MW 70x60 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010098
GTIN/EAN: 5906301810971
Diameter Ø
70 mm [±0,1 mm]
Height
60 mm [±0,1 mm]
Weight
1731.8 g
Magnetization Direction
↑ axial
Load capacity
163.93 kg / 1608.16 N
Magnetic Induction
535.45 mT / 5354 Gs
Coating
[NiCuNi] Nickel
630.01 ZŁ with VAT / pcs + price for transport
512.20 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?
Give us a call
+48 22 499 98 98
alternatively send us a note through
contact form
the contact page.
Force as well as appearance of magnets can be reviewed with our
force calculator.
Order by 14:00 and we’ll ship today!
Technical specification of the product - MW 70x60 / N38 - cylindrical magnet
Specification / characteristics - MW 70x60 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010098 |
| GTIN/EAN | 5906301810971 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 70 mm [±0,1 mm] |
| Height | 60 mm [±0,1 mm] |
| Weight | 1731.8 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 163.93 kg / 1608.16 N |
| Magnetic Induction ~ ? | 535.45 mT / 5354 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 |
Physical analysis of the product - report
The following data are the result of a engineering analysis. Values rely on algorithms for the material Nd2Fe14B. Operational conditions may differ from theoretical values. Use these data as a supplementary guide during assembly planning.
Table 1: Static pull force (pull vs gap) - characteristics
MW 70x60 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
5354 Gs
535.4 mT
|
163.93 kg / 361.40 LBS
163930.0 g / 1608.2 N
|
crushing |
| 1 mm |
5201 Gs
520.1 mT
|
154.68 kg / 341.01 LBS
154677.8 g / 1517.4 N
|
crushing |
| 2 mm |
5045 Gs
504.5 mT
|
145.58 kg / 320.96 LBS
145583.5 g / 1428.2 N
|
crushing |
| 3 mm |
4890 Gs
489.0 mT
|
136.77 kg / 301.52 LBS
136769.5 g / 1341.7 N
|
crushing |
| 5 mm |
4582 Gs
458.2 mT
|
120.07 kg / 264.72 LBS
120074.6 g / 1177.9 N
|
crushing |
| 10 mm |
3842 Gs
384.2 mT
|
84.43 kg / 186.13 LBS
84425.8 g / 828.2 N
|
crushing |
| 15 mm |
3176 Gs
317.6 mT
|
57.69 kg / 127.18 LBS
57688.8 g / 565.9 N
|
crushing |
| 20 mm |
2604 Gs
260.4 mT
|
38.78 kg / 85.50 LBS
38782.9 g / 380.5 N
|
crushing |
| 30 mm |
1744 Gs
174.4 mT
|
17.39 kg / 38.33 LBS
17385.0 g / 170.5 N
|
crushing |
| 50 mm |
829 Gs
82.9 mT
|
3.93 kg / 8.66 LBS
3929.4 g / 38.5 N
|
medium risk |
Table 2: Shear load (vertical surface)
MW 70x60 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
32.79 kg / 72.28 LBS
32786.0 g / 321.6 N
|
| 1 mm | Stal (~0.2) |
30.94 kg / 68.20 LBS
30936.0 g / 303.5 N
|
| 2 mm | Stal (~0.2) |
29.12 kg / 64.19 LBS
29116.0 g / 285.6 N
|
| 3 mm | Stal (~0.2) |
27.35 kg / 60.31 LBS
27354.0 g / 268.3 N
|
| 5 mm | Stal (~0.2) |
24.01 kg / 52.94 LBS
24014.0 g / 235.6 N
|
| 10 mm | Stal (~0.2) |
16.89 kg / 37.23 LBS
16886.0 g / 165.7 N
|
| 15 mm | Stal (~0.2) |
11.54 kg / 25.44 LBS
11538.0 g / 113.2 N
|
| 20 mm | Stal (~0.2) |
7.76 kg / 17.10 LBS
7756.0 g / 76.1 N
|
| 30 mm | Stal (~0.2) |
3.48 kg / 7.67 LBS
3478.0 g / 34.1 N
|
| 50 mm | Stal (~0.2) |
0.79 kg / 1.73 LBS
786.0 g / 7.7 N
|
Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MW 70x60 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
49.18 kg / 108.42 LBS
49179.0 g / 482.4 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
32.79 kg / 72.28 LBS
32786.0 g / 321.6 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
16.39 kg / 36.14 LBS
16393.0 g / 160.8 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
81.97 kg / 180.70 LBS
81965.0 g / 804.1 N
|
Table 4: Material efficiency (saturation) - sheet metal selection
MW 70x60 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
5.46 kg / 12.05 LBS
5464.3 g / 53.6 N
|
| 1 mm |
|
13.66 kg / 30.12 LBS
13660.8 g / 134.0 N
|
| 2 mm |
|
27.32 kg / 60.23 LBS
