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MP 40x22x10 / N38 - ring 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

ring magnet

Catalog no 030344

GTIN/EAN: 5906301812296

5.00

Diameter

40 mm [±0,1 mm]

internal diameter Ø

22 mm [±0,1 mm]

Height

10 mm [±0,1 mm]

Weight

65.74 g

Magnetization Direction

↑ axial

Load capacity

19.34 kg / 189.71 N

Magnetic Induction

277.22 mT / 2772 Gs

Coating

[NiCuNi] Nickel

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40.59 ZŁ with VAT / pcs + price for transport

33.00 ZŁ net + 23% VAT / pcs

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Technical details - MP 40x22x10 / N38 - ring magnet

Specification / characteristics - MP 40x22x10 / N38 - ring magnet

properties

properties	values
Cat. no.	030344
GTIN/EAN	5906301812296
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	40 mm [±0,1 mm]
internal diameter Ø	22 mm [±0,1 mm]
Height	10 mm [±0,1 mm]
Weight	65.74 g
Magnetization Direction	↑ axial
Load capacity ~ ?	19.34 kg / 189.71 N
Magnetic Induction ~ ?	277.22 mT / 2772 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 40x22x10 / N38 - ring 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

Technical simulation of the product - technical parameters

The following values are the direct effect of a mathematical calculation. Values rely on models for the material Nd₂Fe₁₄B. Operational conditions might slightly differ. Treat these data as a reference point during assembly planning.

Table 1: Static force (force vs gap) - interaction chart
MP 40x22x10 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5269 Gs 526.9 mT	19.34 kg / 42.64 lbs 19340.0 g / 189.7 N	dangerous!
1 mm	5005 Gs 500.5 mT	17.46 kg / 38.48 lbs 17455.9 g / 171.2 N	dangerous!
2 mm	4739 Gs 473.9 mT	15.65 kg / 34.50 lbs 15647.5 g / 153.5 N	dangerous!
3 mm	4475 Gs 447.5 mT	13.95 kg / 30.75 lbs 13950.0 g / 136.8 N	dangerous!
5 mm	3960 Gs 396.0 mT	10.93 kg / 24.09 lbs 10927.7 g / 107.2 N	dangerous!
10 mm	2832 Gs 283.2 mT	5.59 kg / 12.32 lbs 5589.2 g / 54.8 N	medium risk
15 mm	1990 Gs 199.0 mT	2.76 kg / 6.09 lbs 2760.5 g / 27.1 N	medium risk
20 mm	1407 Gs 140.7 mT	1.38 kg / 3.04 lbs 1379.2 g / 13.5 N	safe
30 mm	745 Gs 74.5 mT	0.39 kg / 0.85 lbs 386.2 g / 3.8 N	safe
50 mm	268 Gs 26.8 mT	0.05 kg / 0.11 lbs 50.1 g / 0.5 N	safe

Grip strength decreases drastically per each millimeter of distance. Note that every additional insulation layer (e.g., dirt, varnish, veneer) strongly weakens the grip. Magnetic products operate strongest in perfect adhesion; air break weakens the power. Observe how rapidly the load capacity plummet, when the product does not touch tightly to the metal substrate. When calculating the mounting, eliminate unnecessary gaps.

Table 2: Vertical load (wall)
MP 40x22x10 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	3.87 kg / 8.53 lbs 3868.0 g / 37.9 N
1 mm	Stal (~0.2)	3.49 kg / 7.70 lbs 3492.0 g / 34.3 N
2 mm	Stal (~0.2)	3.13 kg / 6.90 lbs 3130.0 g / 30.7 N
3 mm	Stal (~0.2)	2.79 kg / 6.15 lbs 2790.0 g / 27.4 N
5 mm	Stal (~0.2)	2.19 kg / 4.82 lbs 2186.0 g / 21.4 N
10 mm	Stal (~0.2)	1.12 kg / 2.46 lbs 1118.0 g / 11.0 N
15 mm	Stal (~0.2)	0.55 kg / 1.22 lbs 552.0 g / 5.4 N
20 mm	Stal (~0.2)	0.28 kg / 0.61 lbs 276.0 g / 2.7 N
30 mm	Stal (~0.2)	0.08 kg / 0.17 lbs 78.0 g / 0.8 N
50 mm	Stal (~0.2)	0.01 kg / 0.02 lbs 10.0 g / 0.1 N

The table below indicates the theoretical shear load necessary to initiate the downward movement of the magnet downwards against a upright metal surface (assuming standard friction coefficient). The holding force is a function of the separation distance between the magnet and the metal.

