6
3.00ea@12
2.55ea@120
2.25ea@360
MAG400520

.500 x (0.150 / 0.275 beveled hole) x 0.125"
(Countersunk Ring)
1.61ea
1.37ea@6
1.16ea@12
.99ea@120
.84ea@360
MAG400540
0.750 x (0.200 / 0.365 beveled hole) x 0.125"
(Countersunk Ring)
4.10ea
3.49ea@6
2.66ea@12
2.52ea@120
2.14ea@360

Manelco Rare Earth Magnets - Cylinder Shaped
MAG4006 series
Part #
Description
(Length x Outside Diameter x
Inside Diamter)
1 Lot
2nd Break
3rd Break
4th Break
5th Break
MAG400610
0.250 x 0.250 x (0.125" hole)
(Poles run length wise)
.83ea
.66ea@13
.53@25
.45ea@250
38ea@750
MAG400620
0.250 x 0.250 x (0.100" hole)
(Poles run length wise)
1.23ea
.90ea@10
.78@20
.66ea@250
.56ea@750
Manelco Rare Earth - Sphere Shaped
MAG4007 series
Part #

Description
(Diameter)

1 Lot
2nd Break
3rd Break
4th Break
5th Break
MAG400710
0.250"
.97ea
.78ea@10
.62ea@20
.53ea@200
.45ea@600
MAG400720
0.500"
11.14ea
8.91ea@6
7.13ea@12
6.06ea@120
5.15ea@360

Ferite Magnets
Manelco Ferite Magnets
Part #
Description
Price 1
Price 2
Price 3
MAG100110
12 x 3.80mm Disc
$1.00/5
$3.75/25
$12.00/100
MAG100120 (NLA)
16 x 3mm Disc
$1.00/5
$3.75/25
$12.00/100
MAG100130
20 x 3mm Disc
$1.00/4
$5.00/25
$16.00/100
MAG100140
25 x 4mm Disc
$1.00/2
$3.50/10
$12.50/50
MAG100150
30 x 4mm Disc
$1.00/2
$3.50/10
$12.50/50
MAG100210
6.5 x 10mm Long Rod
$1.00/10
$4.00/50
$6.00/100
MAG100340
25.5 x 20 x 4.5mm x (5mm Hole)
$1.00/2
$3.50/10
$12.50/50

Q:How rugged are the magnets?

Rare Earth magnets are extremely brittle and are vulnerable to corrosion. If you let them slam together they can shatter, crack or chip.

Q:Will my magnets demagnetize if I heat them?

Yes, if you heat them beyond 170 degrees Fahrenheit (80 degrees Celsius) the magnets will quickly loose their magnetic properties. Sustaining these temperatures for a length of time or heating the magnet significantly higher than this will permanently demagnetize it. Other types of magnets such as Samarium-Cobalt have higher heat resistance(below 300 degree Celsius). There are also other types of Nd-Fe-B magnets that are not as susceptible to heat induced flux degradation,H grade could withstand 100 degree Celsius,SH grade 150 oC ,UH grade 180oC,and EH grade 200oC.

Q:I would like to get a single pole magnet?

They don’t exist. All magnets have two poles,N and S.

Q:Do magnets pose a health risk?

No, unless you have an internal medical device such as a pacemaker that would be affected by a strong magnetic field. However, Nd-Fe-B magnets are very strong and should be handled with care. These magnets can pinch if allowed to come together against the skin. Keep away from children, swallowing more then one can cause problems if they come together in the intesinal area.

Q:How thick could the plating thickness of NdFeb be?

Present technology could only plate Ndfeb magnet with max.30 microns thickness. as the plating will bubble and come off if it surpass 30 microns.

Q:How are your magnets measured and graded for strength, quality, etc.?

Magnet Strength Measurements (B) --The units for measuring the field strength (flux density) of a magnet are Gauss or Tesla. 1 Tesla = 10,000 Gauss.There are different ways to classify and measure field strength:

B (flux density): This is the measurement (in Gauss or Tesla) you get when you use a gaussmeter at the surface of a magnet. The reading is completely dependant on the distance from the surface, the shape of the magnet, the exact location measured, the thickness of the probe and of the magnet's plating. Steel behind a magnet will increase the measured 'B' significantly. Not a very good way to compare magnets, since B varies so much depending on measurement techniques.

