Product available Ships tomorrow

MW 20x35 / 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 010043

GTIN/EAN: 5906301810421

5.00

Diameter Ø

20 mm [±0,1 mm]

Height

35 mm [±0,1 mm]

Weight

82.47 g

Magnetization Direction

↑ axial

Load capacity

9.58 kg / 93.97 N

Magnetic Induction

595.77 mT / 5958 Gs

Coating

[NiCuNi] Nickel

product parameters »

49.52 ZŁ with VAT / pcs + price for transport

40.26 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs

40.26 ZŁ

49.52 ZŁ

price from 20 pcs

37.84 ZŁ

46.55 ZŁ

price from 70 pcs

35.43 ZŁ

43.58 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Not sure which magnet to buy?

Give us a call +48 22 499 98 98 otherwise let us know by means of form the contact form page.
Weight and structure of a neodymium magnet can be calculated on our magnetic mass calculator.

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

Detailed specification - MW 20x35 / N38 - cylindrical magnet

Specification / characteristics - MW 20x35 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010043
GTIN/EAN	5906301810421
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	20 mm [±0,1 mm]
Height	35 mm [±0,1 mm]
Weight	82.47 g
Magnetization Direction	↑ axial
Load capacity ~ ?	9.58 kg / 93.97 N
Magnetic Induction ~ ?	595.77 mT / 5958 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 20x35 / 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 product - technical parameters

These data constitute the outcome of a engineering calculation. Values are based on algorithms for the material Nd₂Fe₁₄B. Real-world performance may differ. Use these calculations as a supplementary guide for designers.

Table 1: Static force (force vs distance) - power drop
MW 20x35 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5955 Gs 595.5 mT	9.58 kg / 21.12 lbs 9580.0 g / 94.0 N	warning
1 mm	5357 Gs 535.7 mT	7.75 kg / 17.09 lbs 7751.3 g / 76.0 N	warning
2 mm	4769 Gs 476.9 mT	6.14 kg / 13.55 lbs 6144.2 g / 60.3 N	warning
3 mm	4214 Gs 421.4 mT	4.80 kg / 10.58 lbs 4797.3 g / 47.1 N	warning
5 mm	3242 Gs 324.2 mT	2.84 kg / 6.26 lbs 2839.3 g / 27.9 N	warning
10 mm	1668 Gs 166.8 mT	0.75 kg / 1.66 lbs 751.8 g / 7.4 N	low risk
15 mm	921 Gs 92.1 mT	0.23 kg / 0.51 lbs 229.1 g / 2.2 N	low risk
20 mm	555 Gs 55.5 mT	0.08 kg / 0.18 lbs 83.1 g / 0.8 N	low risk
30 mm	246 Gs 24.6 mT	0.02 kg / 0.04 lbs 16.4 g / 0.2 N	low risk
50 mm	78 Gs 7.8 mT	0.00 kg / 0.00 lbs 1.6 g / 0.0 N	low risk

Grip strength weakens sharply per each millimeter of gap. Keep in mind that every additional insulation layer (e.g., contamination, paint, rust) strongly weakens the grip. Neodymiums operate most effectively at the point of direct contact; gap drastically cuts the force. Analyze how flashily the pull force drop, when the magnet does not touch tightly to the metal substrate. When calculating the arrangement, eliminate additional spacers.

Table 2: Vertical force (vertical surface)
MW 20x35 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.92 kg / 4.22 lbs 1916.0 g / 18.8 N
1 mm	Stal (~0.2)	1.55 kg / 3.42 lbs 1550.0 g / 15.2 N
2 mm	Stal (~0.2)	1.23 kg / 2.71 lbs 1228.0 g / 12.0 N
3 mm	Stal (~0.2)	0.96 kg / 2.12 lbs 960.0 g / 9.4 N
5 mm	Stal (~0.2)	0.57 kg / 1.25 lbs 568.0 g / 5.6 N
10 mm	Stal (~0.2)	0.15 kg / 0.33 lbs 150.0 g / 1.5 N
15 mm	Stal (~0.2)	0.05 kg / 0.10 lbs 46.0 g / 0.5 N
20 mm	Stal (~0.2)	0.02 kg / 0.04 lbs 16.0 g / 0.2 N
30 mm	Stal (~0.2)	0.00 kg / 0.01 lbs 4.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 lbs 0.0 g / 0.0 N

The table below calculates the theoretical weight limit sufficient to start the slippage of the magnet downwards along a upright steel plate (assuming typical friction coefficient). The holding force varies with the air gap between the magnet and the metal.

