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Magnet fishing: solid F200/F400 sets

Begin your hobby related to seabed exploration! Our double-handle grips (F200, F400) provide safety guarantee and immense power. Stainless steel construction and reinforced ropes are reliable in any water.

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Proven solutions for mounting non-invasive. Threaded mounts (M8, M10, M12) provide quick improvement of work on production halls. They are indispensable installing lamps, sensors and ads.

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MW 9.5x1 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010107

GTIN/EAN: 5906301811060

5.00

Diameter Ø

9.5 mm [±0,1 mm]

Height

1 mm [±0,1 mm]

Weight

0.53 g

Magnetization Direction

↑ axial

Load capacity

0.40 kg / 3.96 N

Magnetic Induction

127.68 mT / 1277 Gs

Coating

[NiCuNi] Nickel

0.295 with VAT / pcs + price for transport

0.240 ZŁ net + 23% VAT / pcs

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Technical specification of the product - MW 9.5x1 / N38 - cylindrical magnet

Specification / characteristics - MW 9.5x1 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010107
GTIN/EAN 5906301811060
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin Poland / China / Germany
Customs code 85059029
Diameter Ø 9.5 mm [±0,1 mm]
Height 1 mm [±0,1 mm]
Weight 0.53 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.40 kg / 3.96 N
Magnetic Induction ~ ? 127.68 mT / 1277 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 9.5x1 / N38 - cylindrical magnet
properties values units
remenance Br [min. - max.] ? 12.2-12.6 kGs
remenance Br [min. - max.] ? 1220-1260 mT
coercivity bHc ? 10.8-11.5 kOe
coercivity bHc ? 860-915 kA/m
actual internal force iHc ≥ 12 kOe
actual internal force iHc ≥ 955 kA/m
energy density [min. - max.] ? 36-38 BH max MGOe
energy density [min. - max.] ? 287-303 BH max KJ/m
max. temperature ? ≤ 80 °C

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
properties values units
Vickers hardness ≥550 Hv
Density ≥7.4 g/cm3
Curie Temperature TC 312 - 380 °C
Curie Temperature TF 593 - 716 °F
Specific resistance 150 μΩ⋅cm
Bending strength 250 MPa
Compressive strength 1000~1100 MPa
Thermal expansion parallel (∥) to orientation (M) (3-4) x 10-6 °C-1
Thermal expansion perpendicular (⊥) to orientation (M) -(1-3) x 10-6 °C-1
Young's modulus 1.7 x 104 kg/mm²

Engineering simulation of the product - data

Presented values constitute the result of a engineering simulation. Results rely on algorithms for the material Nd2Fe14B. Real-world performance may differ. Please consider these data as a supplementary guide for designers.

Table 1: Static force (pull vs gap) - characteristics
MW 9.5x1 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 1276 Gs
127.6 mT
0.40 kg / 0.88 lbs
400.0 g / 3.9 N
weak grip
1 mm 1129 Gs
112.9 mT
0.31 kg / 0.69 lbs
312.8 g / 3.1 N
weak grip
2 mm 905 Gs
90.5 mT
0.20 kg / 0.44 lbs
201.0 g / 2.0 N
weak grip
3 mm 683 Gs
68.3 mT
0.11 kg / 0.25 lbs
114.5 g / 1.1 N
weak grip
5 mm 366 Gs
36.6 mT
0.03 kg / 0.07 lbs
32.9 g / 0.3 N
weak grip
10 mm 92 Gs
9.2 mT
0.00 kg / 0.00 lbs
2.1 g / 0.0 N
weak grip
15 mm 33 Gs
3.3 mT
0.00 kg / 0.00 lbs
0.3 g / 0.0 N
weak grip
20 mm 15 Gs
1.5 mT
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
weak grip
30 mm 5 Gs
0.5 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
weak grip
50 mm 1 Gs
0.1 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
weak grip

Table 2: Vertical capacity (vertical surface)
MW 9.5x1 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.08 kg / 0.18 lbs
80.0 g / 0.8 N
1 mm Stal (~0.2) 0.06 kg / 0.14 lbs
62.0 g / 0.6 N
2 mm Stal (~0.2) 0.04 kg / 0.09 lbs
40.0 g / 0.4 N
3 mm Stal (~0.2) 0.02 kg / 0.05 lbs
22.0 g / 0.2 N
5 mm Stal (~0.2) 0.01 kg / 0.01 lbs
6.0 g / 0.1 N
10 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
15 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N

