e-mail: bok@dhit.pl

neodymium magnets

We offer yellow color magnetic Nd2Fe14B - our store's offer. All magnesy neodymowe in our store are in stock for immediate delivery (check the list). See the magnet pricing for more details check the magnet price list

Magnet for water searching F200 GOLD

Where to buy powerful magnet? Magnetic holders in solid and airtight steel enclosure are perfect for use in difficult, demanding climate conditions, including in the rain and snow more information...

magnets with holders

Holders with magnets can be used to facilitate production processes, underwater discoveries, or finding meteorites from gold see...

We promise to ship ordered magnets on the day of purchase before 2:00 PM on working days.

Dhit sp. z o.o. logo
Product available shipping tomorrow

UMGGW 34x8 [M4] GW / N38 - magnetic holder rubber internal thread

magnetic holder rubber internal thread

Catalog no 160306

GTIN: 5906301813644

5

Diameter Ø [±0,1 mm]

34 mm

Height [±0,1 mm]

8 mm

Weight

22 g

Load capacity

7.7 kg / 75.51 N

9.84 with VAT / pcs + price for transport

8.00 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs
8.00 ZŁ
9.84 ZŁ
price from 50 pcs
7.52 ZŁ
9.25 ZŁ
price from 100 pcs
7.04 ZŁ
8.66 ZŁ

Not sure which magnet to buy?

Call us now +48 22 499 98 98 alternatively get in touch using request form our website.
Weight and structure of magnetic components can be calculated with our power calculator.

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

UMGGW 34x8 [M4] GW / N38 - magnetic holder rubber internal thread

Specification/characteristics UMGGW 34x8 [M4] GW / N38 - magnetic holder rubber internal thread
properties
values
Cat. no.
160306
GTIN
5906301813644
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
34 mm [±0,1 mm]
Height
8 mm [±0,1 mm]
Weight
22 g [±0,1 mm]
Load capacity ~ ?
7.7 kg / 75.51 N
Manufacturing Tolerance
± 0.1 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 NdFeB

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

The built-in thread allows for easy attachment of bolts or other mounting accessories, making them universal, for example, in attaching plates, tools, or markings. The rubber coating prevents scratching, which is relevant for delicate materials, such as painted car bodies or glass panels.
No! Magnetic holders should not be used for people with implanted cardiac devices, as the strong magnetic field could disrupt their function. In such cases, we advise using alternative fastening methods — we offer two such types in our range.

Advantages and disadvantages of neodymium magnets NdFeB.

Apart from their consistent magnetic energy, neodymium magnets have these key benefits:

  • They have unchanged lifting capacity, and over nearly 10 years their attraction force decreases symbolically – ~1% (according to theory),
  • They are highly resistant to demagnetization caused by external magnetic fields,
  • Because of the lustrous layer of nickel, the component looks aesthetically refined,
  • Magnetic induction on the surface of these magnets is very strong,
  • With the right combination of magnetic alloys, they reach excellent thermal stability, enabling operation at or above 230°C (depending on the structure),
  • The ability for precise shaping or adjustment to specific needs – neodymium magnets can be manufactured in multiple variants of geometries, which extends the scope of their use cases,
  • Wide application in new technology industries – they find application in hard drives, electric drives, medical equipment along with high-tech tools,
  • Relatively small size with high magnetic force – neodymium magnets offer intense magnetic field in small dimensions, which makes them useful in miniature devices

Disadvantages of neodymium magnets:

  • They are fragile when subjected to a powerful impact. If the magnets are exposed to shocks, we recommend in a protective enclosure. The steel housing, in the form of a holder, protects the magnet from breakage , and at the same time enhances its overall robustness,
  • They lose field intensity at high temperatures. Most neodymium magnets experience permanent loss in strength when heated above 80°C (depending on the form and height). However, we offer special variants with high temperature resistance that can operate up to 230°C or higher,
  • They rust in a moist environment. For outdoor use, we recommend using moisture-resistant magnets, such as those made of polymer,
  • The use of a protective casing or external holder is recommended, since machining threads in neodymium magnets is difficult,
  • Possible threat due to small fragments may arise, when consumed by mistake, which is significant in the protection of children. It should also be noted that miniature parts from these devices may hinder health screening once in the system,
  • In cases of tight budgets, neodymium magnet cost is a challenge,

Magnetic strength at its maximum – what it depends on?

