Product on order Ships in 3-5 days

MW 19x4 / N38 - cylindrical magnet

Name: Dhit sp. z o.o.
Address: Kościuszki 6A, Ożarów Mazowiecki, Poland, 05-850, PL
Telephone: +48 22 499 98 98
Price range: PLN 1-6500
Rating: 5

cylindrical magnet

Catalog no 010038

GTIN/EAN: 5906301810377

Diameter Ø

19 mm [±0,1 mm]

Height

4 mm [±0,1 mm]

Weight

8.51 g

Magnetization Direction

↑ axial

Load capacity

4.96 kg / 48.62 N

Magnetic Induction

240.51 mT / 2405 Gs

Coating

[Zn] Zinc

product specifications »

4.80 ZŁ with VAT / pcs + price for transport

3.90 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs

3.90 ZŁ

4.80 ZŁ

price from 200 pcs

3.67 ZŁ

4.51 ZŁ

price from 650 pcs

3.43 ZŁ

4.22 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Need help making a decision?

Call us +48 888 99 98 98 if you prefer send us a note by means of our online form the contact section.
Lifting power and form of a neodymium magnet can be calculated using our power calculator.

Orders placed before 14:00 will be shipped the same business day.

Technical data - MW 19x4 / N38 - cylindrical magnet

Specification / characteristics - MW 19x4 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010038
GTIN/EAN	5906301810377
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	19 mm [±0,1 mm]
Height	4 mm [±0,1 mm]
Weight	8.51 g
Magnetization Direction	↑ axial
Load capacity ~ ?	4.96 kg / 48.62 N
Magnetic Induction ~ ?	240.51 mT / 2405 Gs
Coating	[Zn] Zinc
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 19x4 / 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

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 modeling of the assembly - report

Presented data constitute the result of a physical simulation. Values were calculated on algorithms for the class Nd₂Fe₁₄B. Real-world conditions may differ. Treat these calculations as a supplementary guide for designers.

Table 1: Static pull force (pull vs distance) - characteristics
MW 19x4 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	2405 Gs 240.5 mT	4.96 kg / 10.93 LBS 4960.0 g / 48.7 N	medium risk
1 mm	2239 Gs 223.9 mT	4.30 kg / 9.48 LBS 4299.0 g / 42.2 N	medium risk
2 mm	2033 Gs 203.3 mT	3.55 kg / 7.82 LBS 3547.4 g / 34.8 N	medium risk
3 mm	1811 Gs 181.1 mT	2.81 kg / 6.20 LBS 2813.0 g / 27.6 N	medium risk
5 mm	1376 Gs 137.6 mT	1.63 kg / 3.58 LBS 1625.2 g / 15.9 N	weak grip
10 mm	635 Gs 63.5 mT	0.35 kg / 0.76 LBS 346.3 g / 3.4 N	weak grip
15 mm	308 Gs 30.8 mT	0.08 kg / 0.18 LBS 81.2 g / 0.8 N	weak grip
20 mm	164 Gs 16.4 mT	0.02 kg / 0.05 LBS 23.2 g / 0.2 N	weak grip
30 mm	61 Gs 6.1 mT	0.00 kg / 0.01 LBS 3.1 g / 0.0 N	weak grip
50 mm	15 Gs 1.5 mT	0.00 kg / 0.00 LBS 0.2 g / 0.0 N	weak grip

Magnetic force decreases drastically with every subsequent millimeter of distance. Keep in mind that every additional insulation layer (e.g., contamination, paint, veneer) noticeably weakens the grip. Magnets operate optimally at the point of direct contact; distance weakens the force. Observe how rapidly the load capacity plummet, when the product does not adhere flatly to the steel surface. When calculating the mounting, avoid redundant distances.

