Product available Ships tomorrow

MP 30x7/3x3 / 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 030250

GTIN/EAN: 5906301812265

5.00

Diameter

30 mm [±0,1 mm]

internal diameter Ø

7/3 mm [±0,1 mm]

Height

3 mm [±0,1 mm]

Weight

15.75 g

Magnetization Direction

↑ axial

Load capacity

3.64 kg / 35.69 N

Magnetic Induction

121.58 mT / 1216 Gs

Coating

[NiCuNi] Nickel

see properties »

6.84 ZŁ with VAT / pcs + price for transport

5.56 ZŁ net + 23% VAT / pcs

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Call us +48 888 99 98 98 alternatively send us a note using request form the contact page.
Lifting power as well as shape of magnets can be tested with our force calculator.

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

Technical of the product - MP 30x7/3x3 / N38 - ring magnet

Specification / characteristics - MP 30x7/3x3 / N38 - ring magnet

properties

properties	values
Cat. no.	030250
GTIN/EAN	5906301812265
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	30 mm [±0,1 mm]
internal diameter Ø	7/3 mm [±0,1 mm]
Height	3 mm [±0,1 mm]
Weight	15.75 g
Magnetization Direction	↑ axial
Load capacity ~ ?	3.64 kg / 35.69 N
Magnetic Induction ~ ?	121.58 mT / 1216 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 30x7/3x3 / 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

Physical simulation of the product - technical parameters

These values constitute the direct effect of a engineering analysis. Results rely on algorithms for the material Nd₂Fe₁₄B. Real-world performance might slightly deviate from the simulation results. Treat these data as a supplementary guide for designers.

Table 1: Static force (force vs gap) - power drop
MP 30x7/3x3 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	1039 Gs 103.9 mT	3.64 kg / 8.02 LBS 3640.0 g / 35.7 N	warning
1 mm	1015 Gs 101.5 mT	3.48 kg / 7.67 LBS 3477.6 g / 34.1 N	warning
2 mm	980 Gs 98.0 mT	3.24 kg / 7.14 LBS 3240.7 g / 31.8 N	warning
3 mm	936 Gs 93.6 mT	2.95 kg / 6.51 LBS 2951.6 g / 29.0 N	warning
5 mm	827 Gs 82.7 mT	2.31 kg / 5.08 LBS 2305.8 g / 22.6 N	warning
10 mm	539 Gs 53.9 mT	0.98 kg / 2.16 LBS 981.0 g / 9.6 N	low risk
15 mm	329 Gs 32.9 mT	0.37 kg / 0.80 LBS 365.1 g / 3.6 N	low risk
20 mm	202 Gs 20.2 mT	0.14 kg / 0.30 LBS 137.9 g / 1.4 N	low risk
30 mm	85 Gs 8.5 mT	0.02 kg / 0.05 LBS 24.6 g / 0.2 N	low risk
50 mm	23 Gs 2.3 mT	0.00 kg / 0.00 LBS 1.8 g / 0.0 N	low risk

Magnetic force weakens drastically with every mm of distance. Note that even the smallest gap (e.g., dirt, paint, dust) noticeably diminishes the holding power. Neodymiums operate optimally during direct contact; distance drastically cuts the power. See how rapidly the load capacity fall, when the magnet does not touch flatly to the metal substrate. When planning the arrangement, discard unnecessary gaps.

Table 2: Sliding load (vertical surface)
MP 30x7/3x3 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.73 kg / 1.60 LBS 728.0 g / 7.1 N
1 mm	Stal (~0.2)	0.70 kg / 1.53 LBS 696.0 g / 6.8 N
2 mm	Stal (~0.2)	0.65 kg / 1.43 LBS 648.0 g / 6.4 N
3 mm	Stal (~0.2)	0.59 kg / 1.30 LBS 590.0 g / 5.8 N
5 mm	Stal (~0.2)	0.46 kg / 1.02 LBS 462.0 g / 4.5 N
10 mm	Stal (~0.2)	0.20 kg / 0.43 LBS 196.0 g / 1.9 N
15 mm	Stal (~0.2)	0.07 kg / 0.16 LBS 74.0 g / 0.7 N
20 mm	Stal (~0.2)	0.03 kg / 0.06 LBS 28.0 g / 0.3 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 following data indicates the theoretical shear load needed to initiate the sliding of the magnet vertically against a upright steel plate (considering standard friction). The holding force varies with the separation distance between the magnet and the surface.

