Product available Ships tomorrow

MW 4x5 / N38 - cylindrical magnet

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

cylindrical magnet

Catalog no 010077

GTIN/EAN: 5906301810766

5.00

Diameter Ø

4 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

0.47 g

Magnetization Direction

↑ axial

Load capacity

0.46 kg / 4.48 N

Magnetic Induction

573.83 mT / 5738 Gs

Coating

[NiCuNi] Nickel

product parameters »

0.320 ZŁ with VAT / pcs + price for transport

0.260 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs

0.260 ZŁ

0.320 ZŁ

price from 2400 pcs

0.244 ZŁ

0.301 ZŁ

price from 9700 pcs

0.229 ZŁ

0.281 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Not sure about your choice?

Give us a call +48 888 99 98 98 if you prefer send us a note through contact form the contact page.
Weight and appearance of neodymium magnets can be tested with our modular calculator.

Same-day processing for orders placed before 14:00.

Physical properties - MW 4x5 / N38 - cylindrical magnet

Specification / characteristics - MW 4x5 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010077
GTIN/EAN	5906301810766
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	4 mm [±0,1 mm]
Height	5 mm [±0,1 mm]
Weight	0.47 g
Magnetization Direction	↑ axial
Load capacity ~ ?	0.46 kg / 4.48 N
Magnetic Induction ~ ?	573.83 mT / 5738 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 4x5 / 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

Physical analysis of the product - data

The following information constitute the direct effect of a physical calculation. Values were calculated on models for the material Nd₂Fe₁₄B. Operational parameters may differ from theoretical values. Use these data as a reference point for designers.

Table 1: Static pull force (force vs distance) - power drop
MW 4x5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5727 Gs 572.7 mT	0.46 kg / 1.01 LBS 460.0 g / 4.5 N	weak grip
1 mm	3109 Gs 310.9 mT	0.14 kg / 0.30 LBS 135.6 g / 1.3 N	weak grip
2 mm	1577 Gs 157.7 mT	0.03 kg / 0.08 LBS 34.9 g / 0.3 N	weak grip
3 mm	856 Gs 85.6 mT	0.01 kg / 0.02 LBS 10.3 g / 0.1 N	weak grip
5 mm	323 Gs 32.3 mT	0.00 kg / 0.00 LBS 1.5 g / 0.0 N	weak grip
10 mm	66 Gs 6.6 mT	0.00 kg / 0.00 LBS 0.1 g / 0.0 N	weak grip
15 mm	24 Gs 2.4 mT	0.00 kg / 0.00 LBS 0.0 g / 0.0 N	weak grip
20 mm	11 Gs 1.1 mT	0.00 kg / 0.00 LBS 0.0 g / 0.0 N	weak grip
30 mm	4 Gs 0.4 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

Grip strength drops significantly with every mm of distance. Note that every additional insulation layer (e.g., contamination, paint, veneer) noticeably diminishes the holding power. Magnetic products hold optimally at the point of direct contact; distance kills the force. Observe how rapidly the load capacity plummet, when the magnet does not adhere tightly to the metal substrate. When designing the assembly, eliminate unnecessary gaps.

Table 2: Sliding load (wall)
MW 4x5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.09 kg / 0.20 LBS 92.0 g / 0.9 N
1 mm	Stal (~0.2)	0.03 kg / 0.06 LBS 28.0 g / 0.3 N
2 mm	Stal (~0.2)	0.01 kg / 0.01 LBS 6.0 g / 0.1 N
3 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 2.0 g / 0.0 N
5 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 0.0 g / 0.0 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

The following data defines the approximate holding capacity needed to initiate the sliding of the magnet down on a vertical steel plate (assuming standard friction coefficient). The holding force is a function of the separation distance between the magnet and the surface.