Table 2: Vertical force (wall)
MW 19x4 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.99 kg / 2.19 LBS 992.0 g / 9.7 N
1 mm	Stal (~0.2)	0.86 kg / 1.90 LBS 860.0 g / 8.4 N
2 mm	Stal (~0.2)	0.71 kg / 1.57 LBS 710.0 g / 7.0 N
3 mm	Stal (~0.2)	0.56 kg / 1.24 LBS 562.0 g / 5.5 N
5 mm	Stal (~0.2)	0.33 kg / 0.72 LBS 326.0 g / 3.2 N
10 mm	Stal (~0.2)	0.07 kg / 0.15 LBS 70.0 g / 0.7 N
15 mm	Stal (~0.2)	0.02 kg / 0.04 LBS 16.0 g / 0.2 N
20 mm	Stal (~0.2)	0.00 kg / 0.01 LBS 4.0 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

The following data presents the theoretical shear load necessary to initiate the slippage of the magnet down against a upright steel plate (considering typical friction coefficient). This value is relative to the gap size between the magnet and the surface.

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MW 19x4 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	1.49 kg / 3.28 LBS 1488.0 g / 14.6 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.99 kg / 2.19 LBS 992.0 g / 9.7 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.50 kg / 1.09 LBS 496.0 g / 4.9 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	2.48 kg / 5.47 LBS 2480.0 g / 24.3 N

When mounting a magnet on a vertical surface (e.g., a car body), it will maintain just about 20%-30% of its maximum pull force. Gravity as well as a weak degree of grip mean that magnets slip easier than they detach. Want to create a wall mount? Remember that the sliding force is significantly lower than the maximum static pull force. On a slippery surface, the magnet will give way down under a significantly smaller cargo. Application of an anti-slip pad can significantly raise the stability.

Table 4: Material efficiency (saturation) - sheet metal selection
MW 19x4 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.50 kg / 1.09 LBS 496.0 g / 4.9 N
1 mm	25%	1.24 kg / 2.73 LBS 1240.0 g / 12.2 N
2 mm	50%	2.48 kg / 5.47 LBS 2480.0 g / 24.3 N
3 mm	75%	3.72 kg / 8.20 LBS 3720.0 g / 36.5 N
5 mm	100%	4.96 kg / 10.93 LBS 4960.0 g / 48.7 N
10 mm	100%	4.96 kg / 10.93 LBS 4960.0 g / 48.7 N
11 mm	100%	4.96 kg / 10.93 LBS 4960.0 g / 48.7 N
12 mm	100%	4.96 kg / 10.93 LBS 4960.0 g / 48.7 N

A thin metal plate is incapable of focus the entire magnetic field, which weakens actual performance of the magnet. Should you install a neodymium to a thin surface, the flux will pass right through and the attraction force will be weaker. To achieve full efficiency of this neodymium's potential, you need a suitably thick piece of metal. The saturation phenomenon causes that on sheet metal structures (e.g., appliance housings), the product shows lower pull force. We suggest choosing the steel cross-section according to the table below.

Table 5: Working in heat (material behavior) - power drop
MW 19x4 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	4.96 kg / 10.93 LBS 4960.0 g / 48.7 N	OK
40 °C	-2.2%	4.85 kg / 10.69 LBS 4850.9 g / 47.6 N	OK
60 °C	-4.4%	4.74 kg / 10.45 LBS 4741.8 g / 46.5 N
80 °C	-6.6%	4.63 kg / 10.21 LBS 4632.6 g / 45.4 N
100 °C	-28.8%	3.53 kg / 7.79 LBS 3531.5 g / 34.6 N

Ordinary NdFeB products change their properties parameters after exceeding the maximum temperature. Protect against heat – excessive heat can permanently demagnetize this product. As the temperature rises, the neodymium's force briefly drops. Avoid using this magnet close to heaters higher than its operating temperature limit. Too high temperature will result in destruction of magnetic properties.

*Important note: Temperature resistance depends not only on the material grade, but also on the magnet's shape. Thin magnets (low permeance coefficient) risk losing magnetic properties sooner than taller cylinders. Red status in the table signals permanent field degradation for this specific geometry.

