← previous
next →
Product available Ships today (order by 14:00) CO2 GPSR PPWR REACH

MW 15x3 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010029

GTIN/EAN: 5906301810285

5.00
Load capacity 2.87 kg / 28.14 N Magnetic Induction 230.16 mT / 2302 Gs
Diameter Ø
15 mm [±0,1 mm]
Height
3 mm [±0,1 mm]
Weight
3.98 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

product details »

1.320 zł net / pcs

1.624 zł with VAT (23% VAT) / pcs

price for transport

bulk discounts:

Need more?
Quantity
Net
Gross
price from 1 pcs
1.320 zł
1.624 zł
price from 500 pcs
1.241 zł
1.526 zł
price from 1900 pcs
1.162 zł
1.429 zł

Frequently asked questions

What is the maximum working temperature of a disc magnet?
Standard N-series grades work up to 80 °C. Grades N50, N52 and N54 have a lower limit of 60 °C, because coercivity falls as BHmax rises. Higher temperatures require the H (120 °C), SH (150 °C), UH (180 °C), EH (200 °C) or AH (230 °C) series. Within the working range the magnet loses about 0.11% of its induction per degree, and that loss is reversible.
What is the difference between N38, N42 and N52?
The number after N is the energy product BHmax. Moving from N38 to N52 raises it by several tens of percent, but the real holding force increases by roughly 20%, because force also depends on geometry and on the magnetic circuit. N52 costs about twice as much as N42, so for most mounting work N38–N42 is the best price-to-force ratio.
What is the dimensional tolerance?
±0.1 mm as standard, ±0.05 mm to order. The tolerance is stated next to the dimensions on every product page.

Guides from the knowledge base

Engineering report for this magnet

Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.

PDF report Calculator
Want to talk magnets?

Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power calculator.

Order by 14:00 and we’ll ship today!

Technical details - MW 15x3 / N38 - cylindrical magnet

Specification / characteristics - MW 15x3 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010029
GTIN/EAN 5906301810285
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 15 mm [±0,1 mm]
Height 3 mm [±0,1 mm]
Weight 3.98 g
Magnetization Direction ↑ axial
Load capacity ~ ? 2.87 kg / 28.14 N
Magnetic Induction ~ ? 230.16 mT / 2302 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 15x3 / N38 - cylindrical magnet
properties values units
Remanence Br ? 12.2-12.6 kGs
Remanence Br ? 1220-1260 mT
Coercivity bHc ? 10.8-11.5 kOe
Coercivity bHc ? 860-915 kA/m
Intrinsic coercivity iHc ≥ 12 kOe
Intrinsic coercivity iHc ≥ 955 kA/m
Energy product BHmax ? 36-38 BH max MGOe
Energy product BHmax ? 287-303 BH max KJ/m
Maximum working 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 310 °C
Curie Temperature TF 590 °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 information are the result of a engineering calculation. Values are based on algorithms for the class Nd2Fe14B. Actual conditions might slightly differ from theoretical values. Treat these calculations as a reference point when designing systems.

Table 1: Static force (pull vs gap) - interaction chart
MW 15x3 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2301 Gs
230.1 mT
 2.87 kg / 6.33 LBS
2870.0 g / 28.2 N
 medium risk
1 mm 2098 Gs
209.8 mT
 2.39 kg / 5.26 LBS
2386.5 g / 23.4 N
 medium risk
2 mm 1842 Gs
184.2 mT
 1.84 kg / 4.05 LBS
1838.5 g / 18.0 N
 safe
3 mm 1570 Gs
157.0 mT
 1.34 kg / 2.95 LBS
1337.0 g / 13.1 N
 safe
5 mm 1084 Gs
108.4 mT
 0.64 kg / 1.40 LBS
637.0 g / 6.2 N
 safe
10 mm 410 Gs
41.0 mT
 0.09 kg / 0.20 LBS
91.3 g / 0.9 N
 safe
15 mm 178 Gs
17.8 mT
 0.02 kg / 0.04 LBS
17.1 g / 0.2 N
 safe
20 mm 89 Gs
8.9 mT
 0.00 kg / 0.01 LBS
4.3 g / 0.0 N
 safe
30 mm 31 Gs
3.1 mT
 0.00 kg / 0.00 LBS
0.5 g / 0.0 N
 safe
50 mm 7 Gs
0.7 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 safe
Grip strength drops significantly with every subsequent millimeter of distance. Keep in mind that even a very thin break (e.g., dirt, paint, dust) significantly weakens the grip. Magnets operate most effectively during direct contact; distance nullifies the power. Analyze how flashily the pull force plummet, when the magnet does not adhere flatly to the metal substrate. When planning the assembly, eliminate unnecessary gaps.