Table 3: Vertical assembly (shearing) - vertical pull
MW 4x5 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.14 kg / 0.30 LBS 138.0 g / 1.4 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.09 kg / 0.20 LBS 92.0 g / 0.9 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.05 kg / 0.10 LBS 46.0 g / 0.5 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	0.23 kg / 0.51 LBS 230.0 g / 2.3 N

When placing a element on a upright wall (e.g., a fridge), it you can count on just about 1/5 of nominal attraction strength. Gravity and a low friction coefficient influence the fact that holders slide down easier than they pull off. Want to create a wall mount? Note that the sliding force is significantly lower than the perpendicular breakaway force. On a smooth steel, the magnet will give way down under a noticeably lighter cargo. Using a rubber coating can significantly increase the grip.

Table 4: Steel thickness (saturation) - power losses
MW 4x5 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.05 kg / 0.10 LBS 46.0 g / 0.5 N
1 mm	25%	0.12 kg / 0.25 LBS 115.0 g / 1.1 N
2 mm	50%	0.23 kg / 0.51 LBS 230.0 g / 2.3 N
3 mm	75%	0.35 kg / 0.76 LBS 345.0 g / 3.4 N
5 mm	100%	0.46 kg / 1.01 LBS 460.0 g / 4.5 N
10 mm	100%	0.46 kg / 1.01 LBS 460.0 g / 4.5 N
11 mm	100%	0.46 kg / 1.01 LBS 460.0 g / 4.5 N
12 mm	100%	0.46 kg / 1.01 LBS 460.0 g / 4.5 N

A thin metal plate is unable to focus the entire magnetic field, which squanders power of the holder. Should you mount a strong magnet to a thin surface, the flux will pass right through and the holding will be smaller. To achieve the maximum of this magnet's potential, you require a sufficiently solid element of metal. The saturation phenomenon means that on delicate walls (e.g., appliance housings), the holder works worse. We suggest choosing the steel thickness according to the table below.

Table 5: Thermal resistance (material behavior) - resistance threshold
MW 4x5 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	0.46 kg / 1.01 LBS 460.0 g / 4.5 N	OK
40 °C	-2.2%	0.45 kg / 0.99 LBS 449.9 g / 4.4 N	OK
60 °C	-4.4%	0.44 kg / 0.97 LBS 439.8 g / 4.3 N	OK
80 °C	-6.6%	0.43 kg / 0.95 LBS 429.6 g / 4.2 N
100 °C	-28.8%	0.33 kg / 0.72 LBS 327.5 g / 3.2 N

Classic neodymiums change their properties power above the temperature limit. Watch out for overheating – excessive heat can irreversibly demagnetize this magnet. As the temperature rises, the magnet's power briefly lowers. Avoid using this magnet close to heaters higher than its operating temperature limit. Ignoring the limit will result in permanent loss of magnetism.

*Engineering note: Heat tolerance is determined by both grade, as well as the dimension ratios. Flat magnets (low Pc) may lose charge permanently at lower temperatures than taller cylinders. Red status in the table signals permanent field degradation for this specific geometry.

Table 6: Magnet-Magnet interaction (repulsion) - field range
MW 4x5 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Lateral Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	2.54 kg / 5.60 LBS 6 049 Gs	0.38 kg / 0.84 LBS 381 g / 3.7 N	N/A
1 mm	1.45 kg / 3.19 LBS 8 646 Gs	0.22 kg / 0.48 LBS 217 g / 2.1 N	1.30 kg / 2.87 LBS ~0 Gs
2 mm	0.75 kg / 1.65 LBS 6 218 Gs	0.11 kg / 0.25 LBS 112 g / 1.1 N	0.67 kg / 1.49 LBS ~0 Gs
3 mm	0.38 kg / 0.83 LBS 4 412 Gs	0.06 kg / 0.12 LBS 57 g / 0.6 N	0.34 kg / 0.75 LBS ~0 Gs
5 mm	0.10 kg / 0.23 LBS 2 299 Gs	0.02 kg / 0.03 LBS 15 g / 0.2 N	0.09 kg / 0.20 LBS ~0 Gs
10 mm	0.01 kg / 0.02 LBS 646 Gs	0.00 kg / 0.00 LBS 1 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
20 mm	0.00 kg / 0.00 LBS 132 Gs	0.00 kg / 0.00 LBS 0 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
50 mm	0.00 kg / 0.00 LBS 12 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 7 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 5 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 3 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 2 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