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 19x4 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Lateral Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	10.11 kg / 22.28 LBS 3 990 Gs	1.52 kg / 3.34 LBS 1516 g / 14.9 N	N/A
1 mm	9.48 kg / 20.89 LBS 4 657 Gs	1.42 kg / 3.13 LBS 1421 g / 13.9 N	8.53 kg / 18.80 LBS ~0 Gs
2 mm	8.76 kg / 19.31 LBS 4 477 Gs	1.31 kg / 2.90 LBS 1314 g / 12.9 N	7.88 kg / 17.38 LBS ~0 Gs
3 mm	8.00 kg / 17.64 LBS 4 279 Gs	1.20 kg / 2.65 LBS 1200 g / 11.8 N	7.20 kg / 15.88 LBS ~0 Gs
5 mm	6.47 kg / 14.25 LBS 3 846 Gs	0.97 kg / 2.14 LBS 970 g / 9.5 N	5.82 kg / 12.83 LBS ~0 Gs
10 mm	3.31 kg / 7.30 LBS 2 753 Gs	0.50 kg / 1.10 LBS 497 g / 4.9 N	2.98 kg / 6.57 LBS ~0 Gs
20 mm	0.71 kg / 1.56 LBS 1 271 Gs	0.11 kg / 0.23 LBS 106 g / 1.0 N	0.64 kg / 1.40 LBS ~0 Gs
50 mm	0.02 kg / 0.04 LBS 193 Gs	0.00 kg / 0.01 LBS 2 g / 0.0 N	0.01 kg / 0.03 LBS ~0 Gs
60 mm	0.01 kg / 0.01 LBS 121 Gs	0.00 kg / 0.00 LBS 1 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
70 mm	0.00 kg / 0.01 LBS 81 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 56 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 41 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 30 Gs	0.00 kg / 0.00 LBS 0 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs

Two magnetic products interact from a much further distance than a magnet and sheet setup. The connection of magnet-to-magnet produces a massive flux and a further horizon of performance. Planning to create a solid fastener? Utilize two neodymiums instead of one magnet and a steel. Be careful that when attracting two neodymiums, the pinch force is massive. The repulsion force is slightly lower than the attraction, but still large.
*Flux density for N-N configuration is approximately ~0 Gs at the geometric center of the gap (due to field cancellation).
Note: Calculations demonstrate sliding force of a pair of matching magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Hazards (implants) - warnings
MW 19x4 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	7.5 cm
Hearing aid	10 Gs (1.0 mT)	6.0 cm
Mechanical watch	20 Gs (2.0 mT)	5.0 cm
Phone / Smartphone	40 Gs (4.0 mT)	4.0 cm
Car key	50 Gs (5.0 mT)	3.5 cm
Payment card	400 Gs (40.0 mT)	1.5 cm
HDD hard drive	600 Gs (60.0 mT)	1.5 cm

Extremely neodym field is a large risk to electronic devices as well as pacemakers. These magnets produce a flux that disrupts operation of sensitive medical devices. Remember: the unseen radiation passes through tissues and glass. Increased vigilance must be exercised by people with hearing aids and drug dispensers. Influence will be felt by: mechanical watches, car keys, membranes, and displays. Avoid contact with magnetic cards, HDD media, or precise measuring instruments.

Table 8: Dynamics (kinetic energy) - warning
MW 19x4 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	25.39 km/h (7.05 m/s)	0.21 J
30 mm	42.19 km/h (11.72 m/s)	0.58 J
50 mm	54.44 km/h (15.12 m/s)	0.97 J
100 mm	76.99 km/h (21.39 m/s)	1.95 J

Neodymium magnets are prone to chipping – a violent impact against metal causes immediate chipping. Watch the impact speed – a neodymium left loose becomes dangerous. Striking energy can trigger coating fragments or injury to skin. Always hold the magnet during mounting 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 magnet. Wear safety glasses when working with powerful specimens.

Table 9: Anti-corrosion coating durability
MW 19x4 / N38

Technical parameter	Value / Description
Coating type	[Zn] Zinc
Layer structure	Zn (Zinc)
Layer thickness	8-15 µm
Salt spray test (SST) ?	48 h
Recommended environment	Indoors / Garage

The SST (salt spray test) is an industry standard for determining coating lifespan in harsh conditions. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Construction data (Flux)
MW 19x4 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	7 831 Mx	78.3 µWb
P_c Coefficient	0.30	Low (Flat)

Flux value emitted by the pole surface. Essential parameter when building generators as well as sensors. P_c value determines the magnet's operating point.

Table 11: Physics of underwater searching
MW 19x4 / N38

Environment	Effective steel pull	Effect
Air (land)	4.96 kg	Standard
Water (riverbed)	5.68 kg (+0.72 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.