27321.7 g / 268.0 N
|
| 3 mm |
|
40.98 kg / 90.35 LBS
40982.5 g / 402.0 N
|
| 5 mm |
|
68.30 kg / 150.58 LBS
68304.2 g / 670.1 N
|
| 10 mm |
|
136.61 kg / 301.17 LBS
136608.3 g / 1340.1 N
|
| 11 mm |
|
150.27 kg / 331.29 LBS
150269.2 g / 1474.1 N
|
| 12 mm |
|
163.93 kg / 361.40 LBS
163930.0 g / 1608.2 N
|
Table 5: Thermal resistance (material behavior) - thermal limit
MW 70x60 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
163.93 kg / 361.40 LBS
163930.0 g / 1608.2 N
|
OK |
| 40 °C | -2.2% |
160.32 kg / 353.45 LBS
160323.5 g / 1572.8 N
|
OK |
| 60 °C | -4.4% |
156.72 kg / 345.50 LBS
156717.1 g / 1537.4 N
|
OK |
| 80 °C | -6.6% |
153.11 kg / 337.55 LBS
153110.6 g / 1502.0 N
|
|
| 100 °C | -28.8% |
116.72 kg / 257.32 LBS
116718.2 g / 1145.0 N
|
Table 6: Magnet-Magnet interaction (repulsion) - field range
MW 70x60 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
680.08 kg / 1499.31 LBS
5 950 Gs
|
102.01 kg / 224.90 LBS
102012 g / 1000.7 N
|
N/A |
| 1 mm |
660.96 kg / 1457.16 LBS
10 556 Gs
|
99.14 kg / 218.57 LBS
99144 g / 972.6 N
|
594.86 kg / 1311.45 LBS
~0 Gs
|
| 2 mm |
641.69 kg / 1414.69 LBS
10 401 Gs
|
96.25 kg / 212.20 LBS
96254 g / 944.3 N
|
577.52 kg / 1273.22 LBS
~0 Gs
|
| 3 mm |
622.69 kg / 1372.80 LBS
10 246 Gs
|
93.40 kg / 205.92 LBS
93404 g / 916.3 N
|
560.42 kg / 1235.52 LBS
~0 Gs
|
| 5 mm |
585.53 kg / 1290.87 LBS
9 936 Gs
|
87.83 kg / 193.63 LBS
87830 g / 861.6 N
|
526.98 kg / 1161.79 LBS
~0 Gs
|
| 10 mm |
498.14 kg / 1098.21 LBS
9 164 Gs
|
74.72 kg / 164.73 LBS
74721 g / 733.0 N
|
448.33 kg / 988.39 LBS
~0 Gs
|
| 20 mm |
350.25 kg / 772.16 LBS
7 684 Gs
|
52.54 kg / 115.82 LBS
52537 g / 515.4 N
|
315.22 kg / 694.95 LBS
~0 Gs
|
| 50 mm |
107.57 kg / 237.16 LBS
4 259 Gs
|
16.14 kg / 35.57 LBS
16136 g / 158.3 N
|
96.82 kg / 213.44 LBS
~0 Gs
|
| 60 mm |
72.12 kg / 159.00 LBS
3 487 Gs
|
10.82 kg / 23.85 LBS
10818 g / 106.1 N
|
64.91 kg / 143.10 LBS
~0 Gs
|
| 70 mm |
48.77 kg / 107.51 LBS
2 867 Gs
|
7.31 kg / 16.13 LBS
7315 g / 71.8 N
|
43.89 kg / 96.76 LBS
~0 Gs
|
| 80 mm |
33.37 kg / 73.57 LBS
2 372 Gs
|
5.01 kg / 11.04 LBS
5005 g / 49.1 N
|
30.03 kg / 66.21 LBS
~0 Gs
|
| 90 mm |
23.15 kg / 51.04 LBS
1 976 Gs
|
3.47 kg / 7.66 LBS
3473 g / 34.1 N
|
20.84 kg / 45.94 LBS
~0 Gs
|
| 100 mm |
16.30 kg / 35.94 LBS
1 658 Gs
|
2.45 kg / 5.39 LBS
2445 g / 24.0 N
|
14.67 kg / 32.34 LBS
~0 Gs
|
Table 7: Safety (HSE) (implants) - warnings
MW 70x60 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 42.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 33.0 cm |
| Timepiece | 20 Gs (2.0 mT) | 25.5 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 19.5 cm |
| Car key | 50 Gs (5.0 mT) | 18.0 cm |
| Payment card | 400 Gs (40.0 mT) | 7.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 6.0 cm |
Table 8: Dynamics (kinetic energy) - warning
MW 70x60 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
12.58 km/h
(3.49 m/s)
|
10.57 J | |
| 30 mm |
18.09 km/h
(5.02 m/s)
|
21.86 J | |
| 50 mm |
22.27 km/h
(6.19 m/s)
|
33.13 J | |
| 100 mm |
31.06 km/h
(8.63 m/s)
|
64.44 J |
Table 9: Coating parameters (durability)
MW 70x60 / 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 (Flux)
MW 70x60 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 209 626 Mx | 2096.3 µWb |
| Pc Coefficient | 0.82 | High (Stable) |
Table 11: Submerged application
MW 70x60 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 163.93 kg | Standard |
| Water (riverbed) |
187.70 kg
(+23.77 kg buoyancy gain)
|
+14.5% |
1. Shear force
*Note: On a vertical surface, the magnet holds just ~20% 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 critical limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.82
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 |
View also products
Advantages and disadvantages of neodymium magnets.