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MP 30x7/3x3 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	1.09 kg / 2.41 LBS 1092.0 g / 10.7 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.73 kg / 1.60 LBS 728.0 g / 7.1 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.36 kg / 0.80 LBS 364.0 g / 3.6 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	1.82 kg / 4.01 LBS 1820.0 g / 17.9 N

When mounting a magnet on a upright wall (e.g., a board), it you can count on only about 20%-30% of its nominal power. Gravity and a weak degree of grip cause that magnets move down faster than they pull off. Planning a vertical fastening? Note that the sliding force is noticeably lower than the perpendicular breakaway force. On a smooth steel, the element will slip down under a much lighter weight. Application of an anti-slip pad can effectively raise the stability.

Table 4: Material efficiency (saturation) - sheet metal selection
MP 30x7/3x3 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.36 kg / 0.80 LBS 364.0 g / 3.6 N
1 mm	25%	0.91 kg / 2.01 LBS 910.0 g / 8.9 N
2 mm	50%	1.82 kg / 4.01 LBS 1820.0 g / 17.9 N
3 mm	75%	2.73 kg / 6.02 LBS 2730.0 g / 26.8 N
5 mm	100%	3.64 kg / 8.02 LBS 3640.0 g / 35.7 N
10 mm	100%	3.64 kg / 8.02 LBS 3640.0 g / 35.7 N
11 mm	100%	3.64 kg / 8.02 LBS 3640.0 g / 35.7 N
12 mm	100%	3.64 kg / 8.02 LBS 3640.0 g / 35.7 N

A too thin steel is not enough to take in the entire magnetic field, which weakens actual performance of the holder. Should you install a neodymium to a too thin substrate, the field will penetrate right through and the holding will be smaller. To squeeze full efficiency of this magnet's power, you need a suitably thick element of steel. The saturation phenomenon causes that on delicate walls (e.g., appliance housings), the holder shows lower pull force. We suggest choosing the steel cross-section from these parameters.

Table 5: Working in heat (material behavior) - thermal limit
MP 30x7/3x3 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	3.64 kg / 8.02 LBS 3640.0 g / 35.7 N	OK
40 °C	-2.2%	3.56 kg / 7.85 LBS 3559.9 g / 34.9 N	OK
60 °C	-4.4%	3.48 kg / 7.67 LBS 3479.8 g / 34.1 N
80 °C	-6.6%	3.40 kg / 7.50 LBS 3399.8 g / 33.4 N
100 °C	-28.8%	2.59 kg / 5.71 LBS 2591.7 g / 25.4 N

Classic neodymiums lose strength past the thermal threshold. Protect against heat – excessive heat can permanently destroy this magnet. As the temperature rises, the magnet's power momentarily lowers. Avoid using this magnet close to heaters higher than its safe range. Ignoring the limit will result in irreversible degradation of magnetism.

*Engineering note: Heat tolerance depends not only on the material grade, as well as the dimension ratios. Low-profile magnets (low Pc) are more susceptible to demagnetization at lower temperatures compared to rod magnets. The danger warning in the table indicates permanent field degradation for this specific geometry.

