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MW 33x30 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010058

GTIN/EAN: 5906301810575

Diameter Ø

33 mm [±0,1 mm]

Height

30 mm [±0,1 mm]

Weight

192.44 g

Magnetization Direction

↑ axial

Load capacity

35.84 kg / 351.54 N

Magnetic Induction

543.05 mT / 5430 Gs

Coating

[NiCuNi] Nickel

52.89 with VAT / pcs + price for transport

43.00 ZŁ net + 23% VAT / pcs

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Technical of the product - MW 33x30 / N38 - cylindrical magnet

Specification / characteristics - MW 33x30 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010058
GTIN/EAN 5906301810575
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 Ø 33 mm [±0,1 mm]
Height 30 mm [±0,1 mm]
Weight 192.44 g
Magnetization Direction ↑ axial
Load capacity ~ ? 35.84 kg / 351.54 N
Magnetic Induction ~ ? 543.05 mT / 5430 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 33x30 / N38 - cylindrical 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

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 simulation of the product - report

Presented values represent the direct effect of a engineering simulation. Values were calculated on models for the class Nd2Fe14B. Operational performance might slightly deviate from the simulation results. Use these calculations as a preliminary roadmap during assembly planning.

Table 1: Static pull force (force vs distance) - interaction chart
MW 33x30 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 5429 Gs
542.9 mT
35.84 kg / 79.01 lbs
35840.0 g / 351.6 N
crushing
1 mm 5098 Gs
509.8 mT
31.60 kg / 69.67 lbs
31600.1 g / 310.0 N
crushing
2 mm 4765 Gs
476.5 mT
27.60 kg / 60.85 lbs
27601.7 g / 270.8 N
crushing
3 mm 4436 Gs
443.6 mT
23.93 kg / 52.76 lbs
23930.4 g / 234.8 N
crushing
5 mm 3810 Gs
381.0 mT
17.65 kg / 38.91 lbs
17650.2 g / 173.1 N
crushing
10 mm 2518 Gs
251.8 mT
7.71 kg / 17.00 lbs
7709.5 g / 75.6 N
warning
15 mm 1650 Gs
165.0 mT
3.31 kg / 7.30 lbs
3312.1 g / 32.5 N
warning
20 mm 1105 Gs
110.5 mT
1.49 kg / 3.27 lbs
1485.1 g / 14.6 N
low risk
30 mm 546 Gs
54.6 mT
0.36 kg / 0.80 lbs
361.9 g / 3.5 N
low risk
50 mm 184 Gs
18.4 mT
0.04 kg / 0.09 lbs
41.4 g / 0.4 N
low risk

Table 2: Slippage capacity (vertical surface)
MW 33x30 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 7.17 kg / 15.80 lbs
7168.0 g / 70.3 N
1 mm Stal (~0.2) 6.32 kg / 13.93 lbs
6320.0 g / 62.0 N
2 mm Stal (~0.2) 5.52 kg / 12.17 lbs
5520.0 g / 54.2 N
3 mm Stal (~0.2) 4.79 kg / 10.55 lbs
4786.0 g / 47.0 N
5 mm Stal (~0.2) 3.53 kg / 7.78 lbs
3530.0 g / 34.6 N
10 mm Stal (~0.2) 1.54 kg / 3.40 lbs
1542.0 g / 15.1 N
15 mm Stal (~0.2) 0.66 kg / 1.46 lbs
662.0 g / 6.5 N
20 mm Stal (~0.2) 0.30 kg / 0.66 lbs
298.0 g / 2.9 N
30 mm Stal (~0.2) 0.07 kg / 0.16 lbs
72.0 g / 0.7 N
50 mm Stal (~0.2) 0.01 kg / 0.02 lbs
8.0 g / 0.1 N