Table 3: Vertical assembly (shearing) - vertical pull
MW 20x35 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	2.87 kg / 6.34 lbs 2874.0 g / 28.2 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.92 kg / 4.22 lbs 1916.0 g / 18.8 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.96 kg / 2.11 lbs 958.0 g / 9.4 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	4.79 kg / 10.56 lbs 4790.0 g / 47.0 N

When placing a element on a vertical wall (e.g., a fridge), it you can count on just about 20%-30% of its nominal power. Gravity as well as a weak degree of grip mean that products slide down easier than they pull off. Want to create a wall mount? Consider that the shear force is much weaker than the perpendicular breakaway force. On a smooth steel, the holder will give way down under a noticeably lighter cargo. Application of an anti-slip layer can drastically raise the stability.

Table 4: Steel thickness (substrate influence) - power losses
MW 20x35 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.96 kg / 2.11 lbs 958.0 g / 9.4 N
1 mm	25%	2.40 kg / 5.28 lbs 2395.0 g / 23.5 N
2 mm	50%	4.79 kg / 10.56 lbs 4790.0 g / 47.0 N
3 mm	75%	7.19 kg / 15.84 lbs 7185.0 g / 70.5 N
5 mm	100%	9.58 kg / 21.12 lbs 9580.0 g / 94.0 N
10 mm	100%	9.58 kg / 21.12 lbs 9580.0 g / 94.0 N
11 mm	100%	9.58 kg / 21.12 lbs 9580.0 g / 94.0 N
12 mm	100%	9.58 kg / 21.12 lbs 9580.0 g / 94.0 N

A too thin steel cannot absorb the entire magnetic field, which squanders power of the holder. If you mount a strong magnet to a weak sheet, the magnetism will penetrate right through and the holding will be smaller. To squeeze full efficiency of this neodymium's potential, you require a sufficiently solid element of metal. The saturation phenomenon means that on thin elements (e.g., thin profiles), the magnet shows lower pull force. We recommend selecting the steel thickness based on the following data.

Table 5: Thermal resistance (stability) - power drop
MW 20x35 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	9.58 kg / 21.12 lbs 9580.0 g / 94.0 N	OK
40 °C	-2.2%	9.37 kg / 20.66 lbs 9369.2 g / 91.9 N	OK
60 °C	-4.4%	9.16 kg / 20.19 lbs 9158.5 g / 89.8 N	OK
80 °C	-6.6%	8.95 kg / 19.73 lbs 8947.7 g / 87.8 N
100 °C	-28.8%	6.82 kg / 15.04 lbs 6821.0 g / 66.9 N

Classic neodymiums lose power above the temperature limit. Watch out for overheating – excessive heat can irreversibly damage this magnet. As the temperature rises, the magnet's force briefly lowers. Refrain from using this product close to ovens higher than its working range. Ignoring the limit will result in permanent loss of magnetism.

*Engineering note: Heat tolerance is determined by both grade, but also on the magnet's shape. Flat magnets (low Pc) are more susceptible to demagnetization under lower heat stress compared to rod magnets. The danger warning in the table points to permanent field degradation for this particular item.

