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neodymium magnets

We provide red color magnetic Nd2Fe14B - our offer. Practically all "neodymium magnets" in our store are in stock for immediate purchase (see the list). See the magnet pricing for more details check the magnet price list

Magnet for water searching F400 GOLD

Where to buy very strong neodymium magnet? Magnet holders in airtight and durable steel enclosure are excellent for use in difficult, demanding weather, including during rain and snow see

magnetic holders

Magnetic holders can be applied to facilitate production, underwater exploration, or locating meteors made of ore see...

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Dhit sp. z o.o.
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HH 16x5.3 [M3] / N38 - through hole magnetic holder

through hole magnetic holder

Catalog no 370480

GTIN: 5906301814900

5

Diameter Ø

16 mm [±1 mm]

Height

5.3 mm [±1 mm]

Weight

6.4 g

Magnetization Direction

↑ axial

Load capacity

4 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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HH 16x5.3 [M3] / N38 - through hole magnetic holder
Specification/characteristics HH 16x5.3 [M3] / N38 - through hole magnetic holder
properties
values
Cat. no.
370480
GTIN
5906301814900
Production/Distribution
Dhit sp. z o.o.
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 kg / 39.23 N
Coating
[NiCuNi] nickel
Manufacturing Tolerance
±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
T
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 106
°C-1
Thermal expansion perpendicular (⊥) to orientation (M)
-(1-3) x 10-6
°C-1
Young's modulus
1.7 x 104
kg/mm²

Shopping tips

Unlike the countersunk version, the hole can be straight (for a cylindrical head screw) or with a recess (depending on the model). It is a more durable and stronger solution than a bare magnetic ring.
The magnet inside is brittle, so we advise against using impact drivers. Select a screw of appropriate diameter and head shape (cylindrical or conical, depending on model).
Thanks to this, the through-hole holder has much greater lifting capacity than the magnet alone of these dimensions. This force is available with direct contact with metal.
They are commonly used in carpentry as strong furniture latches. Can be used to build jigs in the workshop or mount lighting.
The product is intended mainly for use in dry rooms. With constant contact with water or in rain, corrosion may appear on the housing.

Pros and cons of neodymium magnets.

Besides their magnetic performance, neodymium magnets are valued for these benefits:

  • They do not lose strength, even after around ten years – the decrease in lifting capacity is only ~1% (according to tests),
  • They do not lose their magnetic properties even under external field action,
  • By applying a lustrous layer of gold, the element has an proper look,
  • They show high magnetic induction at the operating surface, making them more effective,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Thanks to freedom in shaping and the ability to customize to unusual requirements,
  • Huge importance in innovative solutions – they are utilized in magnetic memories, electromotive mechanisms, medical equipment, and technologically advanced constructions.
  • Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,

Cons of neodymium magnets and ways of using them

  • They are fragile upon too strong impacts. To avoid cracks, it is worth securing magnets in special housings. Such protection not only shields the magnet but also improves its resistance to damage
  • Neodymium magnets lose their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • Magnets exposed to a humid environment can rust. Therefore during using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • Limited possibility of creating nuts in the magnet and complex shapes - preferred is casing - magnet mounting.
  • Health risk related to microscopic parts of magnets are risky, when accidentally swallowed, which gains importance in the context of child health protection. Furthermore, small elements of these devices can complicate diagnosis medical after entering the body.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which hinders application in large quantities

Optimal lifting capacity of a neodymium magnetwhat affects it?

The lifting capacity listed is a theoretical maximum value conducted under specific, ideal conditions:

  • on a plate made of mild steel, optimally conducting the magnetic field
  • possessing a thickness of at least 10 mm to avoid saturation
  • with an ground contact surface
  • with zero gap (without paint)
  • for force applied at a right angle (pull-off, not shear)
  • at temperature approx. 20 degrees Celsius

Magnet lifting force in use – key factors

Please note that the magnet holding will differ subject to the following factors, starting with the most relevant:

  • Distance (between the magnet and the plate), as even a microscopic distance (e.g. 0.5 mm) results in a decrease in lifting capacity by up to 50% (this also applies to paint, corrosion or dirt).
  • Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the nominal value.
  • Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
  • Material type – the best choice is pure iron steel. Cast iron may attract less.
  • Smoothness – ideal contact is obtained only on smooth steel. Rough texture create air cushions, weakening the magnet.
  • Thermal environment – temperature increase results in weakening of induction. Check the thermal limit for a given model.

* Holding force was checked on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, in contrast under parallel forces the lifting capacity is smaller. Additionally, even a minimal clearance {between} the magnet’s surface and the plate reduces the load capacity.

H&S for magnets

Material brittleness

Despite metallic appearance, the material is delicate and not impact-resistant. Do not hit, as the magnet may shatter into hazardous fragments.

Crushing force

Mind your fingers. Two large magnets will join instantly with a force of several hundred kilograms, crushing anything in their path. Exercise extreme caution!

Respect the power

Exercise caution. Rare earth magnets act from a long distance and connect with massive power, often quicker than you can move away.

Allergy Warning

Medical facts indicate that the nickel plating (standard magnet coating) is a potent allergen. If your skin reacts to metals, avoid touching magnets with bare hands and select coated magnets.

Compass and GPS

Be aware: neodymium magnets produce a field that confuses precision electronics. Keep a safe distance from your mobile, tablet, and GPS.

Data carriers

Do not bring magnets close to a wallet, computer, or screen. The magnetic field can destroy these devices and wipe information from cards.

Adults only

Product intended for adults. Small elements can be swallowed, causing intestinal necrosis. Keep away from children and animals.

Medical implants

People with a heart stimulator have to maintain an safe separation from magnets. The magnetism can stop the operation of the implant.

Fire warning

Dust generated during cutting of magnets is self-igniting. Do not drill into magnets without proper cooling and knowledge.

Power loss in heat

Control the heat. Exposing the magnet to high heat will ruin its magnetic structure and strength.

Danger!

Learn more about risks in the article: Magnet Safety Guide.

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98