Table 2: Vertical load (wall)
MW 15x3 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.57 kg / 1.27 LBS
574.0 g / 5.6 N
1 mm Stal (~0.2) 0.48 kg / 1.05 LBS
478.0 g / 4.7 N
2 mm Stal (~0.2) 0.37 kg / 0.81 LBS
368.0 g / 3.6 N
3 mm Stal (~0.2) 0.27 kg / 0.59 LBS
268.0 g / 2.6 N
5 mm Stal (~0.2) 0.13 kg / 0.28 LBS
128.0 g / 1.3 N
10 mm Stal (~0.2) 0.02 kg / 0.04 LBS
18.0 g / 0.2 N
15 mm Stal (~0.2) 0.00 kg / 0.01 LBS
4.0 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
This section indicates the theoretical weight limit required to initiate the sliding of the magnet downwards against a upright steel wall (assuming standard friction). This value is relative to the air gap between the magnet and the metal.

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MW 15x3 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.86 kg / 1.90 LBS
861.0 g / 8.4 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.57 kg / 1.27 LBS
574.0 g / 5.6 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.29 kg / 0.63 LBS
287.0 g / 2.8 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.44 kg / 3.16 LBS
1435.0 g / 14.1 N
When placing a holder on a upright wall (e.g., a board), it you can count on just approx. 1/5 of its nominal power. Gravity as well as a weak degree of grip cause that holders move down easier than they pop off the substrate. Want to create a vertical fastening? Remember that the sliding force is much weaker than the maximum static pull force. On a smooth steel, the magnet will give way down under a significantly smaller load. Utilizing a rubberized coating can effectively increase the grip.

Table 4: Material efficiency (substrate influence) - power losses
MW 15x3 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.29 kg / 0.63 LBS
287.0 g / 2.8 N
1 mm
25%
 0.72 kg / 1.58 LBS
717.5 g / 7.0 N
2 mm
50%
 1.44 kg / 3.16 LBS
1435.0 g / 14.1 N
3 mm
75%
 2.15 kg / 4.75 LBS
2152.5 g / 21.1 N
5 mm
100%
 2.87 kg / 6.33 LBS
2870.0 g / 28.2 N
10 mm
100%
 2.87 kg / 6.33 LBS
2870.0 g / 28.2 N
11 mm
100%
 2.87 kg / 6.33 LBS
2870.0 g / 28.2 N
12 mm
100%
 2.87 kg / 6.33 LBS
2870.0 g / 28.2 N
A thin sheet is incapable of absorb the full magnetic flux, which weakens actual performance of the holder. Should you mount a strong magnet to a weak sheet, the flux will pass right through and the pull force will drop sharply. To squeeze full efficiency of this neodymium's power, you require a sufficiently solid element of steel. The material oversaturation means that on sheet metal structures (e.g., thin profiles), the holder shows lower pull force. We suggest choosing the steel dimension according to the table below.