Table 6: Two magnets (repulsion) - field range
MW 20x35 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Sliding Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	68.69 kg / 151.44 lbs 6 132 Gs	10.30 kg / 22.72 lbs 10304 g / 101.1 N	N/A
1 mm	62.01 kg / 136.70 lbs 11 316 Gs	9.30 kg / 20.50 lbs 9301 g / 91.2 N	55.81 kg / 123.03 lbs ~0 Gs
2 mm	55.58 kg / 122.53 lbs 10 714 Gs	8.34 kg / 18.38 lbs 8337 g / 81.8 N	50.02 kg / 110.28 lbs ~0 Gs
3 mm	49.59 kg / 109.32 lbs 10 120 Gs	7.44 kg / 16.40 lbs 7438 g / 73.0 N	44.63 kg / 98.39 lbs ~0 Gs
5 mm	38.99 kg / 85.96 lbs 8 974 Gs	5.85 kg / 12.89 lbs 5849 g / 57.4 N	35.09 kg / 77.37 lbs ~0 Gs
10 mm	20.36 kg / 44.88 lbs 6 484 Gs	3.05 kg / 6.73 lbs 3054 g / 30.0 N	18.32 kg / 40.40 lbs ~0 Gs
20 mm	5.39 kg / 11.88 lbs 3 337 Gs	0.81 kg / 1.78 lbs 809 g / 7.9 N	4.85 kg / 10.70 lbs ~0 Gs
50 mm	0.25 kg / 0.55 lbs 718 Gs	0.04 kg / 0.08 lbs 37 g / 0.4 N	0.22 kg / 0.50 lbs ~0 Gs
60 mm	0.12 kg / 0.26 lbs 492 Gs	0.02 kg / 0.04 lbs 18 g / 0.2 N	0.11 kg / 0.23 lbs ~0 Gs
70 mm	0.06 kg / 0.13 lbs 352 Gs	0.01 kg / 0.02 lbs 9 g / 0.1 N	0.05 kg / 0.12 lbs ~0 Gs
80 mm	0.03 kg / 0.07 lbs 261 Gs	0.00 kg / 0.01 lbs 5 g / 0.0 N	0.03 kg / 0.07 lbs ~0 Gs
90 mm	0.02 kg / 0.04 lbs 200 Gs	0.00 kg / 0.01 lbs 3 g / 0.0 N	0.02 kg / 0.04 lbs ~0 Gs
100 mm	0.01 kg / 0.03 lbs 156 Gs	0.00 kg / 0.00 lbs 2 g / 0.0 N	0.01 kg / 0.02 lbs ~0 Gs

Two magnets attract each other from a much further distance than a magnet and steel setup. The connection of magnet-to-magnet produces a massive flux and a larger range of performance. Want to build a powerful holder? Apply two magnets instead of one magnet and a striker plate. Remember that when connecting a pair of magnets, the collision energy is massive. The levitation is slightly lower than the attraction, but still impressive.
*Flux density between like poles drops to ~0 Gs at the midpoint between the magnets (caused by magnetic field nullification).
* Figures refer to friction force of dual identical magnets (friction ~0.15 for Ni-Ni coating).

Table 7: Protective zones (implants) - precautionary measures
MW 20x35 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	15.0 cm
Hearing aid	10 Gs (1.0 mT)	11.5 cm
Mechanical watch	20 Gs (2.0 mT)	9.0 cm
Phone / Smartphone	40 Gs (4.0 mT)	7.0 cm
Car key	50 Gs (5.0 mT)	6.5 cm
Payment card	400 Gs (40.0 mT)	2.5 cm
HDD hard drive	600 Gs (60.0 mT)	2.0 cm

Powerful magnet radiation poses a serious hazard to electronic devices as well as medical implants. These neodymiums produce a field that prevents correct functioning of digital equipment. Notice: the invisible magnetic field passes through tissues and housings. Exceptional care must be taken by people with hearing aids and insulin pumps. The risk also applies to: mechanical watches, car keys, speakers, and screens. Do not bring the product near payment cards, hard drives, or sensitive navigation tools.

Table 8: Collisions (cracking risk) - collision effects
MW 20x35 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	11.39 km/h (3.16 m/s)	0.41 J
30 mm	18.85 km/h (5.24 m/s)	1.13 J
50 mm	24.31 km/h (6.75 m/s)	1.88 J
100 mm	34.37 km/h (9.55 m/s)	3.76 J

Magnetic elements are delicate – a violent impact against metal causes immediate chipping. Pay attention to connection velocity – a neodymium left loose speeds with massive force. Kinetic force can trigger coating fragments or dangerous crushing to fingers. Be sure to control the product during mounting so it doesn't hit with great force against the metal. A collision at high speed means shattering of the magnet. Use safety goggles when working with powerful specimens.

Table 9: Anti-corrosion coating durability
MW 20x35 / 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)

Neodymium magnets are highly susceptible to corrosion without proper protection. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Electrical data (P_c)
MW 20x35 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	20 408 Mx	204.1 µWb
P_c Coefficient	1.16	High (Stable)

Flux value emitted by the magnet pole. Key data when building generators as well as sensors. P_c value defines the magnet's operating point.