Table 3: Vertical assembly (sliding) - vertical pull
MW 9.5x1 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.12 kg / 0.26 lbs
120.0 g / 1.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.08 kg / 0.18 lbs
80.0 g / 0.8 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.04 kg / 0.09 lbs
40.0 g / 0.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.20 kg / 0.44 lbs
200.0 g / 2.0 N

Table 4: Material efficiency (substrate influence) - sheet metal selection
MW 9.5x1 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.04 kg / 0.09 lbs
40.0 g / 0.4 N
1 mm
25%
0.10 kg / 0.22 lbs
100.0 g / 1.0 N
2 mm
50%
0.20 kg / 0.44 lbs
200.0 g / 2.0 N
3 mm
75%
0.30 kg / 0.66 lbs
300.0 g / 2.9 N
5 mm
100%
0.40 kg / 0.88 lbs
400.0 g / 3.9 N
10 mm
100%
0.40 kg / 0.88 lbs
400.0 g / 3.9 N
11 mm
100%
0.40 kg / 0.88 lbs
400.0 g / 3.9 N
12 mm
100%
0.40 kg / 0.88 lbs
400.0 g / 3.9 N

Table 5: Thermal stability (material behavior) - thermal limit
MW 9.5x1 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.40 kg / 0.88 lbs
400.0 g / 3.9 N
OK
40 °C -2.2% 0.39 kg / 0.86 lbs
391.2 g / 3.8 N
OK
60 °C -4.4% 0.38 kg / 0.84 lbs
382.4 g / 3.8 N
80 °C -6.6% 0.37 kg / 0.82 lbs
373.6 g / 3.7 N
100 °C -28.8% 0.28 kg / 0.63 lbs
284.8 g / 2.8 N

Table 6: Two magnets (repulsion) - forces in the system
MW 9.5x1 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 0.71 kg / 1.57 lbs
2 403 Gs
0.11 kg / 0.24 lbs
107 g / 1.0 N
N/A
1 mm 0.65 kg / 1.43 lbs
2 436 Gs
0.10 kg / 0.21 lbs
97 g / 1.0 N
0.58 kg / 1.29 lbs
~0 Gs
2 mm 0.56 kg / 1.23 lbs
2 257 Gs
0.08 kg / 0.18 lbs
84 g / 0.8 N
0.50 kg / 1.10 lbs
~0 Gs
3 mm 0.46 kg / 1.00 lbs
2 041 Gs
0.07 kg / 0.15 lbs
68 g / 0.7 N
0.41 kg / 0.90 lbs
~0 Gs
5 mm 0.27 kg / 0.60 lbs
1 580 Gs
0.04 kg / 0.09 lbs
41 g / 0.4 N
0.25 kg / 0.54 lbs
~0 Gs
10 mm 0.06 kg / 0.13 lbs
732 Gs
0.01 kg / 0.02 lbs
9 g / 0.1 N
0.05 kg / 0.12 lbs
~0 Gs
20 mm 0.00 kg / 0.01 lbs
183 Gs
0.00 kg / 0.00 lbs
1 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
50 mm 0.00 kg / 0.00 lbs
16 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
60 mm 0.00 kg / 0.00 lbs
10 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
70 mm 0.00 kg / 0.00 lbs
6 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
80 mm 0.00 kg / 0.00 lbs
4 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
90 mm 0.00 kg / 0.00 lbs
3 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
100 mm 0.00 kg / 0.00 lbs
2 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs

Table 7: Hazards (implants) - precautionary measures
MW 9.5x1 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 3.0 cm
Hearing aid 10 Gs (1.0 mT) 2.5 cm
Mechanical watch 20 Gs (2.0 mT) 2.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 1.5 cm
Car key 50 Gs (5.0 mT) 1.5 cm
Payment card 400 Gs (40.0 mT) 0.5 cm
HDD hard drive 600 Gs (60.0 mT) 0.5 cm

Table 8: Dynamics (kinetic energy) - warning
MW 9.5x1 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 27.80 km/h
(7.72 m/s)
0.02 J
30 mm 47.99 km/h
(13.33 m/s)
0.05 J
50 mm 61.95 km/h
(17.21 m/s)
0.08 J
100 mm 87.61 km/h
(24.34 m/s)
0.16 J

