MW 12x10 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010016
GTIN/EAN: 5906301810155
Diameter Ø
12 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
8.48 g
Magnetization Direction
↑ axial
Load capacity
4.83 kg / 47.41 N
Magnetic Induction
531.09 mT / 5311 Gs
Coating
[NiCuNi] Nickel
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Technical details - MW 12x10 / N38 - cylindrical magnet
Specification / characteristics - MW 12x10 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010016 |
| GTIN/EAN | 5906301810155 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 12 mm [±0,1 mm] |
| Height | 10 mm [±0,1 mm] |
| Weight | 8.48 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 4.83 kg / 47.41 N |
| Magnetic Induction ~ ? | 531.09 mT / 5311 Gs |
| Coating | [NiCuNi] Nickel |
| Manufacturing Tolerance | ±0.1 mm |
Magnetic properties of material N38
| 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 analysis of the product - data
These information constitute the result of a engineering analysis. Results were calculated on algorithms for the class Nd2Fe14B. Operational conditions may differ. Use these calculations as a preliminary roadmap for designers.
Table 1: Static pull force (pull vs distance) - characteristics
MW 12x10 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
5308 Gs
530.8 mT
|
4.83 kg / 10.65 lbs
4830.0 g / 47.4 N
|
strong |
| 1 mm |
4424 Gs
442.4 mT
|
3.36 kg / 7.40 lbs
3355.3 g / 32.9 N
|
strong |
| 2 mm |
3585 Gs
358.5 mT
|
2.20 kg / 4.86 lbs
2203.4 g / 21.6 N
|
strong |
| 3 mm |
2857 Gs
285.7 mT
|
1.40 kg / 3.08 lbs
1399.2 g / 13.7 N
|
weak grip |
| 5 mm |
1787 Gs
178.7 mT
|
0.55 kg / 1.21 lbs
547.8 g / 5.4 N
|
weak grip |
| 10 mm |
622 Gs
62.2 mT
|
0.07 kg / 0.15 lbs
66.3 g / 0.7 N
|
weak grip |
| 15 mm |
272 Gs
27.2 mT
|
0.01 kg / 0.03 lbs
12.7 g / 0.1 N
|
weak grip |
| 20 mm |
141 Gs
14.1 mT
|
0.00 kg / 0.01 lbs
3.4 g / 0.0 N
|
weak grip |
| 30 mm |
52 Gs
5.2 mT
|
0.00 kg / 0.00 lbs
0.5 g / 0.0 N
|
weak grip |
| 50 mm |
13 Gs
1.3 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
weak grip |
Table 2: Shear load (vertical surface)
MW 12x10 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.97 kg / 2.13 lbs
966.0 g / 9.5 N
|
| 1 mm | Stal (~0.2) |
0.67 kg / 1.48 lbs
672.0 g / 6.6 N
|
| 2 mm | Stal (~0.2) |
0.44 kg / 0.97 lbs
440.0 g / 4.3 N
|
| 3 mm | Stal (~0.2) |
0.28 kg / 0.62 lbs
280.0 g / 2.7 N
|
| 5 mm | Stal (~0.2) |
0.11 kg / 0.24 lbs
110.0 g / 1.1 N
|
| 10 mm | Stal (~0.2) |
0.01 kg / 0.03 lbs
14.0 g / 0.1 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
2.0 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
|
Table 3: Vertical assembly (shearing) - vertical pull
MW 12x10 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
1.45 kg / 3.19 lbs
1449.0 g / 14.2 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.97 kg / 2.13 lbs
966.0 g / 9.5 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.48 kg / 1.06 lbs
483.0 g / 4.7 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
2.42 kg / 5.32 lbs
2415.0 g / 23.7 N
|
Table 4: Material efficiency (saturation) - power losses
MW 12x10 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.48 kg / 1.06 lbs
483.0 g / 4.7 N
|
| 1 mm |
|
1.21 kg / 2.66 lbs
1207.5 g / 11.8 N
|
| 2 mm |
|