Table 11: Physics of underwater searching
MW 20x35 / N38

Environment	Effective steel pull	Effect
Air (land)	9.58 kg	Standard
Water (riverbed)	10.97 kg (+1.39 kg buoyancy gain)	+14.5%

Rust risk: 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. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

1. Sliding resistance

*Note: On a vertical wall, the magnet retains only ~20% of its max power.

2. Plate thickness effect

*Thin steel (e.g. computer case) significantly limits the holding force.

3. Heat tolerance

*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) = 1.16

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 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: 010043-2026

Magnet Unit Converter

Pulling force

Force in kg

Newtons (N)

lbs

Field Strength

Gauss (Gs)

Input a figure in just one slot to get results in the other fields right away.

View also offers

Product available Ships tomorrow

MPL 40x10x4 / N38 - lamellar magnet

4.87 ZŁ brutto / pcs

Product available Ships tomorrow

MW 6x3 / N38 - cylindrical magnet

0.381 ZŁ brutto / pcs

Product available Ships tomorrow

UMGW 25x17x8 [M5] GW / N38 - magnetic holder internal thread

11.91 ZŁ brutto / pcs

Product available Ships tomorrow

MPL 40x20x5 / N38 - lamellar magnet

12.24 ZŁ brutto / pcs

This product is an extremely powerful cylinder magnet, composed of modern NdFeB material, which, at dimensions of Ø20x35 mm, guarantees the highest energy density. This specific item is characterized by 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. 9.58 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring lightning-fast order fulfillment. Furthermore, its Ni-Cu-Ni coating shields it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.

It successfully proves itself in modeling, advanced automation, and broadly understood industry, serving as a fastening or actuating element. Thanks to the high power of 93.97 N with a weight of only 82.47 g, this rod is indispensable in electronics and wherever low weight is crucial.

Since our magnets have a tolerance of ±0.1mm, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 20.1 mm) using two-component epoxy glues. To ensure stability in automation, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.

Grade N38 is the most frequently chosen standard for professional neodymium magnets, offering a great economic balance and high resistance to demagnetization. If you need even stronger magnets in the same volume (Ø20x35), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our store.

The presented product is a neodymium magnet with precisely defined parameters: diameter 20 mm and height 35 mm. The key parameter here is the holding force amounting to approximately 9.58 kg (force ~93.97 N), which, with such compact dimensions, proves the high grade of the NdFeB material. 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 35 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 rare earth magnets.

Pros

In addition to their long-term stability, neodymium magnets provide the following advantages:

They have unchanged lifting capacity, and over around ten years their performance decreases symbolically – ~1% (in testing),
Magnets perfectly resist against demagnetization caused by ambient magnetic noise,
A magnet with a shiny nickel surface has better aesthetics,
The surface of neodymium magnets generates a maximum magnetic field – this is a key feature,
Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
Possibility of custom shaping as well as adjusting to atypical needs,
Fundamental importance in modern technologies – they are utilized in hard drives, electric drive systems, medical equipment, and multitasking production systems.
Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which makes them useful in compact constructions

Weaknesses

Disadvantages of neodymium magnets:

They are prone to damage upon too strong impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only protects the magnet but also improves its resistance to damage
Neodymium magnets decrease their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. 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 recommend using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
We suggest casing - magnetic holder, due to difficulties in creating nuts inside the magnet and complex shapes.
Possible danger resulting from small fragments of magnets pose a threat, when accidentally swallowed, which gains importance in the context of child safety. Furthermore, small elements of these devices are able to disrupt the diagnostic process medical in case of swallowing.
High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which can limit application in large quantities

Lifting parameters

Maximum holding power of the magnet – what it depends on?

The declared magnet strength represents the limit force, obtained under laboratory conditions, specifically:

using a plate made of low-carbon steel, serving as a ideal flux conductor
whose thickness equals approx. 10 mm
with an polished contact surface
with zero gap (without paint)
under perpendicular application of breakaway force (90-degree angle)
in temp. approx. 20°C

Determinants of lifting force in real conditions

In practice, the actual holding force results from a number of factors, ranked from most significant:

Space between surfaces – every millimeter of distance (caused e.g. by veneer or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
Angle of force application – highest force is reached only during pulling at a 90° angle. The force required to slide of the magnet along the plate is standardly several times smaller (approx. 1/5 of the lifting capacity).
Element thickness – for full efficiency, the steel must be adequately massive. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
Metal type – not every steel reacts the same. High carbon content weaken the attraction effect.
Surface condition – smooth surfaces guarantee perfect abutment, which improves field saturation. Rough surfaces weaken the grip.
Temperature influence – hot environment reduces pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity was assessed using a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, whereas under parallel forces the holding force is lower. Moreover, even a minimal clearance between the magnet and the plate lowers the load capacity.