Table 3: Vertical assembly (sliding) - vertical pull
MP 40x22x10 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	5.80 kg / 12.79 lbs 5802.0 g / 56.9 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	3.87 kg / 8.53 lbs 3868.0 g / 37.9 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	1.93 kg / 4.26 lbs 1934.0 g / 19.0 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	9.67 kg / 21.32 lbs 9670.0 g / 94.9 N

When placing a element on a vertical surface (e.g., a car body), it you can count on only about 1/5 of its maximum pull force. Gravity as well as a weak degree of grip cause that holders move down easier than they pull off. Want to create a wall mount? Consider that the shear force is noticeably lower than the perpendicular breakaway force. On a smooth steel, the holder will give way down under a significantly smaller weight. Utilizing a rubberized coating can effectively improve the result.

Table 4: Material efficiency (saturation) - sheet metal selection
MP 40x22x10 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	5%	0.97 kg / 2.13 lbs 967.0 g / 9.5 N
1 mm	13%	2.42 kg / 5.33 lbs 2417.5 g / 23.7 N
2 mm	25%	4.84 kg / 10.66 lbs 4835.0 g / 47.4 N
3 mm	38%	7.25 kg / 15.99 lbs 7252.5 g / 71.1 N
5 mm	63%	12.09 kg / 26.65 lbs 12087.5 g / 118.6 N
10 mm	100%	19.34 kg / 42.64 lbs 19340.0 g / 189.7 N
11 mm	100%	19.34 kg / 42.64 lbs 19340.0 g / 189.7 N
12 mm	100%	19.34 kg / 42.64 lbs 19340.0 g / 189.7 N

A thin metal plate is incapable of take in the entire magnetic field, which squanders power of the holder. If you install a neodymium to a weak sheet, the magnetism will penetrate right through and the attraction force will be weaker. To achieve the maximum of this magnet's potential, you require a sufficiently solid backing of steel. The saturation effect means that on sheet metal structures (e.g., thin profiles), the holder shows lower pull force. We recommend selecting the steel thickness based on the following data.

Table 5: Thermal stability (stability) - resistance threshold
MP 40x22x10 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	19.34 kg / 42.64 lbs 19340.0 g / 189.7 N	OK
40 °C	-2.2%	18.91 kg / 41.70 lbs 18914.5 g / 185.6 N	OK
60 °C	-4.4%	18.49 kg / 40.76 lbs 18489.0 g / 181.4 N	OK
80 °C	-6.6%	18.06 kg / 39.82 lbs 18063.6 g / 177.2 N
100 °C	-28.8%	13.77 kg / 30.36 lbs 13770.1 g / 135.1 N

Classic neodymiums lose power past the thermal threshold. Protect against heat – high temperature can permanently damage this magnet. With every degree above norm, the magnet's force momentarily decreases. Refrain from using this product close to ovens higher than its operating temperature limit. Too high temperature will lead to permanent loss of magnetism.

*Technical advisory: Temperature resistance is determined by both grade, and the Permeance Coefficient Pc. Thin magnets (low permeance coefficient) are more susceptible to demagnetization sooner than long magnets. Warning indicator in the table points to a risk of irreversible loss for this particular item.