2.42 kg / 5.32 lbs
2415.0 g / 23.7 N
|
| 3 mm |
|
3.62 kg / 7.99 lbs
3622.5 g / 35.5 N
|
| 5 mm |
|
4.83 kg / 10.65 lbs
4830.0 g / 47.4 N
|
| 10 mm |
|
4.83 kg / 10.65 lbs
4830.0 g / 47.4 N
|
| 11 mm |
|
4.83 kg / 10.65 lbs
4830.0 g / 47.4 N
|
| 12 mm |
|
4.83 kg / 10.65 lbs
4830.0 g / 47.4 N
|
Table 5: Thermal resistance (material behavior) - resistance threshold
MW 12x10 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
4.83 kg / 10.65 lbs
4830.0 g / 47.4 N
|
OK |
| 40 °C | -2.2% |
4.72 kg / 10.41 lbs
4723.7 g / 46.3 N
|
OK |
| 60 °C | -4.4% |
4.62 kg / 10.18 lbs
4617.5 g / 45.3 N
|
OK |
| 80 °C | -6.6% |
4.51 kg / 9.95 lbs
4511.2 g / 44.3 N
|
|
| 100 °C | -28.8% |
3.44 kg / 7.58 lbs
3439.0 g / 33.7 N
|
Table 6: Magnet-Magnet interaction (attraction) - field collision
MW 12x10 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
19.64 kg / 43.30 lbs
5 928 Gs
|
2.95 kg / 6.50 lbs
2946 g / 28.9 N
|
N/A |
| 1 mm |
16.52 kg / 36.43 lbs
9 736 Gs
|
2.48 kg / 5.46 lbs
2479 g / 24.3 N
|
14.87 kg / 32.79 lbs
~0 Gs
|
| 2 mm |
13.64 kg / 30.08 lbs
8 847 Gs
|
2.05 kg / 4.51 lbs
2047 g / 20.1 N
|
12.28 kg / 27.07 lbs
~0 Gs
|
| 3 mm |
11.12 kg / 24.51 lbs
7 986 Gs
|
1.67 kg / 3.68 lbs
1668 g / 16.4 N
|
10.01 kg / 22.06 lbs
~0 Gs
|
| 5 mm |
7.16 kg / 15.79 lbs
6 410 Gs
|
1.07 kg / 2.37 lbs
1074 g / 10.5 N
|
6.45 kg / 14.21 lbs
~0 Gs
|
| 10 mm |
2.23 kg / 4.91 lbs
3 575 Gs
|
0.33 kg / 0.74 lbs
334 g / 3.3 N
|
2.00 kg / 4.42 lbs
~0 Gs
|
| 20 mm |
0.27 kg / 0.59 lbs
1 244 Gs
|
0.04 kg / 0.09 lbs
40 g / 0.4 N
|
0.24 kg / 0.54 lbs
~0 Gs
|
| 50 mm |
0.00 kg / 0.01 lbs
164 Gs
|
0.00 kg / 0.00 lbs
1 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
| 60 mm |
0.00 kg / 0.00 lbs
104 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
70 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
49 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
36 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
27 Gs
|
0.00 kg / 0.00 lbs
0 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
Table 7: Hazards (implants) - precautionary measures
MW 12x10 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 7.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 6.0 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 4.5 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 3.5 cm |
| Car key | 50 Gs (5.0 mT) | 3.5 cm |
| Payment card | 400 Gs (40.0 mT) | 1.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.5 cm |
Table 8: Dynamics (cracking risk) - warning
MW 12x10 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
24.27 km/h
(6.74 m/s)
|
0.19 J | |
| 30 mm |
41.69 km/h
(11.58 m/s)
|
0.57 J | |
| 50 mm |
53.82 km/h
(14.95 m/s)
|
0.95 J | |
| 100 mm |
76.11 km/h
(21.14 m/s)
|
1.90 J |
Table 9: Coating parameters (durability)
MW 12x10 / 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) |
Table 10: Electrical data (Pc)
MW 12x10 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 6 105 Mx | 61.1 µWb |
| Pc Coefficient | 0.81 | High (Stable) |
Table 11: Hydrostatics and buoyancy
MW 12x10 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 4.83 kg | Standard |
| Water (riverbed) |
5.53 kg
(+0.70 kg buoyancy gain)
|
+14.5% |
1. Shear force
*Note: On a vertical surface, the magnet holds only approx. 20-30% of its max power.