Safety rules for work with NdFeB magnets

Machining danger

Dust generated during grinding of magnets is combustible. Avoid drilling into magnets unless you are an expert.

Heat warning

Monitor thermal conditions. Exposing the magnet above 80 degrees Celsius will destroy its magnetic structure and pulling force.

Powerful field

Use magnets consciously. Their immense force can shock even experienced users. Be vigilant and respect their force.

Nickel allergy

A percentage of the population experience a hypersensitivity to Ni, which is the standard coating for NdFeB magnets. Extended handling might lead to skin redness. We suggest wear protective gloves.

Life threat

For implant holders: Powerful magnets disrupt electronics. Maintain minimum 30 cm distance or ask another person to work with the magnets.

Bodily injuries

Big blocks can break fingers instantly. Under no circumstances place your hand betwixt two strong magnets.

Electronic devices

Intense magnetic fields can erase data on credit cards, hard drives, and storage devices. Keep a distance of at least 10 cm.

Eye protection

Protect your eyes. Magnets can explode upon uncontrolled impact, launching shards into the air. We recommend safety glasses.

Keep away from electronics

An intense magnetic field negatively affects the operation of magnetometers in smartphones and navigation systems. Do not bring magnets close to a device to prevent damaging the sensors.

This is not a toy

Always keep magnets out of reach of children. Choking hazard is high, and the consequences of magnets connecting inside the body are tragic.

Warning! Learn more about risks in the article: Safety of working with magnets.

MW 20x35 / N38 - cylindrical magnet

Detailed specification - MW 20x35 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering modeling of the product - technical parameters

Table 1: Static force (force vs distance) - power drop MW 20x35 / N38

Table 2: Vertical force (vertical surface) MW 20x35 / N38

Table 3: Vertical assembly (shearing) - vertical pull MW 20x35 / N38

Table 4: Steel thickness (substrate influence) - power losses MW 20x35 / N38

Table 5: Thermal resistance (stability) - power drop MW 20x35 / N38

Table 6: Two magnets (repulsion) - field range MW 20x35 / N38

Table 7: Protective zones (implants) - precautionary measures MW 20x35 / N38

Table 8: Collisions (cracking risk) - collision effects MW 20x35 / N38

Table 9: Anti-corrosion coating durability MW 20x35 / N38

Table 10: Electrical data (Pc) MW 20x35 / N38

Table 11: Physics of underwater searching MW 20x35 / N38

1. Sliding resistance

2. Plate thickness effect

3. Heat tolerance

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

Material specification

Environmental data

Pulling force

Field Strength

View also offers

MPL 40x10x4 / N38 - lamellar magnet

MW 6x3 / N38 - cylindrical magnet

UMGW 25x17x8 [M5] GW / N38 - magnetic holder internal thread

MPL 40x20x5 / N38 - lamellar magnet

Advantages as well as disadvantages of rare earth magnets.

Pros

Weaknesses

Lifting parameters

Maximum holding power of the magnet – what it depends on?

Determinants of lifting force in real conditions

Safety rules for work with NdFeB magnets

Machining danger

Heat warning

Powerful field

Nickel allergy

Life threat

Bodily injuries

Electronic devices

Eye protection

Keep away from electronics

This is not a toy

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (force vs distance) - power drop
MW 20x35 / N38

Table 2: Vertical force (vertical surface)
MW 20x35 / N38

Table 3: Vertical assembly (shearing) - vertical pull
MW 20x35 / N38

Table 4: Steel thickness (substrate influence) - power losses
MW 20x35 / N38

Table 5: Thermal resistance (stability) - power drop
MW 20x35 / N38

Table 6: Two magnets (repulsion) - field range
MW 20x35 / N38

Table 7: Protective zones (implants) - precautionary measures
MW 20x35 / N38

Table 8: Collisions (cracking risk) - collision effects
MW 20x35 / N38

Table 9: Anti-corrosion coating durability
MW 20x35 / N38

Table 10: Electrical data (P_c)
MW 20x35 / N38

Table 11: Physics of underwater searching
MW 20x35 / N38