The given holding capacity of the magnet corresponds to the highest holding force, measured in the best circumstances, specifically:

  • with mild steel, used as a magnetic flux conductor
  • with a thickness of minimum 10 mm
  • with a polished side
  • in conditions of no clearance
  • under perpendicular detachment force
  • at room temperature

Lifting capacity in practice – influencing factors

The lifting capacity of a magnet depends on in practice the following factors, from primary to secondary:

  • Air gap between the magnet and the plate, because even a very small distance (e.g. 0.5 mm) causes a drop in lifting force of up to 50%.
  • Direction of applied force, because the maximum lifting capacity is achieved under perpendicular application. The force required to slide the magnet along the plate is usually several times lower.
  • Thickness of the plate, as a plate that is too thin causes part of the magnetic flux not to be used and to remain wasted in the air.
  • Material of the plate, because higher carbon content lowers holding force, while higher iron content increases it. The best choice is steel with high magnetic permeability and high saturation induction.
  • Surface of the plate, because the more smooth and polished it is, the better the contact and consequently the greater the magnetic saturation.
  • Operating temperature, since all permanent magnets have a negative temperature coefficient. This means that at high temperatures they are weaker, while at sub-zero temperatures they become slightly stronger.

* Lifting capacity was measured using a polished steel plate of suitable thickness (min. 20 mm), under vertically applied force, whereas under attempts to slide the magnet the holding force is lower. Moreover, even a minimal clearance {between} the magnet and the plate reduces the holding force.

Exercise Caution with Neodymium Magnets

Neodymium magnets are the most powerful magnets ever invented. Their strength can shock you.

Please review the information on how to handle neodymium magnets and avoid significant harm to your body, as well as prevent unintentional disruption to the magnets.

Magnets made of neodymium are highly delicate, they easily break and can crumble.

Neodymium magnetic are highly fragile, and by joining them in an uncontrolled manner, they will crack. Magnets made of neodymium are made of metal and coated with a shiny nickel, but they are not as durable as steel. At the moment of collision between the magnets, sharp metal fragments can be dispersed in different directions.

The magnet coating is made of nickel, so be cautious if you have an allergy.

Studies show a small percentage of people have allergies to certain metals, including nickel. An allergic reaction often manifests as skin redness and rash. If you have a nickel allergy, try wearing gloves or avoid direct contact with nickel-plated neodymium magnets.

Never bring neodymium magnets close to a phone and GPS.

Intense magnetic fields generated by neodymium magnets interfere with compasses and magnetometers used in navigation, as well as internal compasses of smartphones and GPS devices.

Under no circumstances should neodymium magnets be placed near a computer HDD, TV, and wallet.

Neodymium magnets generate intense magnetic fields that can destroy magnetic media such as floppy disks, video tapes, HDDs, credit cards, magnetic ID cards, cassette tapes, or other devices. They can also destroy devices like video players, televisions, CRT computer monitors. Do not forget to keep neodymium magnets away from these electronic devices.

Neodymium magnets are primarily characterized by their significant internal force. They attract to each other, and any object that comes in their way will be affected.

Neodymium magnets bounce and touch each other mutually within a distance of several to around 10 cm from each other.

 Maintain neodymium magnets far from children.

Not all neodymium magnets are toys, so do not let children play with them. In such a situation, surgery is necessary to remove them. In the worst case scenario, it can result in death.

People with pacemakers are advised to avoid neodymium magnets.

Neodymium magnets generate very strong magnetic fields that can interfere with the operation of a pacemaker. This happens because such devices have a function to deactivate them in a magnetic field.

Dust and powder from neodymium magnets are flammable.

Avoid drilling or mechanical processing of neodymium magnets. If the magnet is crushed into fine powder or dust, it becomes highly flammable.

Neodymium magnets can become demagnetized at high temperatures.

Although magnets have shown to retain their effectiveness up to 80°C or 175°F, this temperature may vary depending on the type of material, shape, and intended use of the magnet.

Warning!

So you are aware of why neodymium magnets are so dangerous, see the article titled How dangerous are powerful neodymium magnets?.

Dhit sp. z o.o. logo

e-mail: bok@dhit.pl

tel: +48 888 99 98 98