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neodymium magnets

We offer red color magnets Nd2Fe14B - our offer. All "neodymium magnets" on our website are in stock for immediate purchase (see the list). Check out the magnet price list for more details check the magnet price list

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UMGB 75x28 [M10x3] GW F200 PLATINIUM + Lina GOBLIN / N52 - goblin magnetic holder

goblin magnetic holder

Catalog no 350441

GTIN: 5906301814832

5

Diameter Ø

75 mm [±1 mm]

Height

28 mm [±1 mm]

Weight

900 g

Magnetization Direction

↑ axial

Load capacity

365 kg / 3579.43 N

Coating

[NiCuNi] nickel

280.00 with VAT / pcs + price for transport

227.64 ZŁ net + 23% VAT / pcs

bulk discounts:

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UMGB 75x28 [M10x3] GW F200 PLATINIUM + Lina GOBLIN / N52 - goblin magnetic holder
Specification/characteristics UMGB 75x28 [M10x3] GW F200 PLATINIUM + Lina GOBLIN / N52 - goblin magnetic holder
properties
values
Cat. no.
350441
GTIN
5906301814832
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
75 mm [±1 mm]
Height
28 mm [±1 mm]
Weight
900 g
Magnetization Direction
↑ axial
Load capacity ~ ?
365 kg / 3579.43 N
Coating
[NiCuNi] nickel
Manufacturing Tolerance
±1 mm

Magnetic properties of material N52

properties
values
units
remenance Br [Min. - Max.] ?
14.2-14.7
kGs
remenance Br [Min. - Max.] ?
1420-1470
T
coercivity bHc ?
10.8-12.5
kOe
coercivity bHc ?
860-995
kA/m
actual internal force iHc
≥ 12
kOe
actual internal force iHc
≥ 955
kA/m
energy density [Min. - Max.] ?
48-53
BH max MGOe
energy density [Min. - Max.] ?
380-422
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

Pros as well as cons of neodymium magnets.

Besides their immense pulling force, neodymium magnets offer the following advantages:

  • They have constant strength, and over around 10 years their attraction force decreases symbolically – ~1% (in testing),
  • Magnets effectively resist against loss of magnetization caused by external fields,
  • In other words, due to the smooth layer of gold, the element becomes visually attractive,
  • They are known for high magnetic induction at the operating surface, which increases their power,
  • 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 the option of precise forming and customization to individualized projects, neodymium magnets can be produced in a broad palette of geometric configurations, which increases their versatility,
  • Fundamental importance in modern industrial fields – they serve a role in mass storage devices, brushless drives, medical equipment, as well as modern systems.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which enables their usage in small systems

Cons of neodymium magnets and proposals for their use:

  • They are prone to damage upon too strong impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only shields the magnet but also increases its resistance to damage
  • We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
  • They rust in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in producing threads and complex forms in magnets, we recommend using casing - magnetic holder.
  • Possible danger resulting from small fragments of magnets pose a threat, if swallowed, which is particularly important in the aspect of protecting the youngest. Furthermore, small components of these devices can complicate diagnosis medical after entering the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Best holding force of the magnet in ideal parameterswhat it depends on?

Magnet power is the result of a measurement for ideal contact conditions, taking into account:

  • with the use of a yoke made of low-carbon steel, guaranteeing maximum field concentration
  • with a cross-section of at least 10 mm
  • characterized by smoothness
  • under conditions of no distance (surface-to-surface)
  • for force applied at a right angle (in the magnet axis)
  • at temperature room level

Practical lifting capacity: influencing factors

Effective lifting capacity impacted by specific conditions, including (from priority):

  • Gap (between the magnet and the metal), since even a very small distance (e.g. 0.5 mm) can cause a decrease in lifting capacity by up to 50% (this also applies to varnish, rust or debris).
  • Angle of force application – highest force is available only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is standardly many times lower (approx. 1/5 of the lifting capacity).
  • Steel thickness – insufficiently thick sheet does not accept the full field, causing part of the flux to be lost into the air.
  • Material type – the best choice is high-permeability steel. Stainless steels may have worse magnetic properties.
  • Base smoothness – the smoother and more polished the plate, the better the adhesion and higher the lifting capacity. Roughness creates an air distance.
  • Thermal factor – high temperature reduces magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

* Lifting capacity was measured by applying a polished steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, whereas under shearing force the holding force is lower. Moreover, even a slight gap {between} the magnet’s surface and the plate reduces the load capacity.

H&S for magnets

Heat sensitivity

Standard neodymium magnets (N-type) lose magnetization when the temperature exceeds 80°C. Damage is permanent.

Danger to pacemakers

Warning for patients: Strong magnetic fields disrupt electronics. Keep at least 30 cm distance or ask another person to handle the magnets.

No play value

Neodymium magnets are not suitable for play. Swallowing multiple magnets can lead to them attracting across intestines, which constitutes a critical condition and necessitates urgent medical intervention.

Combustion hazard

Mechanical processing of neodymium magnets carries a risk of fire risk. Neodymium dust oxidizes rapidly with oxygen and is difficult to extinguish.

Do not underestimate power

Handle magnets consciously. Their huge power can surprise even experienced users. Plan your moves and respect their force.

Bone fractures

Big blocks can smash fingers in a fraction of a second. Under no circumstances put your hand betwixt two attracting surfaces.

Allergy Warning

Certain individuals suffer from a hypersensitivity to Ni, which is the standard coating for NdFeB magnets. Extended handling might lead to a rash. It is best to use protective gloves.

Safe distance

Data protection: Strong magnets can damage data carriers and sensitive devices (heart implants, medical aids, timepieces).

Magnets are brittle

Despite the nickel coating, the material is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into hazardous fragments.

Compass and GPS

Be aware: rare earth magnets produce a field that confuses precision electronics. Keep a separation from your mobile, tablet, and navigation systems.

Safety First!

Details about hazards in the article: Safety of working with magnets.

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98