Table 9: Corrosion resistance
MW 9.5x1 / N38

Technical parameter Value / Description
Coating type [NiCuNi] Nickel
Layer structure Nickel - Copper - Nickel
Layer thickness 10-20 µm
Salt spray test (SST) ? 24 h
Recommended environment Indoors only (dry)

Table 10: Construction data (Pc)
MW 9.5x1 / N38

Parameter Value SI Unit / Description
Magnetic Flux 1 184 Mx 11.8 µWb
Pc Coefficient 0.16 Low (Flat)

Table 11: Physics of underwater searching
MW 9.5x1 / N38

Environment Effective steel pull Effect
Air (land) 0.40 kg Standard
Water (riverbed) 0.46 kg
(+0.06 kg buoyancy gain)
+14.5%
Warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
1. Wall mount (shear)

*Note: On a vertical wall, the magnet holds only approx. 20-30% of its nominal pull.

2. Plate thickness effect

*Thin steel (e.g. 0.5mm PC case) significantly limits the holding force.

3. Temperature resistance

*For standard magnets, the max working temp is 80°C.

4. Demagnetization curve and operating point (B-H)

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.16

The chart above illustrates the magnetic characteristics of the material within the second quadrant of the hysteresis loop. The solid red line represents the demagnetization curve (material potential), while the dashed blue line is the load line based on the magnet's geometry. The Pc (Permeance Coefficient), also known as the load line slope, is a dimensionless value that describes the relationship between the magnet's shape and its magnetic stability. The intersection of these two lines (the black dot) is the operating point — it determines the actual magnetic flux density generated by the magnet in this specific configuration. A higher Pc value means the magnet is more 'slender' (tall relative to its area), resulting in a higher operating point and better resistance to irreversible demagnetization caused by external fields or temperature. A value of 0.42 is relatively low (typical for flat magnets), meaning the operating point is closer to the 'knee' of the curve — caution is advised when operating at temperatures near the maximum limit to avoid strength loss.

Engineering data and GPSR
Elemental analysis
iron (Fe) 64% – 68%
neodymium (Nd) 29% – 32%
boron (B) 1.1% – 1.2%
dysprosium (Dy) 0.5% – 2.0%
coating (Ni-Cu-Ni) < 0.05%
Sustainability
recyclability (EoL) 100%
recycled raw materials ~10% (pre-cons)
carbon footprint low / zredukowany
waste code (EWC) 16 02 16
Safety card (GPSR)
responsible entity
Dhit sp. z o.o.
ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki
tel: +48 22 499 98 98 | e-mail: bok@dhit.pl
batch number/type
id: 010107-2026
Measurement Calculator
Pulling force

Field Strength

Other proposals

The offered product is an incredibly powerful cylinder magnet, manufactured from durable NdFeB material, which, with dimensions of Ø9.5x1 mm, guarantees maximum efficiency. This specific item features high dimensional repeatability and professional build quality, making it a perfect solution for professional engineers and designers. As a cylindrical magnet with significant force (approx. 0.40 kg), this product is available off-the-shelf from our European logistics center, ensuring rapid order fulfillment. Moreover, its triple-layer Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
This model is created for building electric motors, advanced sensors, and efficient filters, where field concentration on a small surface counts. Thanks to the high power of 3.96 N with a weight of only 0.53 g, this rod is indispensable in electronics and wherever low weight is crucial.
Since our magnets have a very precise dimensions, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 9.5.1 mm) using two-component epoxy glues. To ensure stability in industry, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.
Magnets N38 are suitable for the majority of applications in modeling and machine building, where extreme miniaturization with maximum force is not required. If you need the strongest magnets in the same volume (Ø9.5x1), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our warehouse.
This model is characterized by dimensions Ø9.5x1 mm, which, at a weight of 0.53 g, makes it an element with impressive magnetic energy density. The key parameter here is the lifting capacity amounting to approximately 0.40 kg (force ~3.96 N), which, with such defined dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which secures it against oxidation, giving it an aesthetic, silvery shine.
Standardly, the magnetic axis runs through the center of the cylinder, causing the greatest attraction force to occur on the bases with a diameter of 9.5 mm. Thanks to this, the magnet can be easily glued into a hole and achieve a strong field on the front surface. On request, we can also produce versions magnetized through the diameter if your project requires it.