Pros
- They retain attractive force for nearly 10 years – the loss is just ~1% (in theory),
- Magnets very well protect themselves against loss of magnetization caused by foreign field sources,
- In other words, due to the metallic finish of nickel, the element gains visual value,
- Magnets exhibit huge magnetic induction on the outer side,
- Through (adequate) combination of ingredients, they can achieve high thermal resistance, allowing for functioning at temperatures reaching 230°C and above...
- Possibility of precise modeling as well as optimizing to individual requirements,
- Fundamental importance in high-tech industry – they find application in hard drives, electromotive mechanisms, medical devices, also industrial machines.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which makes them useful in miniature devices
Disadvantages
- To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution protects the magnet and simultaneously improves 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
- Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
- Due to limitations in creating threads and complicated forms in magnets, we recommend using cover - magnetic mechanism.
- Potential hazard related to microscopic parts of magnets pose a threat, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. Furthermore, small components of these devices can complicate diagnosis medical in case of swallowing.
- High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which increases costs of application in large quantities
Lifting parameters
Best holding force of the magnet in ideal parameters – what it depends on?
- on a block made of mild steel, effectively closing the magnetic flux
- possessing a massiveness of minimum 10 mm to ensure full flux closure
- with an ground touching surface
- under conditions of ideal adhesion (surface-to-surface)
- under axial application of breakaway force (90-degree angle)
- at temperature room level
Determinants of lifting force in real conditions
- Gap between surfaces – every millimeter of separation (caused e.g. by veneer or dirt) diminishes the magnet efficiency, often by half at just 0.5 mm.
- Loading method – catalog parameter refers to detachment vertically. When attempting to slide, the magnet exhibits significantly lower power (often approx. 20-30% of nominal force).
- Base massiveness – insufficiently thick plate does not accept the full field, causing part of the flux to be escaped to the other side.
- Material type – ideal substrate is high-permeability steel. Cast iron may attract less.
- Surface quality – the more even the surface, the larger the contact zone and stronger the hold. Roughness acts like micro-gaps.
- Temperature – heating the magnet results in weakening of induction. Check the thermal limit for a given model.
Lifting capacity was assessed with the use of a steel plate with a smooth surface of suitable thickness (min. 20 mm), under vertically applied force, however under attempts to slide the magnet the lifting capacity is smaller. In addition, even a minimal clearance between the magnet’s surface and the plate lowers the load capacity.
Warnings
Danger to the youngest
Adult use only. Small elements can be swallowed, causing intestinal necrosis. Store out of reach of kids and pets.
Thermal limits
Avoid heat. NdFeB magnets are sensitive to temperature. If you need operation above 80°C, look for special high-temperature series (H, SH, UH).
Keep away from computers
Equipment safety: Strong magnets can ruin payment cards and delicate electronics (pacemakers, medical aids, timepieces).
Risk of cracking
Neodymium magnets are ceramic materials, which means they are very brittle. Clashing of two magnets will cause them cracking into shards.
Finger safety
Risk of injury: The attraction force is so immense that it can cause hematomas, pinching, and even bone fractures. Protective gloves are recommended.
Implant safety
Individuals with a ICD have to keep an safe separation from magnets. The magnetism can stop the operation of the life-saving device.
Nickel coating and allergies
Warning for allergy sufferers: The nickel-copper-nickel coating consists of nickel. If skin irritation appears, cease working with magnets and wear gloves.
Fire risk
Machining of NdFeB material carries a risk of fire risk. Magnetic powder reacts violently with oxygen and is hard to extinguish.
Phone sensors
A strong magnetic field disrupts the functioning of magnetometers in smartphones and GPS navigation. Keep magnets near a smartphone to prevent damaging the sensors.
Caution required
Before use, check safety instructions. Sudden snapping can destroy the magnet or hurt your hand. Think ahead.