Water displaces steel, making heavy objects slightly lighter. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

1. Sliding resistance

*Caution: On a vertical surface, the magnet holds only a fraction of its nominal pull.

2. Steel saturation

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

3. Temperature resistance

*For N38 material, the critical limit is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.30

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 P_c (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 P_c 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

Material specification

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: 010038-2026

Measurement Calculator

Magnet pull force

Force in kg

Pounds (lbs)

Magnetic Field

Gauss (Gs)

Induction (T)

Insert a number in any box, and all other values will convert on the fly.

Other offers

Product on order Ships in 3-5 days

MPL 35x35x10 / N38 - lamellar magnet

35.10 ZŁ brutto / pcs

Product on order Ships in 3-5 days

MP 41x15x10 / N38 - ring magnet

50.00 ZŁ brutto / pcs

Product on order Ships in 3-5 days

MW 3x6 / N38 - cylindrical magnet

0.295 ZŁ brutto / pcs

Product on order Ships in 3-5 days

MW 8x20 / N38 - cylindrical magnet

4.60 ZŁ brutto / pcs

This product is an incredibly powerful cylindrical magnet, made from advanced NdFeB material, which, at dimensions of Ø19x4 mm, guarantees optimal power. This specific item features an accuracy of ±0.1mm and professional build quality, making it an excellent solution for professional engineers and designers. As a cylindrical magnet with impressive force (approx. 4.96 kg), this product is in stock from our warehouse in Poland, ensuring quick order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating secures it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.

This model is ideal for building electric motors, advanced Hall effect sensors, and efficient filters, where field concentration on a small surface counts. Thanks to the high power of 48.62 N with a weight of only 8.51 g, this rod is indispensable in electronics and wherever every gram matters.

Due to the delicate structure of the ceramic sinter, we absolutely advise against force-fitting (so-called press-fit), as this risks immediate cracking of this precision component. To ensure stability in automation, anaerobic resins are used, which are safe for nickel 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 (Ø19x4), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our store.

This model is characterized by dimensions Ø19x4 mm, which, at a weight of 8.51 g, makes it an element with impressive magnetic energy density. The key parameter here is the lifting capacity amounting to approximately 4.96 kg (force ~48.62 N), which, with such defined dimensions, proves the high power of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface against oxidation, giving it an aesthetic, silvery shine.

This rod magnet is magnetized axially (along the height of 4 mm), which means that the N and S poles are located on the flat, circular surfaces. 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 as well as disadvantages of neodymium magnets.

Advantages

Besides their high retention, neodymium magnets are valued for these benefits:

They do not lose magnetism, even over nearly ten years – the drop in power is only ~1% (based on measurements),
They feature excellent resistance to magnetic field loss when exposed to external fields,
In other words, due to the glossy surface of gold, the element gains visual value,
Magnets exhibit very high magnetic induction on the active area,
Thanks to resistance to high temperature, they are capable of working (depending on the form) even at temperatures up to 230°C and higher...
Possibility of accurate shaping and adjusting to complex applications,
Wide application in innovative solutions – they are utilized in data components, electric motors, medical devices, and modern systems.
Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Disadvantages

Disadvantages of NdFeB magnets:

They are prone to damage upon heavy impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only protects the magnet but also improves its resistance to damage
Neodymium magnets lose their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
Magnets exposed to a humid environment can rust. Therefore during using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material protecting against moisture
We recommend casing - magnetic mount, due to difficulties in producing nuts inside the magnet and complex shapes.
Health risk to health – tiny shards of magnets can be dangerous, in case of ingestion, which is particularly important in the context of child health protection. Additionally, tiny parts of these magnets are able to be problematic in diagnostics 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

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

Magnet power is the result of a measurement for ideal contact conditions, assuming:

on a plate made of structural steel, effectively closing the magnetic field
with a thickness no less than 10 mm
with an ground touching surface
without the slightest insulating layer between the magnet and steel
during pulling in a direction vertical to the mounting surface
in neutral thermal conditions

Impact of factors on magnetic holding capacity in practice

Holding efficiency impacted by working environment parameters, such as (from priority):

Distance (betwixt the magnet and the plate), because even a microscopic distance (e.g. 0.5 mm) can cause a reduction in force by up to 50% (this also applies to varnish, rust or debris).
Pull-off angle – note that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the nominal value.
Plate thickness – too thin plate does not accept the full field, causing part of the flux to be lost to the other side.
Metal type – not every steel reacts the same. High carbon content weaken the attraction effect.
Surface finish – ideal contact is obtained only on polished steel. Any scratches and bumps create air cushions, reducing force.
Temperature influence – high temperature reduces pulling force. Exceeding the limit temperature can permanently damage the magnet.

