Magnet quality

Holding force

Diameter (D)

Thread (M)

Pot magnets with threaded bush

Compact magnet systems with a steel shell and with threaded bush for easy mounting.

Due to the shell of these pot magnets, the magnetic field strength increases and they are more resistant to corrosion or chemicals. Pot magnets have a single attracting surface. This precludes dispersion of the magnetic field.

Pot magnets with threaded bush are available in neodymium, ferrite and samarium cobalt.

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Neodymium The strongest magnet type

3 variants
Product variant

Neodymium (NdFeB) 6 mm

€ 1,92

PM-TB-N-SG-D6x11.5xM3
Article number GM17600
Stock 20
Height (H) 4.5 mm
Holding force 5 N
Thread (M) M3
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Product variant

Neodymium (NdFeB) 8 mm

€ 2,00

PM-TB-N-SG-D8x4.5x11.5xM3
Article number GM17601
Stock 97
Height (H) 4.5 mm
Holding force 13 N
Thread (M) M3
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Product variant

Neodymium (NdFeB) 10 mm

€ 2,22

PM-TB-N-SG-D10x4.5x11.5xM3
Article number GM17602
Stock 138
Height (H) 4.5 mm
Holding force 25 N
Thread (M) M3
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What does a neodymium pot magnet consist of?

These super-strong pot magnets are made of the alloy neodymium-iron-boron (NdFeB), which Goudsmit markets under the brand name Neoflux®. The shell - or pot - provides magnetic shielding. Goudsmit supplies neodymium pot magnets with a brass or steel shell. The holding surface has a protective coating to prevent corrosion.

Neodymium pot magnet with threaded bush | Goudsmit Magnetics

When does loss of magnetic strength occur?

Neodymium cylindrical and flat pot magnets have an operating temperature of up to 80 °C. When heated to this temperature, the magnet loses 15 to 20% of its magnetic strength. This is not permanent; the force is restored when the magnet returns to the normal ambient temperature.

External magnetic fields may also cause loss of magnetic force. An air gap or non-magnetic materials located between the magnet and workpiece reduce the tensile force.

Samarium cobalt pot magnet with threaded bush | Goudsmit Magnetics

Loss of holding force

To prevent loss of holding force due to magnetic short-circuit, neodymium magnets with a brass shell may not be pressed directly into iron. Always maintain a certain distance between the brass shell of the pot magnet and the iron. Contact Goudsmit for specific recommendations.

Neodymium pot magnet with threaded bush | Goudsmit Magnetics

Neodymium (continued) The strongest magnet type

5 variants
Product variant

Neodymium (NdFeB) 13 mm

€ 2,37

PM-TB-N-SG-D13x4.5x11.5xM3
Article number GM17603
Stock 737
Height (H) 4.5 mm
Holding force 60 N
Thread (M) M3
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Product variant

Neodymium (NdFeB) 16 mm

€ 2,85

PM-TB-N-SG-D16x4.5x11.5xM4
Article number GM17604
Stock 382
Height (H) 4.5 mm
Holding force 95 N
Thread (M) M4
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Product variant

Neodymium (NdFeB) 20 mm

€ 17,13

PM-TB-N-SG-D20x6x13xM4
Article number GM17605
Stock 64
Height (H) 6 mm
Holding force 140 N
Thread (M) M4
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Product variant

Neodymium (NdFeB) 25 mm

€ 5,99

PM-TB-N-SG-D25x7x14xM4
Article number GM17606
Stock 25
Height (H) 7 mm
Holding force 200 N
Thread (M) M4
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Product variant

Neodymium (NdFeB) 32 mm

€ 8,33

PM-TB-N-SG-D32x7x15.5xM5
Article number GM17607
Stock 12
Height (H) 7 mm
Holding force 350 N
Thread (M) M5
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Samarium cobalt High magnetic force at high operating temperature

3 variants
Product variant

Samarium-Cobalt (SmCo) 6 mm

€ 1,83

PM-TB-S-SG-D6x11.5xM3
Article number GM17201
Stock 0
Height (H) 4.5 mm
Holding force 5 N
Thread (M) M3
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Product variant

Samarium-Cobalt (SmCo) 8 mm

€ 1,83

PM-TB-S-SG-D8x4.5x11.5xM3
Article number GM17202
Stock 27
Height (H) 4.5 mm
Holding force 11 N
Thread (M) M3
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Product variant

Samarium-Cobalt (SmCo) 10 mm

€ 2,42

PM-TB-S-SG-D10x4.5x11.5xM3
Article number GM17203
Stock 17
Height (H) 4.5 mm
Holding force 20 N
Thread (M) M3
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What does a pot magnet of samarium cobalt consist of?

Samarium-cobalt pot magnets offer the unique combination of high magnetic force and high operating temperature. These super-strong pot magnets are made of an alloy of samarium and cobalt. The holding force at room temperature is 5 times higher than that of ferrite pot magnets.

With the exception of Neoflux® pot magnets, samarium cobalt pot magnets are the strongest that we have in our product range.

Samarium cobalt pot magnet with threaded bush | Goudsmit Magnetics

What temperature does magnet strength loss occur at?

Samarium cobalt pot magnets have an operating temperature of up to 200 °C. When heated to this temperature, the magnet loses 15 to 20% of its magnetic strength. This is not permanent; the force is restored when the magnet temperature returns to the normal ambient temperature. The magnet force of these pot magnets is lower than that of neodymium pot magnets.

External magnetic fields may also cause loss of magnetic force. An air gap or non-magnetic materials located between the magnet and workpiece reduce the tensile force.