Table 5: Thermal stability (stability) - power drop
MW 15x3 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 2.87 kg / 6.33 LBS
2870.0 g / 28.2 N
 OK
40 °C -2.2% 2.81 kg / 6.19 LBS
2806.9 g / 27.5 N
 OK
60 °C -4.4% 2.74 kg / 6.05 LBS
2743.7 g / 26.9 N
80 °C -6.6% 2.68 kg / 5.91 LBS
2680.6 g / 26.3 N
100 °C -28.8% 2.04 kg / 4.51 LBS
2043.4 g / 20.0 N
Standard neodymium magnets irreversibly lose power past the thermal threshold. Watch out for overheating – excessive heat can permanently damage this magnet. With increasing heat, the neodymium's power momentarily lowers. Do not use this magnet close to ovens higher than its safe range. Exceeding the critical threshold will lead to destruction of magnetic properties.
*Important note: Temperature resistance is determined by both grade, but also on the magnet's shape. Low-profile magnets (pancake types) risk losing magnetic properties sooner than taller cylinders. Warning indicator in the table signals a risk of irreversible loss for this specific geometry.

Table 6: Magnet-Magnet interaction (attraction) - field range
MW 15x3 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 5.77 kg / 12.72 LBS
3 869 Gs
0.87 kg / 1.91 LBS
865 g / 8.5 N
 N/A
1 mm 5.32 kg / 11.73 LBS
4 419 Gs
0.80 kg / 1.76 LBS
798 g / 7.8 N
 4.79 kg / 10.55 LBS
~0 Gs
2 mm 4.80 kg / 10.57 LBS
4 196 Gs
0.72 kg / 1.59 LBS
719 g / 7.1 N
 4.32 kg / 9.52 LBS
~0 Gs
3 mm 4.25 kg / 9.36 LBS
3 948 Gs
0.64 kg / 1.40 LBS
637 g / 6.2 N
 3.82 kg / 8.42 LBS
~0 Gs
5 mm 3.17 kg / 6.99 LBS
3 412 Gs
0.48 kg / 1.05 LBS
476 g / 4.7 N
 2.85 kg / 6.29 LBS
~0 Gs
10 mm 1.28 kg / 2.82 LBS
2 168 Gs
0.19 kg / 0.42 LBS
192 g / 1.9 N
 1.15 kg / 2.54 LBS
~0 Gs
20 mm 0.18 kg / 0.40 LBS
821 Gs
0.03 kg / 0.06 LBS
28 g / 0.3 N
 0.17 kg / 0.36 LBS
~0 Gs
50 mm 0.00 kg / 0.01 LBS
101 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
62 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
41 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
28 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
20 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
15 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
Two strong neodymiums attract each other from a wider radius than a magnet and sheet combination. The setup of magnet-to-magnet generates a stronger field and a wider radius of action. Planning to create a solid fastener? Use a pair of magnets instead of one magnet and a steel. Remember that when bringing together two magnets, the pinch force is huge. The levitation is marginally weaker than the attraction, but still large.
*Field value for N-N configuration is approximately ~0 Gs at the geometric center of the gap (due to field cancellation).
Important: Estimates refer to shear force of dual same neodymium magnets (friction ~0.15 for Ni-Ni plating).

Table 7: Safety (HSE) (implants) - precautionary measures
MW 15x3 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 6.0 cm
Hearing aid 10 Gs (1.0 mT) 5.0 cm
Mechanical watch 20 Gs (2.0 mT) 4.0 cm
Mobile device 40 Gs (4.0 mT) 3.0 cm
Remote 50 Gs (5.0 mT) 3.0 cm
Payment card 400 Gs (40.0 mT) 1.5 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm
Powerful magnet radiation is a large risk to electronics as well as pacemakers. These NdFeB products produce a field that prevents correct functioning of digital equipment. Be aware: the invisible magnetic field acts through matter and plastic. Increased vigilance must be taken by people with hearing aids and insulin pumps. Influence will be felt by: mechanical watches, remotes, membranes, and displays. Avoid contact with magnetic cards, hard drives, or precise measuring instruments.

Table 8: Impact energy (cracking risk) - warning
MW 15x3 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 24.80 km/h
(6.89 m/s)
 0.09 J
30 mm 25.16 km/h
(6.99 m/s)
 0.10 J
50 mm 25.16 km/h
(6.99 m/s)
 0.10 J
100 mm 25.16 km/h
(6.99 m/s)
 0.10 J
Neodymium magnets are prone to chipping – a strong collision with metal causes immediate chipping. Pay attention to connection velocity – a neodymium left loose speeds with massive force. Striking energy can trigger coating fragments or injury to fingers. Be sure to control the product during bringing near metal so it doesn't hit with great force against the metal. A contact at a velocity of dozens of km/h means shattering of the neodymium. Wear eye protection when working with large magnets.