Advantages and disadvantages of rare earth magnets.

Benefits

In addition to their pulling strength, neodymium magnets provide the following advantages:
  • They retain full power for almost ten years – the drop is just ~1% (in theory),
  • Neodymium magnets are exceptionally resistant to loss of magnetic properties caused by external field sources,
  • A magnet with a metallic silver surface looks better,
  • Neodymium magnets achieve maximum magnetic induction on a contact point, which allows for strong attraction,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
  • Thanks to freedom in forming and the ability to adapt to complex applications,
  • Huge importance in innovative solutions – they are used in mass storage devices, electric motors, medical equipment, and industrial machines.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Disadvantages

Problematic aspects of neodymium magnets and proposals for their use:
  • Susceptibility to cracking is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a steel housing, which not only protects them against impacts but also raises their durability
  • We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
  • Magnets exposed to a humid environment can rust. Therefore while using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • Limited possibility of making threads in the magnet and complex shapes - preferred is a housing - magnet mounting.
  • Possible danger resulting from small fragments of magnets are risky, when accidentally swallowed, which becomes key in the context of child health protection. Additionally, small components of these magnets are able to complicate diagnosis medical when they are in the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Pull force analysis

Best holding force of the magnet in ideal parameterswhat it depends on?

The force parameter is a measurement result performed under standard conditions:
  • with the application of a yoke made of low-carbon steel, guaranteeing maximum field concentration
  • whose transverse dimension is min. 10 mm
  • with a plane free of scratches
  • without the slightest clearance between the magnet and steel
  • during pulling in a direction perpendicular to the mounting surface
  • at standard ambient temperature

Practical aspects of lifting capacity – factors

In real-world applications, the actual lifting capacity depends on many variables, ranked from most significant:
  • Distance – the presence of any layer (rust, dirt, gap) interrupts the magnetic circuit, which reduces capacity rapidly (even by 50% at 0.5 mm).
  • Force direction – declared lifting capacity refers to detachment vertically. When applying parallel force, the magnet exhibits much less (typically approx. 20-30% of maximum force).
  • Plate thickness – too thin sheet causes magnetic saturation, causing part of the power to be wasted to the other side.
  • Material composition – not every steel attracts identically. Alloy additives weaken the interaction with the magnet.
  • Plate texture – smooth surfaces guarantee perfect abutment, which increases force. Uneven metal reduce efficiency.
  • Temperature influence – hot environment reduces pulling force. Too high temperature can permanently demagnetize the magnet.

Holding force was tested on the plate surface of 20 mm thickness, when a perpendicular force was applied, however under parallel forces the load capacity is reduced by as much as 75%. Moreover, even a minimal clearance between the magnet’s surface and the plate decreases the load capacity.

Warnings
GPS and phone interference

GPS units and mobile phones are extremely susceptible to magnetism. Direct contact with a strong magnet can decalibrate the internal compass in your phone.

Maximum temperature

Avoid heat. Neodymium magnets are sensitive to temperature. If you require resistance above 80°C, ask us about HT versions (H, SH, UH).

Choking Hazard

These products are not intended for children. Accidental ingestion of several magnets can lead to them pinching intestinal walls, which constitutes a direct threat to life and requires immediate surgery.

Nickel allergy

It is widely known that nickel (standard magnet coating) is a strong allergen. If your skin reacts to metals, refrain from direct skin contact and select encased magnets.

Do not underestimate power

Use magnets with awareness. Their huge power can shock even experienced users. Be vigilant and do not underestimate their power.

Electronic devices

Intense magnetic fields can erase data on payment cards, hard drives, and other magnetic media. Maintain a gap of min. 10 cm.

Health Danger

Life threat: Strong magnets can turn off heart devices and defibrillators. Stay away if you have electronic implants.

Shattering risk

Despite metallic appearance, the material is delicate and cannot withstand shocks. Avoid impacts, as the magnet may shatter into hazardous fragments.

Fire risk

Powder produced during grinding of magnets is flammable. Do not drill into magnets unless you are an expert.

Pinching danger

Pinching hazard: The pulling power is so immense that it can result in hematomas, pinching, and broken bones. Protective gloves are recommended.

Caution! Need more info? Read our article: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98