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MW 33x30 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
10.75 kg / 23.70 lbs
10752.0 g / 105.5 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
7.17 kg / 15.80 lbs
7168.0 g / 70.3 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
3.58 kg / 7.90 lbs
3584.0 g / 35.2 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
17.92 kg / 39.51 lbs
17920.0 g / 175.8 N

Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 33x30 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
1.79 kg / 3.95 lbs
1792.0 g / 17.6 N
1 mm
13%
4.48 kg / 9.88 lbs
4480.0 g / 43.9 N
2 mm
25%
8.96 kg / 19.75 lbs
8960.0 g / 87.9 N
3 mm
38%
13.44 kg / 29.63 lbs
13440.0 g / 131.8 N
5 mm
63%
22.40 kg / 49.38 lbs
22400.0 g / 219.7 N
10 mm
100%
35.84 kg / 79.01 lbs
35840.0 g / 351.6 N
11 mm
100%
35.84 kg / 79.01 lbs
35840.0 g / 351.6 N
12 mm
100%
35.84 kg / 79.01 lbs
35840.0 g / 351.6 N

Table 5: Thermal stability (stability) - thermal limit
MW 33x30 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 35.84 kg / 79.01 lbs
35840.0 g / 351.6 N
OK
40 °C -2.2% 35.05 kg / 77.28 lbs
35051.5 g / 343.9 N
OK
60 °C -4.4% 34.26 kg / 75.54 lbs
34263.0 g / 336.1 N
OK
80 °C -6.6% 33.47 kg / 73.80 lbs
33474.6 g / 328.4 N
100 °C -28.8% 25.52 kg / 56.26 lbs
25518.1 g / 250.3 N

Table 6: Magnet-Magnet interaction (repulsion) - field range
MW 33x30 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 155.43 kg / 342.66 lbs
5 974 Gs
23.31 kg / 51.40 lbs
23314 g / 228.7 N
N/A
1 mm 146.19 kg / 322.29 lbs
10 531 Gs
21.93 kg / 48.34 lbs
21928 g / 215.1 N
131.57 kg / 290.06 lbs
~0 Gs
2 mm 137.04 kg / 302.12 lbs
10 196 Gs
20.56 kg / 45.32 lbs
20556 g / 201.7 N
123.34 kg / 271.91 lbs
~0 Gs
3 mm 128.20 kg / 282.64 lbs
9 862 Gs
19.23 kg / 42.40 lbs
19230 g / 188.6 N
115.38 kg / 254.37 lbs
~0 Gs
5 mm 111.55 kg / 245.93 lbs
9 199 Gs
16.73 kg / 36.89 lbs
16733 g / 164.2 N
100.40 kg / 221.34 lbs
~0 Gs
10 mm 76.54 kg / 168.75 lbs
7 620 Gs
11.48 kg / 25.31 lbs
11481 g / 112.6 N
68.89 kg / 151.87 lbs
~0 Gs
20 mm 33.43 kg / 73.71 lbs
5 036 Gs
5.02 kg / 11.06 lbs
5015 g / 49.2 N
30.09 kg / 66.34 lbs
~0 Gs
50 mm 3.08 kg / 6.78 lbs
1 528 Gs
0.46 kg / 1.02 lbs
462 g / 4.5 N
2.77 kg / 6.11 lbs
~0 Gs
60 mm 1.57 kg / 3.46 lbs
1 091 Gs
0.24 kg / 0.52 lbs
235 g / 2.3 N
1.41 kg / 3.11 lbs
~0 Gs
70 mm 0.85 kg / 1.87 lbs
803 Gs
0.13 kg / 0.28 lbs
127 g / 1.2 N
0.76 kg / 1.69 lbs
~0 Gs
80 mm 0.48 kg / 1.07 lbs
606 Gs
0.07 kg / 0.16 lbs
73 g / 0.7 N
0.44 kg / 0.96 lbs
~0 Gs
90 mm 0.29 kg / 0.64 lbs
468 Gs
0.04 kg / 0.10 lbs
43 g / 0.4 N
0.26 kg / 0.57 lbs
~0 Gs
100 mm 0.18 kg / 0.40 lbs
369 Gs
0.03 kg / 0.06 lbs
27 g / 0.3 N
0.16 kg / 0.36 lbs
~0 Gs

