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neodymium magnets

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

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Where to purchase powerful neodymium magnet? Magnetic holders in airtight and durable enclosure are ideally suited for use in difficult, demanding weather, including in the rain and snow see

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Holders with magnets can be applied to improve production, underwater exploration, or finding meteorites made of metal see more...

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Product available Ships tomorrow

UMGW 36x18x8 [M8] GW / N38 - magnetic holder internal thread

magnetic holder internal thread

Catalog no 180319

GTIN/EAN: 5906301813750

5.00

Diameter Ø

36 mm [±1 mm]

Height

18 mm [±1 mm]

Height

8 mm [±1 mm]

Weight

52 g

Load capacity

40.00 kg / 392.27 N

23.99 ZŁ with VAT / pcs + price for transport

19.50 ZŁ net + 23% VAT / pcs

bulk discounts:

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Call us +48 22 499 98 98 alternatively drop us a message through our online form the contact page.
Weight along with appearance of a neodymium magnet can be verified with our magnetic mass calculator.

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UMGW 36x18x8 [M8] GW / N38 - magnetic holder internal thread

Specification / characteristics UMGW 36x18x8 [M8] GW / N38 - magnetic holder internal thread

properties
properties values
Cat. no. 180319
GTIN/EAN 5906301813750
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 36 mm [±1 mm]
Height 18 mm [±1 mm]
Height 8 mm [±1 mm]
Weight 52 g
Load capacity ~ ? 40.00 kg / 392.27 N
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMGW 36x18x8 [M8] GW / N38 - magnetic holder internal thread
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
Technical specification and ecology
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%
Environmental data
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: 180319-2025
Magnet Unit Converter
Force (Pull)
Magnetic Induction
Insert a number into a field, to see the rest convert on the fly.

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The steel cup acts as an armature, concentrating the magnetic flux and increasing capacity even several times. Moreover, the metal housing protects the brittle neodymium magnet from cracking upon impact. The bushing with internal thread allows easy screwing of any element (bolt, hook, handle).
Too long a screw can pass through the bushing and push out or damage the magnet glued into the bottom of the cup. If the screw reaches the bottom of the bushing and is further tightened forcefully, it will destroy the magnet. It is worth securing the thread with thread glue if the connection is to be durable and resistant to vibrations.
They are indispensable when building exhibition stands and shop displays (POS systems). They enable creating demountable connections that can be easily moved. In the workshop, they can serve as mounting points for tools or measuring instruments.
The stated force is the maximum laboratory value obtained on a clean, smooth sheet. With thin sheets (e.g., car body, fridge casing), the force will be much smaller because steel cannot absorb the entire magnetic field. For side detachment (sliding), the force is only approx. 1/3 of nominal capacity.
Steel cups are usually coated with a layer of nickel (shiny) or zinc (matte/bright), providing basic protection. In rain and frost, the coating may degrade over time if not protected. The whole is well protected for standard workshop and industrial applications.

Pros as well as cons of Nd2Fe14B magnets.

Pros
In addition to their pulling strength, neodymium magnets provide the following advantages:
  • They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (based on calculations),
  • They have excellent resistance to weakening of magnetic properties when exposed to external fields,
  • A magnet with a smooth gold surface looks better,
  • Neodymium magnets generate maximum magnetic induction on a small surface, which increases force concentration,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Thanks to versatility in forming and the ability to customize to unusual requirements,
  • Wide application in high-tech industry – they serve a role in hard drives, drive modules, precision medical tools, also industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which makes them useful in small systems
Disadvantages
Problematic aspects of neodymium magnets: application proposals
  • At very strong impacts they can crack, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's 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 stability even at temperatures up to 230°C
  • When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
  • Due to limitations in realizing nuts and complicated forms in magnets, we recommend using a housing - magnetic mechanism.
  • Potential hazard to health – tiny shards of magnets can be dangerous, in case of ingestion, which gains importance in the context of child health protection. Additionally, small components of these products are able to complicate diagnosis medical when they are in the body.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which can limit application in large quantities

Holding force characteristics

Optimal lifting capacity of a neodymium magnet – what affects it?
Holding force of 40.00 kg is a theoretical maximum value executed under specific, ideal conditions:
  • using a base made of mild steel, serving as a magnetic yoke
  • possessing a thickness of at least 10 mm to avoid saturation
  • characterized by smoothness
  • under conditions of gap-free contact (metal-to-metal)
  • for force acting at a right angle (pull-off, not shear)
  • at standard ambient temperature
Practical lifting capacity: influencing factors
In practice, the actual holding force is determined by several key aspects, presented from crucial:
  • Distance – existence of foreign body (paint, dirt, air) acts as an insulator, which lowers power rapidly (even by 50% at 0.5 mm).
  • Pull-off angle – note that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the maximum value.
  • Wall thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of converting into lifting capacity.
  • Material composition – not every steel attracts identically. Alloy additives worsen the interaction with the magnet.
  • Plate texture – ground elements ensure maximum contact, which increases force. Rough surfaces reduce efficiency.
  • Thermal conditions – NdFeB sinters have a negative temperature coefficient. When it is hot they lose power, and at low temperatures they can be stronger (up to a certain limit).

Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under perpendicular forces, whereas under attempts to slide the magnet the lifting capacity is smaller. In addition, even a slight gap between the magnet’s surface and the plate decreases the load capacity.

Safe handling of NdFeB magnets
Heat warning

Do not overheat. NdFeB magnets are susceptible to heat. If you need operation above 80°C, look for HT versions (H, SH, UH).

Mechanical processing

Mechanical processing of NdFeB material carries a risk of fire risk. Neodymium dust reacts violently with oxygen and is difficult to extinguish.

Magnet fragility

Neodymium magnets are sintered ceramics, which means they are prone to chipping. Clashing of two magnets will cause them cracking into shards.

Hand protection

Risk of injury: The pulling power is so great that it can result in blood blisters, pinching, and broken bones. Use thick gloves.

Danger to pacemakers

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

Keep away from electronics

An intense magnetic field interferes with the operation of compasses in phones and navigation systems. Keep magnets close to a device to avoid breaking the sensors.

Handling rules

Before starting, check safety instructions. Sudden snapping can break the magnet or injure your hand. Think ahead.

Cards and drives

Powerful magnetic fields can corrupt files on credit cards, HDDs, and other magnetic media. Maintain a gap of at least 10 cm.

Warning for allergy sufferers

Some people suffer from a contact allergy to Ni, which is the standard coating for neodymium magnets. Prolonged contact can result in a rash. We recommend wear protective gloves.

This is not a toy

These products are not intended for children. Accidental ingestion of multiple magnets may result in them connecting inside the digestive tract, which poses a critical condition and requires urgent medical intervention.

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