Table 9: Surface protection spec
MW 15x3 / 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)
The SST (salt spray test) is an industry standard for determining coating lifespan in harsh conditions. Note the thickness of the protective layer.

Table 10: Electrical data (Flux)
MW 15x3 / N38

Parameter Value SI Unit / Description
Magnetic Flux 4 718 Mx 47.2 µWb
Pc Coefficient 0.29 Low (Flat)
Total magnetic flux emitted by the magnet pole. Key data when building generators as well as sensors. The Pc coefficient determines the magnet's operating point.

Table 11: Submerged application
MW 15x3 / N38

Environment Effective steel pull Effect
Air (land) 2.87 kg Standard
Water (riverbed) 3.29 kg
(+0.42 kg buoyancy gain)
+14.5%
Warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
Contrary to myths, water does not block the magnetic field. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Sliding resistance

*Caution: On a vertical surface, the magnet holds merely a fraction of its perpendicular strength.

2. Efficiency vs thickness

*Thin metal sheet (e.g. computer case) drastically reduces 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) = 0.29

This simulation demonstrates the magnetic stability of the selected magnet under specific geometric conditions. 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.

Technical and environmental data

Chemical composition

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%

Environmental data

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: 010029-2026
Quick Unit Converter

Pulling force

Magnetic Field

Simply complete a single box, to let the tool calculate the rest instantly.

Check out also offers

SM 32x475 [2xM8] / N52 - magnetic separator
Product available Ships today (order by 14:00)

SM 32x475 [2xM8] / N52 - magnetic separator

1488.30 zł brutto / pcs
JM 18x60 - jajka bez pudełka/cena za parę - magnetic eggs
Product available Ships today (order by 14:00)

JM 18x60 - jajka bez pudełka/cena za parę - magnetic eggs

8.99 zł brutto / pcs
MPL 5x5x1.2 / N38 - lamellar magnet
Product available Ships today (order by 14:00)

MPL 5x5x1.2 / N38 - lamellar magnet

0.1845 zł brutto / pcs
AM szekla [M10] - magnetic accessories
Product available Ships today (order by 14:00)

AM szekla [M10] - magnetic accessories

4.92 zł brutto / pcs
The offered product is an incredibly powerful cylinder magnet, composed of advanced NdFeB material, which, with dimensions of Ø15x3 mm, guarantees maximum efficiency. The MW 15x3 / N38 model is characterized by a tolerance of ±0.1mm and professional build quality, making it an ideal solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 2.87 kg), this product is available off-the-shelf from our European logistics center, ensuring rapid order fulfillment. Additionally, its Ni-Cu-Ni coating shields it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
This model is ideal for building electric motors, advanced sensors, and efficient magnetic separators, where field concentration on a small surface counts. Thanks to the high power of 28.14 N with a weight of only 3.98 g, this rod is indispensable in miniature devices and wherever every gram matters.
Since our magnets have a very precise dimensions, the best method is to glue them into holes with a slightly larger diameter (e.g., 15.1 mm) using two-component epoxy glues. To ensure stability in automation, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.
Grade N38 is the most popular standard for professional neodymium magnets, offering an optimal price-to-power ratio and high resistance to demagnetization. If you need even stronger magnets in the same volume (Ø15x3), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our store.
The presented product is a neodymium magnet with precisely defined parameters: diameter 15 mm and height 3 mm. The value of 28.14 N means that the magnet is capable of holding a weight many times exceeding its own mass of 3.98 g. The product has a [NiCuNi] coating, which protects the surface against external factors, giving it an aesthetic, silvery shine.
This cylinder is magnetized axially (along the height of 3 mm), which means that the N and S poles are located on the flat, circular surfaces. Such an arrangement is most desirable when connecting magnets in stacks (e.g., in filters) or when mounting in sockets at the bottom of a hole. On request, we can also produce versions magnetized diametrically if your project requires it.

