MW 33x10 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010057
GTIN/EAN: 5906301810568
Diameter Ø
33 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
64.15 g
Magnetization Direction
↑ axial
Load capacity
23.67 kg / 232.15 N
Magnetic Induction
321.26 mT / 3213 Gs
Coating
[NiCuNi] Nickel
26.52 ZŁ with VAT / pcs + price for transport
21.56 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?
Give us a call
+48 888 99 98 98
alternatively drop us a message by means of
request form
the contact page.
Lifting power along with structure of neodymium magnets can be checked with our
magnetic calculator.
Order by 14:00 and we’ll ship today!
Technical parameters - MW 33x10 / N38 - cylindrical magnet
Specification / characteristics - MW 33x10 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010057 |
| GTIN/EAN | 5906301810568 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 33 mm [±0,1 mm] |
| Height | 10 mm [±0,1 mm] |
| Weight | 64.15 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 23.67 kg / 232.15 N |
| Magnetic Induction ~ ? | 321.26 mT / 3213 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 |
Technical simulation of the product - report
The following data are the direct effect of a engineering calculation. Results are based on algorithms for the class Nd2Fe14B. Operational conditions may deviate from the simulation results. Treat these calculations as a supplementary guide when designing systems.
Table 1: Static force (pull vs distance) - interaction chart
MW 33x10 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3212 Gs
321.2 mT
|
23.67 kg / 52.18 LBS
23670.0 g / 232.2 N
|
critical level |
| 1 mm |
3064 Gs
306.4 mT
|
21.54 kg / 47.49 LBS
21539.1 g / 211.3 N
|
critical level |
| 2 mm |
2901 Gs
290.1 mT
|
19.30 kg / 42.55 LBS
19302.3 g / 189.4 N
|
critical level |
| 3 mm |
2728 Gs
272.8 mT
|
17.07 kg / 37.64 LBS
17072.3 g / 167.5 N
|
critical level |
| 5 mm |
2373 Gs
237.3 mT
|
12.91 kg / 28.47 LBS
12913.7 g / 126.7 N
|
critical level |
| 10 mm |
1569 Gs
156.9 mT
|
5.65 kg / 12.45 LBS
5648.1 g / 55.4 N
|
warning |
| 15 mm |
1004 Gs
100.4 mT
|
2.31 kg / 5.10 LBS
2312.6 g / 22.7 N
|
warning |
| 20 mm |
650 Gs
65.0 mT
|
0.97 kg / 2.14 LBS
969.4 g / 9.5 N
|
weak grip |
| 30 mm |
299 Gs
29.9 mT
|
0.21 kg / 0.45 LBS
205.1 g / 2.0 N
|
weak grip |
| 50 mm |
90 Gs
9.0 mT
|
0.02 kg / 0.04 LBS
18.7 g / 0.2 N
|
weak grip |
Table 2: Sliding capacity (vertical surface)
MW 33x10 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
4.73 kg / 10.44 LBS
4734.0 g / 46.4 N
|
| 1 mm | Stal (~0.2) |
4.31 kg / 9.50 LBS
4308.0 g / 42.3 N
|
| 2 mm | Stal (~0.2) |
3.86 kg / 8.51 LBS
3860.0 g / 37.9 N
|
| 3 mm | Stal (~0.2) |
3.41 kg / 7.53 LBS
3414.0 g / 33.5 N
|
| 5 mm | Stal (~0.2) |
2.58 kg / 5.69 LBS
2582.0 g / 25.3 N
|
| 10 mm | Stal (~0.2) |
1.13 kg / 2.49 LBS
1130.0 g / 11.1 N
|
| 15 mm | Stal (~0.2) |
0.46 kg / 1.02 LBS
462.0 g / 4.5 N
|
| 20 mm | Stal (~0.2) |
0.19 kg / 0.43 LBS
194.0 g / 1.9 N
|
| 30 mm | Stal (~0.2) |
0.04 kg / 0.09 LBS
42.0 g / 0.4 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.01 LBS
4.0 g / 0.0 N
|
Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MW 33x10 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
7.10 kg / 15.66 LBS
7101.0 g / 69.7 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
4.73 kg / 10.44 LBS
4734.0 g / 46.4 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
2.37 kg / 5.22 LBS
2367.0 g / 23.2 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
11.84 kg / 26.09 LBS
11835.0 g / 116.1 N
|
Table 4: Material efficiency (substrate influence) - sheet metal selection