Samarium cobalt pot magnet with threaded bush | Goudsmit Magnetics

Installation and demagnetization

The steel pot does not provide any magnetic shielding. Therefore, these pot magnets may not be built into steel components without taking special measures. The distance between the steel component and the samarium cobalt pot magnet must be 1.5 to 6 mm, depending on the size of the pot magnet.

Samarium cobalt pot magnets are very stable and are difficult to demagnetize in a strong alternating current field.

Samarium cobalt pot magnet with threaded bush | Goudsmit Magnetics

Samarium cobalt (continued) High magnetic force at high operating temperature

5 variants
Product variant

Samarium-Cobalt (SmCo) 13 mm

€ 2,88

PM-TB-S-SG-D13x4.5x11.5xM3
Article number GM17204
Stock 0
Height (H) 4.5 mm
Holding force 40 N
Thread (M) M3
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Product variant

Samarium-Cobalt (SmCo) 16 mm

€ 3,78

PM-TB-S-SG-D16x4.5x11.5xM3
Article number GM17205
Stock 33
Height (H) 4.5 mm
Holding force 60 N
Thread (M) M4
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Product variant

Samarium-Cobalt (SmCo) 20 mm

€ 5,56

PM-TB-S-SG-D20x6x13xM4
Article number GM17206
Stock 80
Height (H) 6 mm
Holding force 90 N
Thread (M) M4
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Product variant

Samarium-Cobalt (SmCo) 25 mm

€ 8,40

PM-TB-S-SG-D25x7x14xM4
Article number GM17207
Stock 0
Height (H) 7 mm
Holding force 150 N
Thread (M) M4
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Product variant

Samarium-Cobalt (SmCo) 32 mm

€ 12,31

PM-TB-S-SG-D32x7x15.5xM5
Article number GM17208
Stock 0
Height (H) 7 mm
Holding force 220 N
Thread (M) M5
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Ferrite Cost effective

3 variants
Product variant

Ferrite 10 mm

€ 1,82

PM-TB-F-SG-D10x4.5x11.5xM3
Article number GM16501
Stock 0
Height (H) 4.5 mm
Holding force 4 N
Thread (M) M3
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Product variant

Ferrite 13 mm

€ 1,98

PM-TB-F-SG-D13x4.5x11,5xM3
Article number GM16502
Stock 0
Height (H) 4.5 mm
Holding force 10 N
Thread (M) M3
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Product variant

Ferrite 16 mm

€ 2,15

PM-TB-F-SG-D16x4.5x11.5xM3
Article number GM16503
Stock 50
Height (H) 4.5 mm
Holding force 18 N
Thread (M) M3
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Good magnetic properties, affordably priced

Ferrite pot magnets, also referred to as ceramic pot magnets, are fitted with a steel pot that provides shielding of the magnetic field. Ferrite pot magnets require only a minimal installation height. This provides constructive advantages.

Ferrite pot magnet with threaded bush | Goudsmit Magnetics

When does loss of magnetic strength occur?

Ferrite pot magnets have an operating temperature of up to 200 °C. When heated to this temperature, the magnet loses 30 to 40% of its magnetic force. This is not permanent; the force is restored when the magnet temperature returns to the normal ambient temperature. The magnet force of these pot magnets is lower than that of neodymium pot magnets.

External magnetic fields may also cause loss of magnetic force. An air gap or non-magnetic materials located between the magnet and workpiece reduce the tensile force.

Neodymium pot magnet with threaded bush | Goudsmit Magnetics

Corrosion-resistant

Ferrite pot magnets do not corrode and are suitable for outdoor use.

Ferrite pot magnet with threaded bush | Goudsmit Magnetics

Ferrite (continued) Cost effective

9 variants
Product variant

Ferrite 20 mm

€ 2,28

PM-TB-F-SG-D20x6x13xM3
Article number GM16504
Stock 254
Height (H) 6 mm
Holding force 30 N
Thread (M) M3
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Product variant

Ferrite 25 mm

€ 2,47

PM-TB-F-SG-D25x7x15xM4
Article number GM16505
Stock 100
Height (H) 7 mm
Holding force 40 N
Thread (M) M4
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Product variant

Ferrite 32 mm

€ 2,72

PM-TB-F-SG-D32x7x15xM4
Article number GM16506
Stock 122
Height (H) 7 mm
Holding force 80 N
Thread (M) M4
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Product variant

Ferrite 40 mm

€ 3,50

PM-TB-F-SG-D40x8x18xM5
Article number GM16507
Stock 35
Height (H) 8 mm
Holding force 125 N
Thread (M) M5
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Product variant

Ferrite 50 mm

€ 4,52

PM-TB-F-SG-D50x10x22xM6
Article number GM16508
Stock 22
Height (H) 10 mm
Holding force 220 N
Thread (M) M6
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Product variant

Ferrite 63 mm

€ 7,94

PM-TB-F-SG-D63x14x30xM8
Article number GM16509
Stock 0
Height (H) 14 mm
Holding force 350 N
Thread (M) M8
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Product variant

Ferrite 80 mm

€ 13,49

PM-TB-F-SG-D80x18x34xM10
Article number GM16510
Stock 29
Height (H) 18 mm
Holding force 600 N
Thread (M) M10
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Product variant

Ferrite 100 mm

€ 34,01

PM-TB-F-SG-D100x22x43xM12
Article number GM16511
Stock 23
Height (H) 22 mm
Holding force 900 N
Thread (M) M12
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Product variant

Ferrite 125 mm

€ 100,51

PM-TB-F-SG-D125x25x50xM14
Article number GM16512
Stock 0
Height (H) 26 mm
Holding force 1300 N
Thread (M) M14
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