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neodymium magnets

We provide blue color magnetic Nd2Fe14B - our proposal. Practically all "magnets" on our website are in stock for immediate purchase (see the list). Check out the magnet pricing for more details check the magnet price list

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

magnetic holder internal thread

Catalog no 180319

GTIN: 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 with VAT / pcs + price for transport

19.50 ZŁ net + 23% VAT / pcs

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Weight as well as structure of neodymium magnets can be tested on our power 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 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 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
Magnet Unit Converter
Force (Pull)

Magnetic Induction

Other products

A magnetic holder (magnet in a steel cup) is much stronger on one side than a bare magnet of the same dimensions. 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. Neodymium magnets are brittle, and direct pressure from a screw can cause them to crack or detach. You can use a spacer washer or lock nut to limit screwing depth.
They are used for fixing sensors, lamps, rating plates, machine guards, and installations. They allow mounting without drilling in steel substrate, which is crucial in rented spaces. In the workshop, they can serve as mounting points for tools or measuring instruments.
This value applies to perfect adherence with the entire magnet surface. Air gap (rust, paint, dirt) also drastically lowers holding power. We always recommend choosing a magnet with power reserve, especially if the surface is not ideal.
Standard coating effectively protects against moisture in indoor conditions. In rain and frost, the coating may degrade over time if not protected. The whole is well protected for standard workshop and industrial applications.

Advantages as well as disadvantages of Nd2Fe14B magnets.

Strengths
Apart from their consistent power, neodymium magnets have these key benefits:
  • They retain magnetic properties for almost ten years – the loss is just ~1% (based on simulations),
  • They have excellent resistance to magnetism drop when exposed to external fields,
  • In other words, due to the shiny surface of nickel, the element gains a professional look,
  • Magnetic induction on the working part of the magnet turns out to be strong,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
  • Possibility of exact forming and adapting to individual conditions,
  • Versatile presence in innovative solutions – they serve a role in computer drives, electric motors, precision medical tools, and complex engineering applications.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which allows their use in miniature devices
Cons
Drawbacks and weaknesses of neodymium magnets and ways of using them
  • They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets in special housings. Such protection not only shields the magnet but also increases its resistance to damage
  • When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • They oxidize in a humid environment. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in realizing threads and complex forms in magnets, we propose using a housing - magnetic holder.
  • Potential hazard resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child health protection. Additionally, small components of these devices are able to disrupt the diagnostic process medical in case of swallowing.
  • Due to neodymium price, their price is higher than average,

Pull force analysis

Best holding force of the magnet in ideal parameterswhat contributes to it?
Holding force of 40.00 kg is a theoretical maximum value performed under specific, ideal conditions:
  • using a base made of low-carbon steel, acting as a circuit closing element
  • possessing a thickness of at least 10 mm to avoid saturation
  • with an polished touching surface
  • without the slightest clearance between the magnet and steel
  • during detachment in a direction perpendicular to the mounting surface
  • in neutral thermal conditions
Key elements affecting lifting force
In real-world applications, the actual lifting capacity depends on a number of factors, presented from most significant:
  • Clearance – the presence of any layer (rust, tape, gap) interrupts the magnetic circuit, which reduces power steeply (even by 50% at 0.5 mm).
  • Force direction – note that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the maximum value.
  • Substrate thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal limits the attraction force (the magnet "punches through" it).
  • Steel type – mild steel attracts best. Alloy steels lower magnetic permeability and lifting capacity.
  • Smoothness – full contact is obtained only on polished steel. Rough texture reduce the real contact area, weakening the magnet.
  • Operating temperature – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and at low temperatures gain strength (up to a certain limit).

Lifting capacity was determined using a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular pulling force, however under shearing force the holding force is lower. Additionally, even a minimal clearance between the magnet and the plate reduces the load capacity.

Safe handling of neodymium magnets
Material brittleness

Protect your eyes. Magnets can explode upon uncontrolled impact, ejecting sharp fragments into the air. Eye protection is mandatory.

Avoid contact if allergic

Warning for allergy sufferers: The Ni-Cu-Ni coating contains nickel. If skin irritation occurs, cease working with magnets and wear gloves.

Pacemakers

People with a pacemaker should keep an large gap from magnets. The magnetism can interfere with the functioning of the life-saving device.

Electronic devices

Equipment safety: Strong magnets can ruin data carriers and sensitive devices (heart implants, hearing aids, mechanical watches).

Machining danger

Dust produced during grinding of magnets is combustible. Do not drill into magnets without proper cooling and knowledge.

This is not a toy

Product intended for adults. Tiny parts can be swallowed, causing severe trauma. Store away from children and animals.

Bone fractures

Big blocks can crush fingers in a fraction of a second. Never put your hand between two strong magnets.

Power loss in heat

Avoid heat. Neodymium magnets are sensitive to heat. If you require operation above 80°C, look for special high-temperature series (H, SH, UH).

GPS and phone interference

A powerful magnetic field disrupts the operation of magnetometers in phones and GPS navigation. Keep magnets close to a device to avoid damaging the sensors.

Conscious usage

Use magnets with awareness. Their huge power can surprise even professionals. Plan your moves and respect their force.

Safety First! Looking for details? Check our post: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98