MW 33x10 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
1.18 kg / 2.61 LBS
1183.5 g / 11.6 N
|
| 1 mm |
|
2.96 kg / 6.52 LBS
2958.8 g / 29.0 N
|
| 2 mm |
|
5.92 kg / 13.05 LBS
5917.5 g / 58.1 N
|
| 3 mm |
|
8.88 kg / 19.57 LBS
8876.3 g / 87.1 N
|
| 5 mm |
|
14.79 kg / 32.61 LBS
14793.8 g / 145.1 N
|
| 10 mm |
|
23.67 kg / 52.18 LBS
23670.0 g / 232.2 N
|
| 11 mm |
|
23.67 kg / 52.18 LBS
23670.0 g / 232.2 N
|
| 12 mm |
|
23.67 kg / 52.18 LBS
23670.0 g / 232.2 N
|
Table 5: Thermal stability (material behavior) - resistance threshold
MW 33x10 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
23.67 kg / 52.18 LBS
23670.0 g / 232.2 N
|
OK |
| 40 °C | -2.2% |
23.15 kg / 51.04 LBS
23149.3 g / 227.1 N
|
OK |
| 60 °C | -4.4% |
22.63 kg / 49.89 LBS
22628.5 g / 222.0 N
|
|
| 80 °C | -6.6% |
22.11 kg / 48.74 LBS
22107.8 g / 216.9 N
|
|
| 100 °C | -28.8% |
16.85 kg / 37.15 LBS
16853.0 g / 165.3 N
|
Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 33x10 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
54.40 kg / 119.94 LBS
4 780 Gs
|
8.16 kg / 17.99 LBS
8160 g / 80.1 N
|
N/A |
| 1 mm |
52.02 kg / 114.68 LBS
6 282 Gs
|
7.80 kg / 17.20 LBS
7803 g / 76.5 N
|
46.82 kg / 103.21 LBS
~0 Gs
|
| 2 mm |
49.51 kg / 109.14 LBS
6 128 Gs
|
7.43 kg / 16.37 LBS
7426 g / 72.8 N
|
44.55 kg / 98.23 LBS
~0 Gs
|
| 3 mm |
46.95 kg / 103.50 LBS
5 968 Gs
|
7.04 kg / 15.52 LBS
7042 g / 69.1 N
|
42.25 kg / 93.15 LBS
~0 Gs
|
| 5 mm |
41.79 kg / 92.13 LBS
5 630 Gs
|
6.27 kg / 13.82 LBS
6268 g / 61.5 N
|
37.61 kg / 82.91 LBS
~0 Gs
|
| 10 mm |
29.68 kg / 65.43 LBS
4 745 Gs
|
4.45 kg / 9.82 LBS
4452 g / 43.7 N
|
26.71 kg / 58.89 LBS
~0 Gs
|
| 20 mm |
12.98 kg / 28.62 LBS
3 138 Gs
|
1.95 kg / 4.29 LBS
1947 g / 19.1 N
|
11.68 kg / 25.76 LBS
~0 Gs
|
| 50 mm |
0.99 kg / 2.18 LBS
867 Gs
|
0.15 kg / 0.33 LBS
149 g / 1.5 N
|
0.89 kg / 1.97 LBS
~0 Gs
|
| 60 mm |
0.47 kg / 1.04 LBS
598 Gs
|
0.07 kg / 0.16 LBS
71 g / 0.7 N
|
0.42 kg / 0.94 LBS
~0 Gs
|
| 70 mm |
0.24 kg / 0.53 LBS
426 Gs
|
0.04 kg / 0.08 LBS
36 g / 0.4 N
|
0.22 kg / 0.47 LBS
~0 Gs
|
| 80 mm |
0.13 kg / 0.28 LBS
312 Gs
|
0.02 kg / 0.04 LBS
19 g / 0.2 N
|
0.12 kg / 0.26 LBS
~0 Gs
|
| 90 mm |
0.07 kg / 0.16 LBS
235 Gs
|
0.01 kg / 0.02 LBS
11 g / 0.1 N
|
0.07 kg / 0.14 LBS
~0 Gs
|
| 100 mm |
0.04 kg / 0.09 LBS
181 Gs
|
0.01 kg / 0.01 LBS
6 g / 0.1 N
|
0.04 kg / 0.09 LBS
~0 Gs
|
Table 7: Safety (HSE) (electronics) - precautionary measures
MW 33x10 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 14.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 11.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 9.0 cm |
| Mobile device | 40 Gs (4.0 mT) | 7.0 cm |
| Remote | 50 Gs (5.0 mT) | 6.5 cm |
| Payment card | 400 Gs (40.0 mT) | 3.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 2.5 cm |
Table 8: Dynamics (kinetic energy) - collision effects
MW 33x10 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
22.07 km/h
(6.13 m/s)
|
1.21 J | |
| 30 mm |
33.74 km/h
(9.37 m/s)
|
2.82 J | |
| 50 mm |
43.34 km/h
(12.04 m/s)
|
4.65 J | |
| 100 mm |
61.26 km/h
(17.02 m/s)
|
9.29 J |
Table 9: Corrosion resistance
MW 33x10 / 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: Construction data (Pc)
MW 33x10 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 29 509 Mx | 295.1 µWb |
| Pc Coefficient | 0.40 | Low (Flat) |
Table 11: Physics of underwater searching
MW 33x10 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 23.67 kg | Standard |
| Water (riverbed) |
27.10 kg
(+3.43 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Warning: On a vertical wall, the magnet holds only a fraction of its max power.