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MP 30x7/3x3 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	3.96 kg / 8.73 LBS 1 995 Gs	0.59 kg / 1.31 LBS 594 g / 5.8 N	N/A
1 mm	3.88 kg / 8.56 LBS 2 058 Gs	0.58 kg / 1.28 LBS 582 g / 5.7 N	3.49 kg / 7.70 LBS ~0 Gs
2 mm	3.78 kg / 8.34 LBS 2 031 Gs	0.57 kg / 1.25 LBS 567 g / 5.6 N	3.40 kg / 7.50 LBS ~0 Gs
3 mm	3.66 kg / 8.07 LBS 1 998 Gs	0.55 kg / 1.21 LBS 549 g / 5.4 N	3.30 kg / 7.26 LBS ~0 Gs
5 mm	3.37 kg / 7.43 LBS 1 918 Gs	0.51 kg / 1.12 LBS 506 g / 5.0 N	3.04 kg / 6.69 LBS ~0 Gs
10 mm	2.51 kg / 5.53 LBS 1 654 Gs	0.38 kg / 0.83 LBS 376 g / 3.7 N	2.26 kg / 4.97 LBS ~0 Gs
20 mm	1.07 kg / 2.35 LBS 1 079 Gs	0.16 kg / 0.35 LBS 160 g / 1.6 N	0.96 kg / 2.12 LBS ~0 Gs
50 mm	0.06 kg / 0.13 LBS 258 Gs	0.01 kg / 0.02 LBS 9 g / 0.1 N	0.05 kg / 0.12 LBS ~0 Gs
60 mm	0.03 kg / 0.06 LBS 171 Gs	0.00 kg / 0.01 LBS 4 g / 0.0 N	0.02 kg / 0.05 LBS ~0 Gs
70 mm	0.01 kg / 0.03 LBS 118 Gs	0.00 kg / 0.00 LBS 2 g / 0.0 N	0.01 kg / 0.03 LBS ~0 Gs
80 mm	0.01 kg / 0.01 LBS 84 Gs	0.00 kg / 0.00 LBS 1 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
90 mm	0.00 kg / 0.01 LBS 62 Gs	0.00 kg / 0.00 LBS 1 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
100 mm	0.00 kg / 0.00 LBS 47 Gs	0.00 kg / 0.00 LBS 0 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs

Two magnets interact from a much further distance than a neodymium and metal combination. The connection of magnet-to-magnet produces a massive flux and a further horizon of operation. Want to build a powerful holder? Utilize two neodymiums instead of one magnet and a steel. Be careful that when attracting two neodymiums, the collision energy is extreme. The levitation is a bit weaker than the connection force, but still large.
*Flux density for N-N configuration is approximately ~0 Gs at the midpoint of the gap (due to field cancellation).
* Calculations demonstrate friction force of two same magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Hazards (implants) - warnings
MP 30x7/3x3 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	9.0 cm
Hearing aid	10 Gs (1.0 mT)	7.0 cm
Timepiece	20 Gs (2.0 mT)	5.5 cm
Mobile device	40 Gs (4.0 mT)	4.5 cm
Remote	50 Gs (5.0 mT)	4.0 cm
Payment card	400 Gs (40.0 mT)	1.5 cm
HDD hard drive	600 Gs (60.0 mT)	1.0 cm

A strong magnetic field poses a large risk to electronic devices as well as pacemakers. These neodymiums generate a flux that prevents correct functioning of digital equipment. Be aware: the invisible magnetic field penetrates the body and housings. Increased vigilance must be taken by people with hearing aids and drug dispensers. Influence will be felt by: automatic timepieces, car keys, membranes, and displays. Avoid contact with magnetic cards, HDD media, or precise measuring instruments.

Table 8: Dynamics (cracking risk) - collision effects
MP 30x7/3x3 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	17.73 km/h (4.92 m/s)	0.19 J
30 mm	26.67 km/h (7.41 m/s)	0.43 J
50 mm	34.29 km/h (9.53 m/s)	0.71 J
100 mm	48.48 km/h (13.47 m/s)	1.43 J

Neodymium magnets are delicate – a strong collision with metal causes immediate chipping. Pay attention to connection velocity – a magnet released freely becomes dangerous. Striking energy can trigger coating fragments or dangerous crushing to fingers. Hold the magnet firmly during installation so it doesn't hit violently against the steel surface. A contact at a velocity of dozens of km/h almost guarantees destruction of the neodymium. Use safety goggles when working with powerful specimens.

Table 9: Surface protection spec
MP 30x7/3x3 / 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. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Electrical data (Flux)
MP 30x7/3x3 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	8 395 Mx	84.0 µWb
P_c Coefficient	0.13	Low (Flat)

Total magnetic flux 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: Underwater work (magnet fishing)
MP 30x7/3x3 / N38

Environment	Effective steel pull	Effect
Air (land)	3.64 kg	Standard
Water (riverbed)	4.17 kg (+0.53 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.

