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HH 16x5.3 [M3] / N38 - through hole magnetic holder

through hole magnetic holder

Catalog no 370480

GTIN/EAN: 5906301814900

5.00

Diameter Ø

16 mm [±1 mm]

Height

5.3 mm [±1 mm]

Weight

6.4 g

Magnetization Direction

↑ axial

Load capacity

4.00 kg / 39.23 N

Coating

[NiCuNi] Nickel

3.32 with VAT / pcs + price for transport

2.70 ZŁ net + 23% VAT / pcs

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Lifting power along with form of a neodymium magnet can be analyzed with our online calculation tool.

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Technical of the product - HH 16x5.3 [M3] / N38 - through hole magnetic holder

Specification / characteristics - HH 16x5.3 [M3] / N38 - through hole magnetic holder

properties
properties values
Cat. no. 370480
GTIN/EAN 5906301814900
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 16 mm [±1 mm]
Height 5.3 mm [±1 mm]
Weight 6.4 g
Magnetization Direction ↑ axial
Load capacity ~ ? 4.00 kg / 39.23 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics HH 16x5.3 [M3] / N38 - through hole magnetic holder
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 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%
Ecology and recycling (GPSR)
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: 370480-2025
Magnet Unit Converter
Force (pull)

Magnetic Field

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This construction allows solid screwing of the magnet to the substrate using a bolt or rivet. The steel housing strengthens attraction force and protects the magnet from cracking.
The magnet inside is brittle, so we advise against using impact drivers. It is worth using a washer if the screw head is small to distribute pressure.
Model HH 16x5.3 [M3] / N38 has a holding force of approx. 4.00 kg on thick steel. Air gap, rust, or paint weaken the magnet's action.
They serve as a base for holding metal elements, e.g., doors, flaps, covers, or tools. Thanks to flat construction, they do not take up much space and are discreet.
This protection shields against moisture in indoor conditions but is not 100% waterproof. With constant contact with water or in rain, corrosion may appear on the housing.

Pros as well as cons of Nd2Fe14B magnets.

Benefits

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:
  • Their power remains stable, and after around 10 years it decreases only by ~1% (according to research),
  • They maintain their magnetic properties even under external field action,
  • In other words, due to the smooth layer of silver, the element gains a professional look,
  • They are known for high magnetic induction at the operating surface, which increases their power,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • Possibility of accurate machining as well as adapting to atypical conditions,
  • Versatile presence in modern industrial fields – they are used in HDD drives, electric motors, medical equipment, as well as modern systems.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Limitations

Cons of neodymium magnets: weaknesses and usage proposals
  • To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution protects the magnet and simultaneously improves its durability.
  • NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
  • They oxidize in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • Limited ability of making threads in the magnet and complicated forms - preferred is casing - magnet mounting.
  • Possible danger resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. It is also worth noting that tiny parts of these magnets are able to complicate diagnosis medical in case of swallowing.
  • With mass production the cost of neodymium magnets can be a barrier,

Holding force characteristics

Maximum lifting force for a neodymium magnet – what contributes to it?

The force parameter is a result of laboratory testing executed under standard conditions:
  • on a base made of mild steel, perfectly concentrating the magnetic flux
  • with a thickness minimum 10 mm
  • with an ideally smooth contact surface
  • with total lack of distance (without paint)
  • for force applied at a right angle (in the magnet axis)
  • at standard ambient temperature

Lifting capacity in real conditions – factors

Effective lifting capacity is affected by specific conditions, mainly (from most important):
  • Gap between surfaces – every millimeter of distance (caused e.g. by varnish or dirt) diminishes the magnet efficiency, often by half at just 0.5 mm.
  • Angle of force application – highest force is reached only during pulling at a 90° angle. The force required to slide of the magnet along the plate is typically several times lower (approx. 1/5 of the lifting capacity).
  • Steel thickness – insufficiently thick sheet causes magnetic saturation, causing part of the flux to be escaped into the air.
  • Steel grade – the best choice is pure iron steel. Hardened steels may generate lower lifting capacity.
  • Surface quality – the more even the plate, the larger the contact zone and higher the lifting capacity. Roughness acts like micro-gaps.
  • Thermal factor – high temperature weakens pulling force. Too high temperature can permanently demagnetize the magnet.

Lifting capacity testing was performed on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, however under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a small distance between the magnet and the plate decreases the lifting capacity.

Warnings
No play value

Product intended for adults. Tiny parts pose a choking risk, leading to serious injuries. Store out of reach of children and animals.

Medical interference

People with a pacemaker have to maintain an large gap from magnets. The magnetism can stop the operation of the implant.

Power loss in heat

Keep cool. Neodymium magnets are susceptible to temperature. If you need resistance above 80°C, look for HT versions (H, SH, UH).

Electronic devices

Powerful magnetic fields can destroy records on payment cards, hard drives, and other magnetic media. Maintain a gap of at least 10 cm.

Protective goggles

NdFeB magnets are ceramic materials, which means they are prone to chipping. Impact of two magnets will cause them shattering into small pieces.

GPS Danger

Navigation devices and smartphones are extremely susceptible to magnetic fields. Direct contact with a powerful NdFeB magnet can ruin the internal compass in your phone.

Immense force

Use magnets with awareness. Their immense force can shock even experienced users. Stay alert and do not underestimate their power.

Serious injuries

Danger of trauma: The pulling power is so immense that it can cause blood blisters, crushing, and even bone fractures. Protective gloves are recommended.

Avoid contact if allergic

Medical facts indicate that the nickel plating (standard magnet coating) is a common allergen. If you have an allergy, refrain from touching magnets with bare hands and opt for versions in plastic housing.

Machining danger

Fire hazard: Rare earth powder is explosive. Avoid machining magnets in home conditions as this may cause fire.

Safety First! Need more info? Read our article: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98