Holding force was measured on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a minimal clearance between the magnet and the plate reduces the load capacity.

Warnings

Bodily injuries

Danger of trauma: The attraction force is so great that it can cause hematomas, crushing, and broken bones. Use thick gloves.

Cards and drives

Equipment safety: Neodymium magnets can ruin data carriers and sensitive devices (pacemakers, hearing aids, timepieces).

Avoid contact if allergic

Allergy Notice: The nickel-copper-nickel coating contains nickel. If redness occurs, cease working with magnets and wear gloves.

Fragile material

Beware of splinters. Magnets can explode upon uncontrolled impact, ejecting sharp fragments into the air. Eye protection is mandatory.

Flammability

Powder produced during cutting of magnets is flammable. Avoid drilling into magnets unless you are an expert.

Caution required

Be careful. Rare earth magnets act from a distance and snap with huge force, often quicker than you can move away.

Phone sensors

GPS units and smartphones are highly sensitive to magnetic fields. Close proximity with a strong magnet can permanently damage the internal compass in your phone.

Warning for heart patients

Medical warning: Neodymium magnets can turn off pacemakers and defibrillators. Do not approach if you have electronic implants.

Swallowing risk

Absolutely store magnets away from children. Choking hazard is high, and the effects of magnets clamping inside the body are fatal.

Operating temperature

Regular neodymium magnets (N-type) lose power when the temperature goes above 80°C. This process is irreversible.

Danger! Details about hazards in the article: Magnet Safety Guide.

MW 19x4 / N38 - cylindrical magnet

Technical data - MW 19x4 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering modeling of the assembly - report

Table 1: Static pull force (pull vs distance) - characteristics MW 19x4 / N38

Table 2: Vertical force (wall) MW 19x4 / N38

Table 3: Wall mounting (shearing) - behavior on slippery surfaces MW 19x4 / N38

Table 4: Material efficiency (saturation) - sheet metal selection MW 19x4 / N38

Table 5: Working in heat (material behavior) - power drop MW 19x4 / N38

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system MW 19x4 / N38

Table 7: Hazards (implants) - warnings MW 19x4 / N38

Table 8: Dynamics (kinetic energy) - warning MW 19x4 / N38

Table 9: Anti-corrosion coating durability MW 19x4 / N38

Table 10: Construction data (Flux) MW 19x4 / N38

Table 11: Physics of underwater searching MW 19x4 / N38

1. Sliding resistance

2. Steel saturation

3. Temperature resistance

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

Material specification

Environmental data

Magnet pull force

Magnetic Field

Other offers

MPL 35x35x10 / N38 - lamellar magnet

MP 41x15x10 / N38 - ring magnet

MW 3x6 / N38 - cylindrical magnet

MW 8x20 / N38 - cylindrical magnet

Advantages as well as disadvantages of neodymium magnets.

Advantages

Disadvantages

Pull force analysis

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

Impact of factors on magnetic holding capacity in practice

Warnings

Bodily injuries

Cards and drives

Avoid contact if allergic

Fragile material

Flammability

Caution required

Phone sensors

Warning for heart patients

Swallowing risk

Operating temperature

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (pull vs distance) - characteristics
MW 19x4 / N38

Table 2: Vertical force (wall)
MW 19x4 / N38

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MW 19x4 / N38

Table 4: Material efficiency (saturation) - sheet metal selection
MW 19x4 / N38

Table 5: Working in heat (material behavior) - power drop
MW 19x4 / N38

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 19x4 / N38

Table 7: Hazards (implants) - warnings
MW 19x4 / N38

Table 8: Dynamics (kinetic energy) - warning
MW 19x4 / N38

Table 9: Anti-corrosion coating durability
MW 19x4 / N38

Table 10: Construction data (Flux)
MW 19x4 / N38

Table 11: Physics of underwater searching
MW 19x4 / N38