Two magnetic products attract each other from a significantly greater distance than a magnet and steel combination. The setup of two magnets creates a more powerful interaction and a further horizon of performance. Planning to create a powerful holder? Use a pair of magnets instead of a neodymium and a steel. Remember that when attracting two neodymiums, the pinch force is extreme. The levitation is marginally weaker than the connection force, but still impressive.
*The magnetic induction in repulsion mode drops to ~0 Gs in the exact middle of the gap (caused by magnetic field nullification).
* Results demonstrate sliding force of dual matching magnets (friction coefficient ~0.15 for Ni-Ni coating).

Table 7: Hazards (electronics) - precautionary measures
MW 4x5 / 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
Timepiece	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

Extremely neodym field poses a real danger to IT equipment as well as medical implants. These NdFeB products produce a flux that destroys function of digital equipment. Notice: the invisible magnetic field penetrates the body and glass. Increased vigilance must be taken by people with hearing aids and insulin pumps. Influence will be felt by: mechanical watches, remotes, speakers, and screens. Do not bring the product near payment cards, HDD media, or sensitive navigation tools.

Table 8: Collisions (kinetic energy) - collision effects
MW 4x5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	31.55 km/h (8.76 m/s)	0.02 J
30 mm	54.65 km/h (15.18 m/s)	0.05 J
50 mm	70.55 km/h (19.60 m/s)	0.09 J
100 mm	99.77 km/h (27.71 m/s)	0.18 J

NdFeB products are prone to chipping – a collision with steel can result in shattering. Control the attraction moment – a neodymium left loose speeds with massive force. Kinetic force can trigger coating fragments or painful pinches to fingers. Always hold the magnet during installation so it doesn't hit with great force against the metal. A contact at a velocity of dozens of km/h ends with a crack of the neodymium. Wear eye protection when working with large magnets.

Table 9: Corrosion resistance
MW 4x5 / 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. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Electrical data (P_c)
MW 4x5 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	760 Mx	7.6 µWb
P_c Coefficient	1.00	High (Stable)

Flux value passing through the magnet pole. Key data when building generators and motors. The P_c coefficient defines the working geometry.

Table 11: Physics of underwater searching
MW 4x5 / N38

Environment	Effective steel pull	Effect
Air (land)	0.46 kg	Standard
Water (riverbed)	0.53 kg (+0.07 kg buoyancy gain)	+14.5%

Corrosion warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.

In water, the magnet feels stronger thanks to Archimedes' principle. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Vertical hold

*Caution: On a vertical surface, the magnet holds only approx. 20-30% of its max power.

2. Plate thickness effect

*Thin metal sheet (e.g. computer case) drastically reduces the holding force.

3. Temperature resistance

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

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 1.00

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 specification and ecology

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%

Ecology and recycling (GPSR)

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: 010077-2026

Measurement Calculator

Force (pull)

Kilograms (kg)

lbs

Magnetic Field

Simply complete one field, and the converter compute everything else for you.

See more products

Product available Ships tomorrow

MPL 40x18x10 / N38 - lamellar magnet

30.75 ZŁ brutto / pcs

Product available Ships tomorrow

MW 16x4 / N38 - cylindrical magnet

3.39 ZŁ brutto / pcs

Product available Ships tomorrow

UMP 94x40 [3xM10] GW F550 Silver Black Lina / N52 - search holder

400.00 ZŁ brutto / pcs

Product available Ships tomorrow

SM 25x400 [2xM8] / N52 - magnetic separator

1205.40 ZŁ brutto / pcs

This product is an extremely powerful cylindrical magnet, produced from advanced NdFeB material, which, with dimensions of Ø4x5 mm, guarantees optimal power. This specific item boasts an accuracy of ±0.1mm and professional build quality, making it an ideal solution for the most demanding engineers and designers. As a cylindrical magnet with impressive force (approx. 0.46 kg), this product is in stock from our warehouse in Poland, ensuring lightning-fast order fulfillment. Moreover, its Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.

