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neodymium magnets

We provide blue color magnets Nd2Fe14B - our store's offer. All magnesy neodymowe in our store 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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UMS 16x6.5x3.5x5 / N38 - conical magnetic holder

conical magnetic holder

Catalog no 220326

GTIN: 5906301814160

5

Diameter Ø [±0,1 mm]

16 mm

cone dimension Ø [±0,1 mm]

6.5x3.5 mm

Height [±0,1 mm]

5 mm

Weight

5.5 g

Magnetization Direction

↑ axial

Load capacity

5 kg / 49.03 N

Coating

[NiCuNi] nickel

4.48 with VAT / pcs + price for transport

3.64 ZŁ net + 23% VAT / pcs

bulk discounts:

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Force as well as appearance of neodymium magnets can be calculated using our magnetic mass calculator.

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UMS 16x6.5x3.5x5 / N38 - conical magnetic holder
Specification/characteristics UMS 16x6.5x3.5x5 / N38 - conical magnetic holder
properties
values
Cat. no.
220326
GTIN
5906301814160
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
16 mm [±0,1 mm]
cone dimension Ø
6.5x3.5 mm [±0,1 mm]
Height
5 mm [±0,1 mm]
Weight
5.5 g [±0,1 mm]
Magnetization Direction
↑ axial
Load capacity ~ ?
5 kg / 49.03 N
Coating
[NiCuNi] nickel
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 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

Countersunk magnets are indispensable in carpentry, furniture making, and modeling as hidden closures. The holder can be screwed directly to wood, wall, metal, or plastic. The steel cup strengthens the magnet force and protects it from cracking upon impact.
Remember that neodymium breaks easily if the screw is tightened too hard. Avoid forceful tightening when you feel resistance. Using too large a countersunk screw may cause the magnetic ring to crack.
For two magnets screwed with cones facing each other (faces) to attract, they must have different polarity. In our offer, we try to mark or pair holders if explicitly stated in the description. Mounting a magnet to a plate eliminates the problem of matching poles and is easier.
This force is measured in ideal laboratory conditions when pulling at a 90-degree angle. If the magnet hangs vertically, gravity causes it to slide with much less load. When selecting a magnet for a cabinet, remember that the air gap (e.g., bumpers, seals) weakens the grip.
The steel housing (cup/pot) acts as a magnetic shield, directing all power to the front of the holder. The housing absorbs impacts, preventing the magnet from crumbling and cracking. The countersunk holder is a professional mounting solution with increased durability.

Advantages and disadvantages of rare earth magnets.

In addition to their pulling strength, neodymium magnets provide the following advantages:

  • They have stable power, and over more than ten years their performance decreases symbolically – ~1% (in testing),
  • Magnets perfectly defend themselves against loss of magnetization caused by foreign field sources,
  • A magnet with a smooth nickel surface has an effective appearance,
  • The surface of neodymium magnets generates a powerful magnetic field – this is a key feature,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • Considering the ability of free forming and customization to unique solutions, NdFeB magnets can be created in a variety of shapes and sizes, which amplifies use scope,
  • Key role in modern industrial fields – they serve a role in computer drives, brushless drives, diagnostic systems, also industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which makes them useful in small systems

Disadvantages of neodymium magnets:

  • At strong impacts they can crack, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • When exposed to high temperature, neodymium magnets experience 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
  • Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
  • Limited possibility of making threads in the magnet and complex forms - recommended is cover - magnet mounting.
  • Health risk to health – tiny shards of magnets are risky, in case of ingestion, which gains importance in the context of child safety. Furthermore, tiny parts of these devices are able to disrupt the diagnostic process medical when they are in the body.
  • With mass production the cost of neodymium magnets is economically unviable,

Maximum holding power of the magnet – what contributes to it?

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

  • using a sheet made of high-permeability steel, acting as a ideal flux conductor
  • possessing a thickness of min. 10 mm to avoid saturation
  • characterized by even structure
  • under conditions of ideal adhesion (surface-to-surface)
  • under axial force direction (90-degree angle)
  • at conditions approx. 20°C

Key elements affecting lifting force

Real force is affected by working environment parameters, including (from priority):

  • Clearance – existence of any layer (paint, dirt, gap) acts as an insulator, which lowers power steeply (even by 50% at 0.5 mm).
  • Force direction – note that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the nominal value.
  • Substrate thickness – for full efficiency, the steel must be adequately massive. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
  • Steel type – low-carbon 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.
  • Temperature – heating the magnet causes a temporary drop of force. It is worth remembering the maximum operating temperature for a given model.

* Holding force was tested on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, however under parallel forces the load capacity is reduced by as much as fivefold. In addition, even a slight gap {between} the magnet and the plate decreases the load capacity.

Warnings

Thermal limits

Control the heat. Exposing the magnet to high heat will destroy its magnetic structure and strength.

Dust is flammable

Drilling and cutting of NdFeB material carries a risk of fire hazard. Neodymium dust reacts violently with oxygen and is hard to extinguish.

Swallowing risk

Always store magnets away from children. Ingestion danger is high, and the effects of magnets connecting inside the body are very dangerous.

Finger safety

Risk of injury: The attraction force is so immense that it can cause blood blisters, crushing, and broken bones. Protective gloves are recommended.

Handling guide

Handle with care. Neodymium magnets attract from a long distance and connect with massive power, often quicker than you can react.

Avoid contact if allergic

Certain individuals have a sensitization to nickel, which is the typical protective layer for neodymium magnets. Frequent touching might lead to dermatitis. We strongly advise wear safety gloves.

Health Danger

For implant holders: Powerful magnets affect medical devices. Maintain at least 30 cm distance or ask another person to work with the magnets.

Compass and GPS

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

Shattering risk

Neodymium magnets are sintered ceramics, meaning they are prone to chipping. Clashing of two magnets leads to them cracking into small pieces.

Electronic hazard

Data protection: Strong magnets can damage data carriers and delicate electronics (pacemakers, medical aids, mechanical watches).

Danger!

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