Table 7: Hazards (electronics) - warnings
MW 33x30 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 20.5 cm
Hearing aid 10 Gs (1.0 mT) 16.0 cm
Timepiece 20 Gs (2.0 mT) 12.5 cm
Mobile device 40 Gs (4.0 mT) 9.5 cm
Remote 50 Gs (5.0 mT) 9.0 cm
Payment card 400 Gs (40.0 mT) 4.0 cm
HDD hard drive 600 Gs (60.0 mT) 3.0 cm

Table 8: Impact energy (cracking risk) - warning
MW 33x30 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 15.50 km/h
(4.31 m/s)
1.78 J
30 mm 23.99 km/h
(6.66 m/s)
4.27 J
50 mm 30.80 km/h
(8.55 m/s)
7.04 J
100 mm 43.52 km/h
(12.09 m/s)
14.06 J

Table 9: Anti-corrosion coating durability
MW 33x30 / 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 33x30 / N38

Parameter Value SI Unit / Description
Magnetic Flux 47 447 Mx 474.5 µWb
Pc Coefficient 0.85 High (Stable)

Table 11: Underwater work (magnet fishing)
MW 33x30 / N38

Environment Effective steel pull Effect
Air (land) 35.84 kg Standard
Water (riverbed) 41.04 kg
(+5.20 kg buoyancy gain)
+14.5%
Warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Wall mount (shear)

*Note: On a vertical surface, the magnet holds just ~20% of its perpendicular strength.

2. Plate thickness effect

*Thin metal sheet (e.g. 0.5mm PC case) drastically limits the holding force.

3. Temperature resistance

*For standard magnets, the critical limit is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.85

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.

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: 010058-2026
Measurement Calculator
Force (pull)

Magnetic Field

Other offers

The presented product is an incredibly powerful cylindrical magnet, made from modern NdFeB material, which, with dimensions of Ø33x30 mm, guarantees optimal power. This specific item features a tolerance of ±0.1mm and professional build quality, making it an excellent solution for professional engineers and designers. As a cylindrical magnet with impressive force (approx. 35.84 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring quick order fulfillment. Furthermore, its Ni-Cu-Ni coating shields it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
It successfully proves itself in DIY projects, advanced robotics, and broadly understood industry, serving as a fastening or actuating element. Thanks to the high power of 351.54 N with a weight of only 192.44 g, this rod is indispensable in miniature devices and wherever every gram matters.
Due to the brittleness of the NdFeB material, you must not use force-fitting (so-called press-fit), as this risks chipping the coating of this precision component. To ensure stability in automation, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.
Grade N38 is the most frequently chosen standard for industrial neodymium magnets, offering a great economic balance and operational stability. If you need even stronger magnets in the same volume (Ø33x30), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our warehouse.
The presented product is a neodymium magnet with precisely defined parameters: diameter 33 mm and height 30 mm. The value of 351.54 N means that the magnet is capable of holding a weight many times exceeding its own mass of 192.44 g. The product has a [NiCuNi] coating, which protects the surface against oxidation, giving it an aesthetic, silvery shine.
This cylinder is magnetized axially (along the height of 30 mm), which means that the N and S poles are located on the flat, circular surfaces. Thanks to this, the magnet can be easily glued into a hole and achieve a strong field on the front surface. On request, we can also produce versions magnetized through the diameter if your project requires it.

Advantages and disadvantages of rare earth magnets.