Pros and cons of rare earth magnets.

Advantages

In addition to their magnetic capacity, neodymium magnets provide the following advantages:
  • They do not lose magnetism, even over approximately 10 years – the reduction in lifting capacity is only ~1% (according to tests),
  • They show high resistance to demagnetization induced by external disturbances,
  • By applying a lustrous coating of silver, the element has an modern look,
  • Neodymium magnets create maximum magnetic induction on a contact point, which ensures high operational effectiveness,
  • Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
  • In view of the potential of accurate forming and customization to unique needs, magnetic components can be manufactured in a variety of forms and dimensions, which amplifies use scope,
  • Versatile presence in future technologies – they serve a role in magnetic memories, drive modules, advanced medical instruments, as well as industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which allows their use in small systems

Limitations

Problematic aspects of neodymium magnets: application proposals
  • They are prone to damage upon too strong impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only shields the magnet but also improves its resistance to damage
  • We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
  • When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation and corrosion.
  • Due to limitations in creating nuts and complex forms in magnets, we propose using casing - magnetic mechanism.
  • Potential hazard to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. Additionally, small components of these products are able to be problematic in diagnostics medical in case of swallowing.
  • Due to expensive raw materials, their price exceeds standard values,

Holding force characteristics

Maximum lifting force for a neodymium magnet – what it depends on?

Holding force of 2.87 kg is a theoretical maximum value performed under the following configuration:
  • on a plate made of mild steel, effectively closing the magnetic flux
  • with a thickness minimum 10 mm
  • with a surface cleaned and smooth
  • with total lack of distance (no paint)
  • under perpendicular force direction (90-degree angle)
  • at conditions approx. 20°C

Key elements affecting lifting force

Please note that the working load may be lower subject to elements below, in order of importance:
  • Clearance – the presence of foreign body (paint, dirt, air) acts as an insulator, which reduces capacity steeply (even by 50% at 0.5 mm).
  • Pull-off angle – note that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the nominal value.
  • Base massiveness – too thin steel does not close the flux, causing part of the power to be lost to the other side.
  • Material composition – different alloys attracts identically. High carbon content weaken the interaction with the magnet.
  • Surface finish – ideal contact is possible only on polished steel. Rough texture reduce the real contact area, reducing force.
  • Thermal factor – high temperature weakens pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.

Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, however under shearing force the lifting capacity is smaller. Additionally, even a small distance between the magnet’s surface and the plate decreases the lifting capacity.

H&S for magnets
Safe operation

Exercise caution. Rare earth magnets act from a distance and snap with huge force, often faster than you can react.

Do not overheat magnets

Standard neodymium magnets (grade N) lose magnetization when the temperature surpasses 80°C. Damage is permanent.

Allergy Warning

Some people have a sensitization to Ni, which is the typical protective layer for neodymium magnets. Frequent touching can result in skin redness. We recommend wear safety gloves.

Dust explosion hazard

Drilling and cutting of NdFeB material carries a risk of fire hazard. Neodymium dust reacts violently with oxygen and is hard to extinguish.

Magnetic media

Device Safety: Strong magnets can damage payment cards and delicate electronics (pacemakers, medical aids, timepieces).

No play value

Strictly store magnets away from children. Choking hazard is significant, and the consequences of magnets clamping inside the body are very dangerous.

Crushing force

Danger of trauma: The pulling power is so immense that it can result in blood blisters, crushing, and broken bones. Protective gloves are recommended.

Fragile material

Neodymium magnets are sintered ceramics, meaning they are prone to chipping. Clashing of two magnets leads to them shattering into small pieces.

Keep away from electronics

Remember: neodymium magnets produce a field that confuses sensitive sensors. Maintain a safe distance from your phone, tablet, and navigation systems.

Medical interference

Individuals with a heart stimulator have to maintain an large gap from magnets. The magnetism can disrupt the operation of the implant.

Important! Learn more about hazards in the article: Magnet Safety Guide.