tel: +48 888 99 98 98

neodymium magnets

We provide red color magnetic Nd2Fe14B - our proposal. Practically all magnesy neodymowe on our website are available for immediate purchase (see the list). See the magnet price list for more details check the magnet price list

Magnet for fishing F300 GOLD

Where to buy very strong neodymium magnet? Holders with magnets in solid and airtight steel casing are excellent for use in difficult weather, including snow and rain more

magnets with holders

Holders with magnets can be used to improve production processes, underwater exploration, or locating meteors from gold check...

Enjoy shipping of your order on the same day by 2:00 PM on business days.

Dhit sp. z o.o.
Product available Ships tomorrow

UMH 20x7x35 [M4] / N38 - magnetic holder with hook

magnetic holder with hook

Catalog no 310425

GTIN: 5906301814542

5.00

Diameter Ø

20 mm [±1 mm]

Height

35 mm [±1 mm]

Height

7 mm [±1 mm]

Weight

21 g

Magnetization Direction

↑ axial

Load capacity

14.50 kg / 142.20 N

Coating

[NiCuNi] Nickel

8.59 with VAT / pcs + price for transport

6.98 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs
6.98 ZŁ
8.59 ZŁ
price from 100 pcs
6.56 ZŁ
8.07 ZŁ
price from 150 pcs
6.14 ZŁ
7.56 ZŁ

Want to negotiate?

Call us now +48 888 99 98 98 otherwise send us a note via inquiry form the contact section.
Weight along with form of a magnet can be verified with our modular calculator.

Order by 14:00 and we’ll ship today!

UMH 20x7x35 [M4] / N38 - magnetic holder with hook

Specification / characteristics UMH 20x7x35 [M4] / N38 - magnetic holder with hook

properties
properties values
Cat. no. 310425
GTIN 5906301814542
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 20 mm [±1 mm]
Height 35 mm [±1 mm]
Height 7 mm [±1 mm]
Weight 21 g
Magnetization Direction ↑ axial
Load capacity ~ ? 14.50 kg / 142.20 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMH 20x7x35 [M4] / N38 - magnetic holder with hook
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

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

View more products

They serve to create mobile suspension points without the need to drill holes in beams. You can use them to organize wires, hang tools, or clothes on metal racks.
The tip is fully demountable - you can unscrew the hook and screw in a bolt, eyelet, or other element in its place. Check the thread size in the product specification to select matching replacements.
You will get the greatest force by mounting the magnet on a thick, smooth steel surface vertically. If you hang the magnet on a wall, the real capacity is approx. 20-30% of the nominal value.
Thanks to the metal cover, attraction force is concentrated, which significantly increases capacity compared to a bare magnet. The housing ensures mechanical durability, which is important in industrial and assembly conditions.
Standard holders are coated with a layer of nickel or zinc, which protects them from corrosion indoors. Metal elements can rust with constant contact with atmospheric moisture.

Advantages as well as disadvantages of rare earth magnets.

In addition to their magnetic capacity, neodymium magnets provide the following advantages:

  • They virtually do not lose power, because even after ten years the performance loss is only ~1% (based on calculations),
  • They are extremely resistant to demagnetization induced by external field influence,
  • Thanks to the shimmering finish, the layer of Ni-Cu-Ni, gold-plated, or silver-plated gives an aesthetic appearance,
  • Neodymium magnets create maximum magnetic induction on a small area, which allows for strong attraction,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Thanks to versatility in constructing and the capacity to adapt to unusual requirements,
  • Fundamental importance in electronics industry – they find application in magnetic memories, brushless drives, medical equipment, also multitasking production systems.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which makes them useful in small systems

What to avoid - cons of neodymium magnets: application proposals

  • To avoid cracks under impact, we recommend using special steel housings. Such a solution protects the magnet and simultaneously increases its durability.
  • Neodymium magnets decrease 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 while using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • Limited ability of producing threads in the magnet and complex shapes - preferred is casing - magnetic holder.
  • Potential hazard resulting from small fragments of magnets can be dangerous, in case of ingestion, which gains importance in the context of child safety. Additionally, small elements of these devices can be problematic in diagnostics medical when they are in the body.
  • Due to expensive raw materials, their price exceeds standard values,

Maximum lifting force for a neodymium magnet – what it depends on?

Information about lifting capacity was defined for optimal configuration, assuming:

  • using a base made of mild steel, serving as a circuit closing element
  • with a cross-section of at least 10 mm
  • with a surface free of scratches
  • with zero gap (no coatings)
  • for force applied at a right angle (in the magnet axis)
  • at temperature approx. 20 degrees Celsius

Impact of factors on magnetic holding capacity in practice

During everyday use, the real power is determined by several key aspects, presented from crucial:

  • Gap between surfaces – every millimeter of distance (caused e.g. by veneer or unevenness) diminishes the pulling force, often by half at just 0.5 mm.
  • Pull-off angle – remember that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the nominal value.
  • Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of converting into lifting capacity.
  • Material composition – different alloys reacts the same. Alloy additives worsen the interaction with the magnet.
  • Surface structure – the smoother and more polished the surface, the better the adhesion and stronger the hold. Unevenness acts like micro-gaps.
  • Operating temperature – neodymium magnets have a negative temperature coefficient. At higher temperatures they lose power, and in frost gain strength (up to a certain limit).

* Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under shearing force the holding force is lower. Moreover, even a slight gap {between} the magnet’s surface and the plate lowers the lifting capacity.

Safety rules for work with NdFeB magnets

GPS Danger

Remember: neodymium magnets generate a field that confuses sensitive sensors. Maintain a safe distance from your mobile, tablet, and GPS.

Nickel allergy

A percentage of the population suffer from a contact allergy to nickel, which is the standard coating for NdFeB magnets. Prolonged contact might lead to an allergic reaction. We strongly advise wear protective gloves.

Product not for children

Neodymium magnets are not toys. Eating several magnets may result in them pinching intestinal walls, which poses a direct threat to life and necessitates immediate surgery.

Magnets are brittle

Beware of splinters. Magnets can explode upon violent connection, launching sharp fragments into the air. Eye protection is mandatory.

Medical implants

People with a pacemaker must keep an safe separation from magnets. The magnetic field can disrupt the operation of the life-saving device.

Conscious usage

Exercise caution. Rare earth magnets act from a distance and connect with massive power, often faster than you can react.

Power loss in heat

Standard neodymium magnets (N-type) lose power when the temperature goes above 80°C. Damage is permanent.

Threat to electronics

Intense magnetic fields can corrupt files on credit cards, hard drives, and storage devices. Keep a distance of min. 10 cm.

Do not drill into magnets

Fire hazard: Rare earth powder is explosive. Do not process magnets without safety gear as this risks ignition.

Serious injuries

Big blocks can crush fingers instantly. Do not place your hand between two attracting surfaces.

Warning!

Details about risks in the article: Magnet Safety Guide.

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98