Table 6: Two magnets (repulsion) - forces in the system
MP 40x22x10 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Strength (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	171.37 kg / 377.80 lbs 5 920 Gs	25.71 kg / 56.67 lbs 25705 g / 252.2 N	N/A
1 mm	163.01 kg / 359.38 lbs 10 277 Gs	24.45 kg / 53.91 lbs 24452 g / 239.9 N	146.71 kg / 323.44 lbs ~0 Gs
2 mm	154.67 kg / 341.00 lbs 10 011 Gs	23.20 kg / 51.15 lbs 23201 g / 227.6 N	139.21 kg / 306.90 lbs ~0 Gs
3 mm	146.55 kg / 323.08 lbs 9 744 Gs	21.98 kg / 48.46 lbs 21982 g / 215.6 N	131.89 kg / 290.77 lbs ~0 Gs
5 mm	131.00 kg / 288.81 lbs 9 213 Gs	19.65 kg / 43.32 lbs 19650 g / 192.8 N	117.90 kg / 259.92 lbs ~0 Gs
10 mm	96.83 kg / 213.47 lbs 7 921 Gs	14.52 kg / 32.02 lbs 14524 g / 142.5 N	87.15 kg / 192.12 lbs ~0 Gs
20 mm	49.53 kg / 109.18 lbs 5 665 Gs	7.43 kg / 16.38 lbs 7429 g / 72.9 N	44.57 kg / 98.27 lbs ~0 Gs
50 mm	6.33 kg / 13.95 lbs 2 025 Gs	0.95 kg / 2.09 lbs 949 g / 9.3 N	5.69 kg / 12.55 lbs ~0 Gs
60 mm	3.42 kg / 7.55 lbs 1 489 Gs	0.51 kg / 1.13 lbs 513 g / 5.0 N	3.08 kg / 6.79 lbs ~0 Gs
70 mm	1.94 kg / 4.27 lbs 1 120 Gs	0.29 kg / 0.64 lbs 290 g / 2.8 N	1.74 kg / 3.84 lbs ~0 Gs
80 mm	1.14 kg / 2.52 lbs 860 Gs	0.17 kg / 0.38 lbs 171 g / 1.7 N	1.03 kg / 2.27 lbs ~0 Gs
90 mm	0.70 kg / 1.54 lbs 673 Gs	0.10 kg / 0.23 lbs 105 g / 1.0 N	0.63 kg / 1.39 lbs ~0 Gs
100 mm	0.44 kg / 0.98 lbs 536 Gs	0.07 kg / 0.15 lbs 67 g / 0.7 N	0.40 kg / 0.88 lbs ~0 Gs

Two magnets attract each other from a much further distance than a magnet and steel combination. Such a system of two magnets creates a more powerful interaction and a wider radius of performance. Want to build a solid fastener? Utilize two neodymiums instead of one magnet and a steel. Be careful that when bringing together two magnets, the pinch force is massive. The repulsion force is slightly lower than the connection force, but still impressive.
*Field value in repulsion mode is approximately ~0 Gs at the geometric center of the gap (resulting from vector opposition).
Attention: Figures demonstrate sliding force of dual same neodymium magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Protective zones (implants) - warnings
MP 40x22x10 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	24.0 cm
Hearing aid	10 Gs (1.0 mT)	18.5 cm
Mechanical watch	20 Gs (2.0 mT)	14.5 cm
Phone / Smartphone	40 Gs (4.0 mT)	11.0 cm
Remote	50 Gs (5.0 mT)	10.5 cm
Payment card	400 Gs (40.0 mT)	4.5 cm
HDD hard drive	600 Gs (60.0 mT)	3.5 cm

Powerful magnet radiation poses a real danger to IT equipment and pacemakers. These NdFeB products produce a flux that destroys function of digital equipment. Notice: the invisible magnetic field acts through matter and plastic. Special caution must be exercised by people with hearing aids and drug dispensers. Influence will be felt by: automatic timepieces, remotes, membranes, and displays. Do not bring the product near payment cards, HDD media, or sensitive navigation tools.

Table 8: Impact energy (kinetic energy) - collision effects
MP 40x22x10 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	20.18 km/h (5.61 m/s)	1.03 J
30 mm	30.33 km/h (8.43 m/s)	2.33 J
50 mm	38.74 km/h (10.76 m/s)	3.81 J
100 mm	54.70 km/h (15.20 m/s)	7.59 J

NdFeB products are very brittle – a strong collision with metal can result in shattering. Pay attention to connection velocity – a magnet released freely speeds with massive force. Striking energy can destroy the magnet or painful pinches to fingers. Hold the magnet firmly during mounting so it doesn't slam with momentum against the metal. A contact at a velocity of dozens of km/h ends with a crack of the neodymium. Use safety goggles when playing with large magnets.

Table 9: Surface protection spec
MP 40x22x10 / 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 following table defines the conditions under which this product can be safely used. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Construction data (P_c)
MP 40x22x10 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	54 070 Mx	540.7 µWb
P_c Coefficient	0.81	High (Stable)

Total magnetic flux emitted by the magnet pole. Essential parameter for generator designers and motors. P_c value determines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
MP 40x22x10 / N38

Environment	Effective steel pull	Effect
Air (land)	19.34 kg	Standard
Water (riverbed)	22.14 kg (+2.80 kg buoyancy gain)	+14.5%

Rust risk: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.