2. Steel saturation
*Thin steel (e.g. 0.5mm PC case) drastically weakens 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 Pc (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 Pc (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 Pc 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.
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 |
Other offers
Strengths as well as weaknesses of Nd2Fe14B magnets.
Pros
- They retain attractive force for around ten years – the drop is just ~1% (according to analyses),
- Magnets very well resist against demagnetization caused by foreign field sources,
- By covering with a lustrous coating of nickel, the element gains an elegant look,
- They show high magnetic induction at the operating surface, which increases their power,
- Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the shape) even at a temperature of 230°C or more...
- Thanks to the option of flexible molding and adaptation to individualized solutions, magnetic components can be manufactured in a wide range of shapes and sizes, which amplifies use scope,
- Key role in innovative solutions – they serve a role in mass storage devices, brushless drives, medical devices, and other advanced devices.
- Thanks to their power density, small magnets offer high operating force, with minimal size,
Disadvantages
- Brittleness is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a steel housing, which not only secures them against impacts but also increases their durability
- We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
- Magnets exposed to a humid environment can rust. Therefore while using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture
- We suggest casing - magnetic mechanism, due to difficulties in creating threads inside the magnet and complicated shapes.
- Health risk resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which is particularly important in the context of child safety. Furthermore, small elements of these devices are able to disrupt the diagnostic process medical after entering the body.
- Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications
Pull force analysis
Maximum magnetic pulling force – what it depends on?
- on a block made of structural steel, optimally conducting the magnetic flux
- whose transverse dimension equals approx. 10 mm
- with an polished contact surface
- under conditions of no distance (surface-to-surface)
- under vertical application of breakaway force (90-degree angle)
- at ambient temperature approx. 20 degrees Celsius
What influences lifting capacity in practice
- Clearance – existence of foreign body (paint, tape, gap) interrupts the magnetic circuit, which lowers capacity steeply (even by 50% at 0.5 mm).
- Load vector – maximum parameter is reached only during perpendicular pulling. The force required to slide of the magnet along the plate is standardly many times smaller (approx. 1/5 of the lifting capacity).
- Element thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
- Steel grade – ideal substrate is high-permeability steel. Hardened steels may generate lower lifting capacity.
- Surface quality – the more even the surface, the larger the contact zone and stronger the hold. Roughness acts like micro-gaps.
- Temperature influence – high temperature reduces magnetic field. Exceeding the limit temperature can permanently damage the magnet.
Lifting capacity testing was performed on a smooth plate of suitable thickness, under perpendicular forces, however under shearing force the lifting capacity is smaller. Additionally, even a slight gap between the magnet’s surface and the plate reduces the load capacity.
Warnings
Heat sensitivity
Watch the temperature. Heating the magnet to high heat will ruin its magnetic structure and strength.
Sensitization to coating
A percentage of the population experience a contact allergy to Ni, which is the standard coating for neodymium magnets. Prolonged contact may cause skin redness. We suggest use safety gloves.
Safe distance
Very strong magnetic fields can destroy records on credit cards, HDDs, and other magnetic media. Maintain a gap of at least 10 cm.
Keep away from electronics
Remember: neodymium magnets produce a field that confuses precision electronics. Maintain a separation from your mobile, tablet, and GPS.
Health Danger
Medical warning: Strong magnets can turn off pacemakers and defibrillators. Do not approach if you have medical devices.
Safe operation
Before starting, read the rules. Sudden snapping can break the magnet or injure your hand. Think ahead.
Serious injuries
Protect your hands. Two large magnets will snap together immediately with a force of several hundred kilograms, crushing everything in their path. Be careful!
Risk of cracking
Watch out for shards. Magnets can explode upon violent connection, ejecting sharp fragments into the air. We recommend safety glasses.
This is not a toy
Product intended for adults. Tiny parts pose a choking risk, causing severe trauma. Store out of reach of kids and pets.
Dust explosion hazard
Fire warning: Rare earth powder is explosive. Avoid machining magnets in home conditions as this risks ignition.