Benefits

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:
  • They virtually do not lose strength, because even after 10 years the decline in efficiency is only ~1% (based on calculations),
  • They are extremely resistant to demagnetization induced by external magnetic fields,
  • The use of an refined layer of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
  • Magnetic induction on the working part of the magnet remains extremely intense,
  • Through (appropriate) combination of ingredients, they can achieve high thermal strength, enabling action at temperatures reaching 230°C and above...
  • Possibility of precise creating as well as adapting to individual requirements,
  • Key role in advanced technology sectors – they are used in magnetic memories, motor assemblies, precision medical tools, also complex engineering applications.
  • Thanks to concentrated force, small magnets offer high operating force, with minimal size,

Weaknesses

Disadvantages of neodymium magnets:
  • At strong impacts they can crack, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
  • We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
  • Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
  • Limited possibility of making nuts in the magnet and complicated forms - recommended is casing - magnet mounting.
  • Health risk related to microscopic parts of magnets pose a threat, in case of ingestion, which becomes key in the context of child health protection. Furthermore, small elements of these magnets can complicate diagnosis medical in case of swallowing.
  • Due to neodymium price, their price is relatively high,

Pull force analysis

Magnetic strength at its maximum – what contributes to it?

The declared magnet strength refers to the peak performance, measured under laboratory conditions, namely:
  • on a base made of structural steel, perfectly concentrating the magnetic flux
  • whose transverse dimension reaches at least 10 mm
  • with an ground touching surface
  • without the slightest insulating layer between the magnet and steel
  • under perpendicular application of breakaway force (90-degree angle)
  • in neutral thermal conditions

Practical lifting capacity: influencing factors

In real-world applications, the actual holding force depends on several key aspects, listed from most significant:
  • Distance – existence of any layer (rust, dirt, air) acts as an insulator, which lowers power rapidly (even by 50% at 0.5 mm).
  • Angle of force application – maximum parameter is obtained only during pulling at a 90° angle. The force required to slide of the magnet along the plate is usually several times smaller (approx. 1/5 of the lifting capacity).
  • Substrate thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
  • Steel grade – the best choice is pure iron steel. Stainless steels may have worse magnetic properties.
  • Plate texture – ground elements guarantee perfect abutment, which improves force. Rough surfaces reduce efficiency.
  • Temperature influence – high temperature reduces magnetic field. Too high temperature can permanently damage the magnet.

Lifting capacity was determined with the use of a polished steel plate of suitable thickness (min. 20 mm), under vertically applied force, however under shearing force the holding force is lower. Moreover, even a slight gap between the magnet and the plate lowers the lifting capacity.

Safe handling of neodymium magnets
Fire risk

Combustion risk: Neodymium dust is explosive. Do not process magnets without safety gear as this risks ignition.

Handling guide

Before starting, check safety instructions. Uncontrolled attraction can destroy the magnet or injure your hand. Be predictive.

Bone fractures

Risk of injury: The pulling power is so great that it can result in hematomas, pinching, and broken bones. Protective gloves are recommended.

No play value

Absolutely keep magnets away from children. Choking hazard is high, and the consequences of magnets clamping inside the body are life-threatening.

Heat sensitivity

Avoid heat. Neodymium magnets are sensitive to heat. If you need operation above 80°C, look for special high-temperature series (H, SH, UH).

Life threat

People with a heart stimulator must maintain an safe separation from magnets. The magnetism can interfere with the functioning of the implant.

Keep away from electronics

A powerful magnetic field negatively affects the operation of compasses in smartphones and navigation systems. Keep magnets near a smartphone to avoid damaging the sensors.

Nickel coating and allergies

Some people experience a sensitization to nickel, which is the typical protective layer for NdFeB magnets. Frequent touching might lead to skin redness. We recommend use protective gloves.

Magnets are brittle

Despite the nickel coating, the material is delicate and not impact-resistant. Do not hit, as the magnet may crumble into sharp, dangerous pieces.

Threat to electronics

Avoid bringing magnets near a purse, computer, or TV. The magnetic field can destroy these devices and erase data from cards.

Security! Want to know more? Check our post: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98