Contrary to myths, water does not block the magnetic field. Buoyancy helps in lifting finds.

1. Wall mount (shear)

*Warning: On a vertical surface, the magnet retains merely approx. 20-30% of its nominal pull.

2. Efficiency vs thickness

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

3. Heat tolerance

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

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.81

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.

Engineering data and GPSR

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%

Sustainability

recyclability (EoL)	100%
recycled raw materials	~10% (pre-cons)
carbon footprint	low / zredukowany
waste code (EWC)	16 02 16

Safety card (GPSR)

responsible entity

Dhit sp. z o.o.

ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki

tel: +48 22 499 98 98 | e-mail: bok@dhit.pl

batch number/type

id: 030344-2026

Measurement Calculator

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Force in kg

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It is ideally suited for places where solid attachment of the magnet to the substrate is required without the risk of detachment. Thanks to the hole (often for a screw), this model enables easy screwing to wood, wall, plastic, or metal. It is also often used in advertising for fixing signs and in workshops for organizing tools.

This is a crucial issue when working with model MP 40x22x10 / N38. Neodymium magnets are sintered ceramics, which means they are hard but breakable and inelastic. One turn too many can destroy the magnet, so do it slowly. The flat screw head should evenly press the magnet. Remember: cracking during assembly results from material properties, not a product defect.

Moisture can penetrate micro-cracks in the coating and cause oxidation of the magnet. In the place of the mounting hole, the coating is thinner and easily scratched when tightening the screw, which will become a corrosion focus. If you must use it outside, paint it with anti-corrosion paint after mounting.

A screw or bolt with a thread diameter smaller than 22 mm fits this model. For magnets with a straight hole, a conical head can act like a wedge and burst the magnet. Aesthetic mounting requires selecting the appropriate head size.

The presented product is a ring magnet with dimensions Ø40 mm (outer diameter) and height 10 mm. The pulling force of this model is an impressive 19.34 kg, which translates to 189.71 N in newtons. The product has a [NiCuNi] coating and is made of NdFeB material. Inner hole dimension: 22 mm.

The poles are located on the planes with holes, not on the sides of the ring. In the case of connecting two rings, make sure one is turned the right way. When ordering a larger quantity, magnets are usually packed in stacks, where they are already naturally paired.

Pros and cons of rare earth magnets.

Benefits

Besides their durability, neodymium magnets are valued for these benefits:

Their strength is maintained, and after around ten years it decreases only by ~1% (according to research),
They maintain their magnetic properties even under external field action,
The use of an refined finish of noble metals (nickel, gold, silver) causes the element to look better,
The surface of neodymium magnets generates a strong magnetic field – this is a distinguishing feature,
Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can work (depending on the shape) even at a temperature of 230°C or more...
In view of the potential of flexible forming and adaptation to custom projects, magnetic components can be produced in a wide range of geometric configurations, which makes them more universal,
Universal use in modern industrial fields – they are utilized in data components, electric drive systems, advanced medical instruments, also complex engineering applications.
Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which allows their use in miniature devices

Weaknesses

Cons of neodymium magnets: application proposals

They are fragile upon heavy impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only protects the magnet but also improves its resistance to damage
Neodymium magnets lose strength when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
Due to limitations in creating nuts and complex shapes in magnets, we recommend using casing - magnetic mount.
Health risk resulting from small fragments of magnets can be dangerous, if swallowed, which becomes key in the aspect of protecting the youngest. Additionally, small components of these magnets are able to complicate diagnosis medical when they are in the body.
Due to expensive raw materials, their price is relatively high,

Holding force characteristics

Highest magnetic holding force – what affects it?

The load parameter shown refers to the limit force, measured under ideal test conditions, namely:

with the contact of a yoke made of special test steel, guaranteeing maximum field concentration
possessing a thickness of min. 10 mm to avoid saturation
characterized by smoothness
without the slightest air gap between the magnet and steel
for force acting at a right angle (pull-off, not shear)
at temperature approx. 20 degrees Celsius

Determinants of practical lifting force of a magnet

Please note that the working load will differ influenced by elements below, in order of importance:

Clearance – the presence of any layer (rust, dirt, air) interrupts the magnetic circuit, which lowers capacity rapidly (even by 50% at 0.5 mm).
Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the maximum value.
Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal limits the attraction force (the magnet "punches through" it).
Material composition – different alloys attracts identically. High carbon content weaken the attraction effect.
Plate texture – ground elements ensure maximum contact, which improves field saturation. Rough surfaces reduce efficiency.
Temperature – temperature increase results in weakening of force. It is worth remembering the thermal limit for a given model.