Br (residual flux density): The maximum flux a magnet can produce, measured only in a closed magnetic circuit.They are a good way to compare magnet strength...

B-H Curve: Also called a "hysteresis loop," this graph shows how a magnetic material performs as it is brought to saturation, demagnetized, saturated in the opposite direction, then demagnetized again by an external field. The second quadrant of the graph is the most important in actual use--the point where the curve crosses the B axis is Br, and the point where it crosses the H axis is Hc (see below). The product of Br and Hc is BHmax.very complicated and expensive equipment is needed to plot a B-H curve.

Magnet Quality (BHmax): The quality of magnetic materials is best stated by the Maximum Energy Product (BHmax), measured in MegaGauss Oersted (MGOe). This is because the size and shape of a magnet and the material behind it (such as iron) have a large effect on the measured field strength at the surface, as does the exact location at which it measured.

Coercivity (Hc): This measures a magnet's resistance to demagnetization. It is the external magnetic field strength required to magnetize, de-magnetize or re-magnetize a material, also measured in Gauss or Tesla.

Q:Will magnets corrode if used outdoors?

NdFeB magnets are susceptible to corrosion. The 'Fe' in the name stands for Iron, and it rusts easily as it’s atom is quite active and it’s easily oxidated! Many of our magnets come with a Nickel, Zinc, Gold or Epoxy coating to protect them from moisture. If the coating is damaged , the magnet could rust if exposed to water or humidity.

Q:How are magnets manufactured? Can I make them at home?

Manufacturing: NdFeB magnets are complicated to manufacture. The raw material should be firstly made into alloy, powdered, orientated in magnetic field, shaped, finally sintered. All of the process should be done with the protection of nitrogen. After sintered process, the finished raw magnets should be inspected in terms of magnetic properties, then finally machined to the sizes required and plated with surface coating. To magnetize them, they are placed in a very expensive machine that generates an extremely high-powered magnetic field for an instant, using high-voltage capacitor discharge and coils. The polarity of the finished magnet depends on how it was oriented in the magnetizing machine, and how the particles in the sintered mixture were oriented. So that makes home manufacture impossible. You CAN, however, make a simple steel magnet at home. Take a nail and stroke it with a strong NdFeB magnet 20 or 30 times, ALWAYS moving the magnet in only one direction on the nail. Presto, the nail will be magnetized, although very weakly and it’ll demagnetize shortly.

Q:How can you ship magnets safely? Don't they affect airplane safety?

We take great care when packing orders to see that any magnetic fields are well contained within the box(wooden box or carton) we send them in. We pack very carefully so the external magnetic fields cancel out, and we use steel box liners as needed to insure that every box is safe and non-magnetic to comply with national and international postal regulations. We also test each package before it goes out to be sure it complies with all regulations

Q:How about the application of Ndfeb magnets?

Permanent Motor, Linear Motors, Mini motor(libration motor), Motors for electric bicycle, Speakers, Telecommunication, Computer drive,VCD,DVD, CD-ROM, OA equipment, Home appliance, Meters, Magnetic separator(used in Food, Mine, Glass and Coal industry),Magnetic cranes, Magnetic salvage and Magnetic chucks, Magnetic jewelry, Toys, Button, Magnetic therapy, Nuclear magnetism resonance, Magnetic health care, Stop motion animation, Diamagnetic leviation, Electrodynamic bearings, Launched roller coasters, LED throwies, Guitar pickups.

and on the lighter side

Cow magnets are popular with dairy farmers and veterinarians to help prevent Hardware Disease in their cattle. While grazing, cows eat everything from grass and dirt to nails, staples and bits of bailing wire (referred to as tramp iron). Tramp iron tends to lodge in the honeycombed walls of the recticulum, threatening the surrounding vital organs and causing irritation and inflammation, known as Hardware Disease. The cow loses her appetite and decreases her milk output (dairy cows), or her ability to gain weight (feeder stock). Cow magnets help prevent this disease by attracting stray metal from the folds and crevices of the rumen and recticulum. One magnet works for the life of the cow!

 


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Prices are subject to change without notice.