It finds application in DIY projects, advanced robotics, and broadly understood industry, serving as a fastening or actuating element. Thanks to the pull force of 4.48 N with a weight of only 0.47 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., 4.1 mm) using epoxy glues. To ensure long-term durability in industry, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.

Magnets N38 are strong enough for 90% of applications in modeling and machine building, where extreme miniaturization with maximum force is not required. If you need even stronger magnets in the same volume (Ø4x5), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our warehouse.

The presented product is a neodymium magnet with precisely defined parameters: diameter 4 mm and height 5 mm. The value of 4.48 N means that the magnet is capable of holding a weight many times exceeding its own mass of 0.47 g. The product has a [NiCuNi] coating, which secures it against external factors, giving it an aesthetic, silvery shine.

This rod magnet is magnetized axially (along the height of 5 mm), which means that the N and S poles are located on the flat, circular surfaces. Such an arrangement is standard 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 through the diameter if your project requires it.

Advantages and disadvantages of Nd₂Fe₁₄B magnets.

Strengths

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:

They virtually do not lose power, because even after 10 years the decline in efficiency is only ~1% (according to literature),
They are noted for resistance to demagnetization induced by external field influence,
Thanks to the shiny finish, the coating of nickel, gold, or silver gives an professional appearance,
Magnets possess impressive magnetic induction on the working surface,
Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
Due to the ability of flexible shaping and customization to specialized solutions, NdFeB magnets can be manufactured in a variety of shapes and sizes, which makes them more universal,
Wide application in electronics industry – they are commonly used in hard drives, brushless drives, precision medical tools, as well as multitasking production systems.
Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,

Weaknesses

Characteristics of disadvantages of neodymium magnets: tips and applications.

They are fragile upon heavy impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only shields the magnet but also increases its resistance to damage
Neodymium magnets decrease their power 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
They oxidize in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
Limited possibility of making threads in the magnet and complex shapes - preferred is cover - mounting mechanism.
Possible danger to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child health protection. Additionally, small elements of these devices can disrupt the diagnostic process medical after entering the body.
High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which hinders application in large quantities

Lifting parameters

Breakaway strength of the magnet in ideal conditions – what affects it?

The lifting capacity listed is a measurement result performed under the following configuration:

on a plate made of mild steel, effectively closing the magnetic flux
possessing a massiveness of min. 10 mm to avoid saturation
characterized by lack of roughness
with total lack of distance (without coatings)
for force acting at a right angle (pull-off, not shear)
at standard ambient temperature

Magnet lifting force in use – key factors

Real force is influenced by specific conditions, such as (from priority):

Clearance – the presence of foreign body (paint, dirt, gap) interrupts the magnetic circuit, which reduces power steeply (even by 50% at 0.5 mm).
Force direction – catalog parameter refers to detachment vertically. When attempting to slide, the magnet exhibits much less (typically approx. 20-30% of maximum force).
Element thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet limits the lifting capacity (the magnet "punches through" it).
Steel grade – ideal substrate is high-permeability steel. Hardened steels may have worse magnetic properties.
Plate texture – smooth surfaces guarantee perfect abutment, which improves field saturation. Uneven metal weaken the grip.
Heat – neodymium magnets have a sensitivity to temperature. At higher temperatures they are weaker, and in frost gain strength (up to a certain limit).

Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, whereas under shearing force the load capacity is reduced by as much as 5 times. Additionally, even a minimal clearance between the magnet and the plate reduces the holding force.

H&S for magnets

Protect data

Do not bring magnets close to a purse, computer, or screen. The magnetism can permanently damage these devices and wipe information from cards.

Danger to the youngest

Neodymium magnets are not toys. Eating several magnets may result in them connecting inside the digestive tract, which poses a critical condition and necessitates immediate surgery.