Lifting capacity testing was conducted on a smooth plate of suitable thickness, under perpendicular forces, whereas under parallel forces the holding force is lower. Moreover, even a slight gap between the magnet and the plate lowers the holding force.

Safe handling of NdFeB magnets

Eye protection

Protect your eyes. Magnets can fracture upon violent connection, launching sharp fragments into the air. Wear goggles.

Crushing force

Protect your hands. Two powerful magnets will snap together instantly with a force of massive weight, destroying everything in their path. Exercise extreme caution!

Threat to navigation

A strong magnetic field interferes with the operation of magnetometers in smartphones and navigation systems. Do not bring magnets near a smartphone to avoid breaking the sensors.

Safe distance

Do not bring magnets close to a wallet, laptop, or TV. The magnetism can destroy these devices and wipe information from cards.

Medical implants

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

Avoid contact if allergic

It is widely known that the nickel plating (standard magnet coating) is a strong allergen. For allergy sufferers, prevent direct skin contact or select encased magnets.

Heat sensitivity

Do not overheat. Neodymium magnets are sensitive to temperature. If you require operation above 80°C, inquire about HT versions (H, SH, UH).

Handling rules

Handle with care. Neodymium magnets act from a long distance and connect with huge force, often faster than you can react.

This is not a toy

Only for adults. Small elements can be swallowed, leading to severe trauma. Store out of reach of kids and pets.

Do not drill into magnets

Machining of NdFeB material poses a fire risk. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.

Important! Need more info? Read our article: Are neodymium magnets dangerous?

MP 40x22x10 / N38 - ring magnet

Technical details - MP 40x22x10 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical simulation of the product - technical parameters

Table 1: Static force (force vs gap) - interaction chart MP 40x22x10 / N38

Table 2: Vertical load (wall) MP 40x22x10 / N38

Table 3: Vertical assembly (sliding) - vertical pull MP 40x22x10 / N38

Table 4: Material efficiency (saturation) - sheet metal selection MP 40x22x10 / N38

Table 5: Thermal stability (stability) - resistance threshold MP 40x22x10 / N38

Table 6: Two magnets (repulsion) - forces in the system MP 40x22x10 / N38

Table 7: Protective zones (implants) - warnings MP 40x22x10 / N38

Table 8: Impact energy (kinetic energy) - collision effects MP 40x22x10 / N38

Table 9: Surface protection spec MP 40x22x10 / N38

Table 10: Construction data (Pc) MP 40x22x10 / N38

Table 11: Underwater work (magnet fishing) MP 40x22x10 / N38

1. Wall mount (shear)

2. Efficiency vs thickness

3. Heat tolerance

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

Material specification

Sustainability

Force (pull)

Magnetic Field

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Pros and cons of rare earth magnets.

Benefits

Weaknesses

Holding force characteristics

Highest magnetic holding force – what affects it?

Determinants of practical lifting force of a magnet

Safe handling of NdFeB magnets

Eye protection

Crushing force

Threat to navigation

Safe distance

Medical implants

Avoid contact if allergic

Heat sensitivity

Handling rules

This is not a toy

Do not drill into magnets

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (force vs gap) - interaction chart
MP 40x22x10 / N38

Table 2: Vertical load (wall)
MP 40x22x10 / N38

Table 3: Vertical assembly (sliding) - vertical pull
MP 40x22x10 / N38

Table 4: Material efficiency (saturation) - sheet metal selection
MP 40x22x10 / N38

Table 5: Thermal stability (stability) - resistance threshold
MP 40x22x10 / N38

Table 6: Two magnets (repulsion) - forces in the system
MP 40x22x10 / N38

Table 7: Protective zones (implants) - warnings
MP 40x22x10 / N38

Table 8: Impact energy (kinetic energy) - collision effects
MP 40x22x10 / N38

Table 9: Surface protection spec
MP 40x22x10 / N38

Table 10: Construction data (P_c)
MP 40x22x10 / N38

Table 11: Underwater work (magnet fishing)
MP 40x22x10 / N38