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. Sliding resistance

*Caution: On a vertical surface, the magnet retains just ~20% of its nominal pull.

2. Steel saturation

*Thin steel (e.g. 0.5mm PC case) significantly reduces the holding force.

3. Thermal stability

*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) = 0.13

This simulation demonstrates the magnetic stability of the selected magnet under specific geometric conditions. The solid red line represents the demagnetization curve (material potential), while the dashed blue line is the load line based on the magnet's geometry. The 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

Chemical composition

iron (Fe)	64% – 68%
neodymium (Nd)	29% – 32%
boron (B)	1.1% – 1.2%
dysprosium (Dy)	0.5% – 2.0%
coating (Ni-Cu-Ni)	< 0.05%

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: 030250-2026

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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 quick installation to wood, wall, plastic, or metal. This product with a force of 3.64 kg works great as a door latch, speaker holder, or spacer element in devices.

This is a crucial issue when working with model MP 30x7/3x3 / 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. It's a good idea to use a rubber spacer under the screw head, which will cushion the stresses. Remember: cracking during assembly results from material properties, not a product defect.

These magnets are coated with standard Ni-Cu-Ni plating, which protects them in indoor conditions, but does not ensure full waterproofing. Damage to the protective layer during assembly is the most common cause of rusting. This product is dedicated for indoor use. For outdoor applications, we recommend choosing magnets in hermetic housing or additional protection with varnish.

The inner hole diameter determines the maximum size of the mounting element. 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.

This model is characterized by dimensions Ø30x3 mm and a weight of 15.75 g. The key parameter here is the holding force amounting to approximately 3.64 kg (force ~35.69 N). The mounting hole diameter is precisely 7/3 mm.

These magnets are magnetized axially (through the thickness), which means one flat side is the N pole and the other is S. If you want two such magnets screwed with cones facing each other (faces) to attract, you must connect them with opposite poles (N to S). When ordering a larger quantity, magnets are usually packed in stacks, where they are already naturally paired.

Advantages and disadvantages of rare earth magnets.

Benefits

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

They do not lose power, even after approximately ten years – the decrease in power is only ~1% (according to tests),
Magnets very well protect themselves against loss of magnetization caused by external fields,
A magnet with a shiny gold surface is more attractive,
Magnetic induction on the surface of the magnet remains very high,
Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
Possibility of custom shaping and adapting to individual requirements,
Fundamental importance in modern industrial fields – they are commonly used in mass storage devices, motor assemblies, medical devices, and modern systems.
Thanks to their power density, small magnets offer high operating force, with minimal size,

Weaknesses

Disadvantages of NdFeB magnets:

To avoid cracks under impact, we suggest using special steel housings. Such a solution protects the magnet and simultaneously increases its durability.
When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation as well as corrosion.
We recommend casing - magnetic mechanism, due to difficulties in creating nuts inside the magnet and complex shapes.
Potential hazard to health – tiny shards of magnets are risky, if swallowed, which becomes key in the context of child safety. Furthermore, small elements of these magnets can complicate diagnosis medical after entering the body.
High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which can limit application in large quantities

Holding force characteristics

Highest magnetic holding force – what affects it?

The force parameter is a result of laboratory testing executed under specific, ideal conditions:

on a plate made of mild steel, effectively closing the magnetic field
with a thickness minimum 10 mm
with an ideally smooth contact surface
without any insulating layer between the magnet and steel
under perpendicular force direction (90-degree angle)
at ambient temperature room level

Determinants of practical lifting force of a magnet

During everyday use, the real power is determined by many variables, listed from crucial:

Distance – the presence of foreign body (rust, tape, air) acts as an insulator, which reduces power steeply (even by 50% at 0.5 mm).
Loading method – catalog parameter refers to pulling vertically. When slipping, the magnet holds significantly lower power (often approx. 20-30% of nominal force).
Base massiveness – insufficiently thick sheet causes magnetic saturation, causing part of the flux to be escaped into the air.
Chemical composition of the base – low-carbon steel attracts best. Higher carbon content decrease magnetic properties and lifting capacity.
Surface quality – the more even the plate, the better the adhesion and stronger the hold. Unevenness acts like micro-gaps.
Thermal conditions – neodymium magnets have a negative temperature coefficient. When it is hot they are weaker, and in frost gain strength (up to a certain limit).