Impact on smartphones

Navigation devices and smartphones are extremely susceptible to magnetism. Close proximity with a powerful NdFeB magnet can ruin the sensors in your phone.

Hand protection

Protect your hands. Two large magnets will snap together immediately with a force of several hundred kilograms, crushing everything in their path. Exercise extreme caution!

Fire risk

Fire warning: Neodymium dust is explosive. Avoid machining magnets in home conditions as this may cause fire.

Shattering risk

Despite the nickel coating, the material is delicate and not impact-resistant. Avoid impacts, as the magnet may shatter into hazardous fragments.

Powerful field

Handle with care. Neodymium magnets act from a distance and connect with huge force, often quicker than you can move away.

Allergic reactions

Warning for allergy sufferers: The Ni-Cu-Ni coating contains nickel. If skin irritation happens, cease handling magnets and wear gloves.

Implant safety

People with a pacemaker have to keep an safe separation from magnets. The magnetic field can interfere with the operation of the implant.

Heat sensitivity

Standard neodymium magnets (grade N) undergo demagnetization when the temperature surpasses 80°C. The loss of strength is permanent.

Important! More info about risks in the article: Magnet Safety Guide.

MW 4x5 / N38 - cylindrical magnet

Physical properties - MW 4x5 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical analysis of the product - data

Table 1: Static pull force (force vs distance) - power drop MW 4x5 / N38

Table 2: Sliding load (wall) MW 4x5 / N38

Table 3: Vertical assembly (shearing) - vertical pull MW 4x5 / N38

Table 4: Steel thickness (saturation) - power losses MW 4x5 / N38

Table 5: Thermal resistance (material behavior) - resistance threshold MW 4x5 / N38

Table 6: Magnet-Magnet interaction (repulsion) - field range MW 4x5 / N38

Table 7: Hazards (electronics) - precautionary measures MW 4x5 / N38

Table 8: Collisions (kinetic energy) - collision effects MW 4x5 / N38

Table 9: Corrosion resistance MW 4x5 / N38

Table 10: Electrical data (Pc) MW 4x5 / N38

Table 11: Physics of underwater searching MW 4x5 / N38

1. Vertical hold

2. Plate thickness effect

3. Temperature resistance

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

Elemental analysis

Ecology and recycling (GPSR)

Force (pull)

Magnetic Field

See more products

MPL 40x18x10 / N38 - lamellar magnet

MW 16x4 / N38 - cylindrical magnet

UMP 94x40 [3xM10] GW F550 Silver Black Lina / N52 - search holder

SM 25x400 [2xM8] / N52 - magnetic separator

Advantages and disadvantages of Nd2Fe14B magnets.

Strengths

Weaknesses

Lifting parameters

Breakaway strength of the magnet in ideal conditions – what affects it?

Magnet lifting force in use – key factors

H&S for magnets

Protect data

Danger to the youngest

Impact on smartphones

Hand protection

Fire risk

Shattering risk

Powerful field

Allergic reactions

Implant safety

Heat sensitivity

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (force vs distance) - power drop
MW 4x5 / N38

Table 2: Sliding load (wall)
MW 4x5 / N38

Table 3: Vertical assembly (shearing) - vertical pull
MW 4x5 / N38

Table 4: Steel thickness (saturation) - power losses
MW 4x5 / N38

Table 5: Thermal resistance (material behavior) - resistance threshold
MW 4x5 / N38

Table 6: Magnet-Magnet interaction (repulsion) - field range
MW 4x5 / N38

Table 7: Hazards (electronics) - precautionary measures
MW 4x5 / N38

Table 8: Collisions (kinetic energy) - collision effects
MW 4x5 / N38

Table 9: Corrosion resistance
MW 4x5 / N38

Table 10: Electrical data (P_c)
MW 4x5 / N38

Table 11: Physics of underwater searching
MW 4x5 / N38

Advantages and disadvantages of Nd₂Fe₁₄B magnets.