2. Steel saturation
*Thin steel (e.g. computer case) severely limits the holding force.
3. Heat tolerance
*For N38 grade, the max working temp is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.40
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% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other proposals
Strengths as well as weaknesses of Nd2Fe14B magnets.
Benefits
- They have constant strength, and over more than 10 years their attraction force decreases symbolically – ~1% (in testing),
- They are extremely resistant to demagnetization induced by external disturbances,
- A magnet with a smooth gold surface has better aesthetics,
- Magnetic induction on the top side of the magnet remains strong,
- Through (adequate) combination of ingredients, they can achieve high thermal strength, allowing for operation at temperatures reaching 230°C and above...
- Thanks to versatility in constructing and the capacity to modify to specific needs,
- Key role in future technologies – they are utilized in computer drives, electric drive systems, advanced medical instruments, also industrial machines.
- Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which enables their usage in compact constructions
Weaknesses
- Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We recommend keeping them in a special holder, which not only secures them against impacts but also increases their durability
- We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
- They rust in a humid environment - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
- Limited possibility of making nuts in the magnet and complex shapes - recommended is a housing - mounting mechanism.
- Potential hazard to health – tiny shards of magnets pose a threat, in case of ingestion, which is particularly important in the aspect of protecting the youngest. It is also worth noting that small elements of these products are able to disrupt the diagnostic process medical when they are in 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
Pull force analysis
Maximum lifting capacity of the magnet – what contributes to it?
- on a block made of mild steel, effectively closing the magnetic flux
- possessing a thickness of minimum 10 mm to ensure full flux closure
- with a plane perfectly flat
- under conditions of no distance (metal-to-metal)
- for force applied at a right angle (pull-off, not shear)
- at conditions approx. 20°C
Practical lifting capacity: influencing factors
- Distance (between the magnet and the plate), since even a tiny clearance (e.g. 0.5 mm) leads to a drastic drop in force by up to 50% (this also applies to paint, rust or debris).
- Angle of force application – highest force is reached only during perpendicular pulling. The shear force of the magnet along the surface is usually several times lower (approx. 1/5 of the lifting capacity).
- Plate thickness – insufficiently thick plate causes magnetic saturation, causing part of the power to be lost into the air.
- Steel grade – the best choice is high-permeability steel. Cast iron may generate lower lifting capacity.
- Surface finish – full contact is possible only on smooth steel. Any scratches and bumps reduce the real contact area, reducing force.
- Thermal environment – temperature increase causes a temporary drop of force. It is worth remembering the maximum operating temperature for a given model.
Lifting capacity testing was performed on plates with a smooth surface of suitable thickness, under perpendicular forces, however under shearing force the load capacity is reduced by as much as fivefold. Moreover, even a slight gap between the magnet and the plate decreases the lifting capacity.
Safety rules for work with neodymium magnets
Protective goggles
Watch out for shards. Magnets can explode upon violent connection, ejecting sharp fragments into the air. We recommend safety glasses.
Phone sensors
Note: rare earth magnets generate a field that disrupts precision electronics. Maintain a safe distance from your mobile, tablet, and GPS.
Swallowing risk
Neodymium magnets are not toys. Accidental ingestion of multiple magnets may result in them connecting inside the digestive tract, which constitutes a critical condition and requires immediate surgery.
Keep away from computers
Do not bring magnets near a purse, laptop, or screen. The magnetic field can permanently damage these devices and erase data from cards.
Avoid contact if allergic
Allergy Notice: The nickel-copper-nickel coating consists of nickel. If an allergic reaction occurs, immediately stop handling magnets and wear gloves.
Do not overheat magnets
Watch the temperature. Heating the magnet to high heat will ruin its magnetic structure and pulling force.
Physical harm
Watch your fingers. Two large magnets will snap together immediately with a force of several hundred kilograms, crushing everything in their path. Exercise extreme caution!
Health Danger
Patients with a pacemaker have to maintain an absolute distance from magnets. The magnetism can interfere with the operation of the implant.
Caution required
Handle magnets with awareness. Their huge power can surprise even experienced users. Be vigilant and respect their force.
Combustion hazard
Dust created during machining of magnets is self-igniting. Avoid drilling into magnets unless you are an expert.