Lifting capacity was determined by applying a smooth steel plate of optimal thickness (min. 20 mm), under vertically applied force, whereas under shearing force the holding force is lower. Moreover, even a slight gap between the magnet’s surface and the plate lowers the load capacity.

H&S for magnets

Life threat

Warning for patients: Strong magnetic fields disrupt electronics. Keep at least 30 cm distance or ask another person to work with the magnets.

Compass and GPS

GPS units and mobile phones are highly susceptible to magnetic fields. Close proximity with a powerful NdFeB magnet can ruin the internal compass in your phone.

Thermal limits

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

Skin irritation risks

Nickel alert: The Ni-Cu-Ni coating contains nickel. If redness occurs, immediately stop working with magnets and use protective gear.

Choking Hazard

NdFeB magnets are not intended for children. Eating several magnets may result in them pinching intestinal walls, which constitutes a critical condition and necessitates urgent medical intervention.

Magnet fragility

Despite the nickel coating, neodymium is delicate and cannot withstand shocks. Avoid impacts, as the magnet may crumble into hazardous fragments.

Do not drill into magnets

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

Finger safety

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

Cards and drives

Do not bring magnets close to a wallet, computer, or screen. The magnetic field can destroy these devices and erase data from cards.

Handling guide

Before starting, check safety instructions. Sudden snapping can break the magnet or injure your hand. Be predictive.

Important! More info about hazards in the article: Safety of working with magnets.

MP 30x7/3x3 / N38 - ring magnet

Technical of the product - MP 30x7/3x3 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical simulation of the product - technical parameters

Table 1: Static force (force vs gap) - power drop MP 30x7/3x3 / N38

Table 2: Sliding load (vertical surface) MP 30x7/3x3 / N38

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces MP 30x7/3x3 / N38

Table 4: Material efficiency (saturation) - sheet metal selection MP 30x7/3x3 / N38

Table 5: Working in heat (material behavior) - thermal limit MP 30x7/3x3 / N38

Table 6: Magnet-Magnet interaction (attraction) - forces in the system MP 30x7/3x3 / N38

Table 7: Hazards (implants) - warnings MP 30x7/3x3 / N38

Table 8: Dynamics (cracking risk) - collision effects MP 30x7/3x3 / N38

Table 9: Surface protection spec MP 30x7/3x3 / N38

Table 10: Electrical data (Flux) MP 30x7/3x3 / N38

Table 11: Underwater work (magnet fishing) MP 30x7/3x3 / N38

1. Sliding resistance

2. Steel saturation

3. Thermal stability

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

Chemical composition

Sustainability

Magnet pull force

Magnetic Induction

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Advantages and disadvantages of rare earth magnets.

Benefits

Weaknesses

Holding force characteristics

Highest magnetic holding force – what affects it?

Determinants of practical lifting force of a magnet

H&S for magnets

Life threat

Compass and GPS

Thermal limits

Skin irritation risks

Choking Hazard

Magnet fragility

Do not drill into magnets

Finger safety

Cards and drives

Handling guide

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (force vs gap) - power drop
MP 30x7/3x3 / N38

Table 2: Sliding load (vertical surface)
MP 30x7/3x3 / N38

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MP 30x7/3x3 / N38

Table 4: Material efficiency (saturation) - sheet metal selection
MP 30x7/3x3 / N38

Table 5: Working in heat (material behavior) - thermal limit
MP 30x7/3x3 / N38

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MP 30x7/3x3 / N38

Table 7: Hazards (implants) - warnings
MP 30x7/3x3 / N38

Table 8: Dynamics (cracking risk) - collision effects
MP 30x7/3x3 / N38

Table 9: Surface protection spec
MP 30x7/3x3 / N38

Table 10: Electrical data (Flux)
MP 30x7/3x3 / N38

Table 11: Underwater work (magnet fishing)
MP 30x7/3x3 / N38