tel: +48 22 499 98 98

neodymium magnets

We offer yellow color magnets Nd2Fe14B - our offer. Practically all magnesy neodymowe on our website are available for immediate purchase (check the list). See the magnet price list for more details check the magnet price list

Magnet for water searching F400 GOLD

Where to buy very strong magnet? Magnet holders in airtight, solid steel enclosure are perfect for use in challenging climate conditions, including snow and rain more information

magnetic holders

Holders with magnets can be used to improve manufacturing, underwater exploration, or finding meteors made of ore more information...

We promise to ship ordered magnets on the same day by 2:00 PM on business days.

Dhit sp. z o.o.
Product available Ships today (order by 14:00)

UMGZ 20x15x7 [M4] GZ / N38 - magnetic holder external thread

magnetic holder external thread

Catalog no 190322

GTIN: 5906301813811

5

Diameter Ø

20 mm [±1 mm]

Height

15 mm [±1 mm]

Height

7 mm [±1 mm]

Weight

14 g

Load capacity

9 kg / 88.26 N

7.22 with VAT / pcs + price for transport

5.87 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs
5.87 ZŁ
7.22 ZŁ
price from 100 pcs
5.52 ZŁ
6.79 ZŁ
price from 150 pcs
5.17 ZŁ
6.35 ZŁ

Not sure about your choice?

Call us now +48 888 99 98 98 alternatively get in touch by means of contact form our website.
Strength and shape of magnetic components can be verified on our our magnetic calculator.

Orders placed before 14:00 will be shipped the same business day.

UMGZ 20x15x7 [M4] GZ / N38 - magnetic holder external thread
Specification/characteristics UMGZ 20x15x7 [M4] GZ / N38 - magnetic holder external thread
properties
values
Cat. no.
190322
GTIN
5906301813811
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
20 mm [±1 mm]
Height
15 mm [±1 mm]
Height
7 mm [±1 mm]
Weight
14 g
Load capacity ~ ?
9 kg / 88.26 N
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

A magnet with a built-in screw is great for screwing with a nut to housings, profiles, and flat bars. Just pass the thread through the hole in the element and tighten the nut on the other side. Used for mounting sensors, panels, plates, and exhibition elements.
Too strong tightening with a wrench can cause the stud to rotate in the cup or strip the thread. Do not use the magnet as a structural bolt transferring huge mechanical loads in shear. The magnet itself is protected by a steel cup and is very resistant to impact.
Maximum operating temperature is 80 degrees Celsius for the standard version. If you need resistance to higher temperatures, ask about special versions (H, SH). Remember that even momentary overheating can weaken the holder.
Holders are equipped with standard metric threads (e.g., M4, M6, M8, M10). Stud length varies depending on the model (usually from 8 to 15 mm). It is a solid threaded connection, ready for use.
Thanks to shielding the sides and top, all magnet power is directed downwards, giving higher capacity than a bare magnet. It is a solution optimized for strong holding with direct contact, not attracting from afar.

Pros as well as cons of rare earth magnets.

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

  • They retain full power for around ten years – the loss is just ~1% (based on simulations),
  • They possess excellent resistance to magnetic field loss when exposed to external fields,
  • Thanks to the shiny finish, the plating of nickel, gold-plated, or silver-plated gives an visually attractive appearance,
  • The surface of neodymium magnets generates a intense magnetic field – this is a key feature,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Thanks to versatility in constructing and the capacity to adapt to client solutions,
  • Huge importance in innovative solutions – they are commonly used in computer drives, drive modules, advanced medical instruments, and technologically advanced constructions.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which enables their usage in compact constructions

What to avoid - cons of neodymium magnets: weaknesses and usage proposals

  • At very strong impacts they can crack, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
  • We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
  • Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • Limited ability of making threads in the magnet and complex forms - recommended is cover - mounting mechanism.
  • Potential hazard resulting from small fragments of magnets pose a threat, in case of ingestion, which gains importance in the aspect of protecting the youngest. Furthermore, small elements of these magnets are able to complicate diagnosis medical when they are in the body.
  • With large orders the cost of neodymium magnets is a challenge,

Maximum lifting capacity of the magnetwhat affects it?

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

  • with the application of a sheet made of low-carbon steel, ensuring maximum field concentration
  • with a cross-section no less than 10 mm
  • with a plane cleaned and smooth
  • with zero gap (without paint)
  • for force applied at a right angle (pull-off, not shear)
  • in stable room temperature

Determinants of practical lifting force of a magnet

In practice, the real power is determined by a number of factors, ranked from most significant:

  • Clearance – existence of foreign body (rust, tape, gap) interrupts the magnetic circuit, which lowers capacity steeply (even by 50% at 0.5 mm).
  • Force direction – remember that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the nominal value.
  • Steel thickness – insufficiently thick steel does not accept the full field, causing part of the power to be lost to the other side.
  • Plate material – mild steel gives the best results. Higher carbon content lower magnetic properties and lifting capacity.
  • Surface quality – the smoother and more polished the surface, the better the adhesion and higher the lifting capacity. Unevenness creates an air distance.
  • Operating temperature – NdFeB sinters have a sensitivity to temperature. At higher temperatures they lose power, and in frost gain strength (up to a certain limit).

* Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under shearing force the holding force is lower. Moreover, even a small distance {between} the magnet’s surface and the plate reduces the holding force.

Safe handling of NdFeB magnets

GPS and phone interference

GPS units and smartphones are highly susceptible to magnetism. Close proximity with a powerful NdFeB magnet can decalibrate the sensors in your phone.

Safe operation

Handle with care. Rare earth magnets attract from a long distance and snap with huge force, often faster than you can react.

Flammability

Drilling and cutting of NdFeB material poses a fire risk. Neodymium dust reacts violently with oxygen and is difficult to extinguish.

Keep away from children

Only for adults. Small elements can be swallowed, leading to severe trauma. Keep away from kids and pets.

Allergic reactions

Certain individuals have a sensitization to nickel, which is the standard coating for neodymium magnets. Extended handling may cause skin redness. We suggest wear safety gloves.

Protective goggles

NdFeB magnets are sintered ceramics, meaning they are prone to chipping. Impact of two magnets will cause them breaking into shards.

Life threat

Warning for patients: Powerful magnets affect electronics. Maintain at least 30 cm distance or ask another person to handle the magnets.

Physical harm

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

Electronic devices

Avoid bringing magnets close to a wallet, computer, or TV. The magnetic field can permanently damage these devices and wipe information from cards.

Do not overheat magnets

Control the heat. Exposing the magnet to high heat will destroy its properties and pulling force.

Warning!

Details about hazards in the article: Magnet Safety Guide.

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98