tel: +48 22 499 98 98

neodymium magnets

We offer red color magnets Nd2Fe14B - our store's offer. All "neodymium magnets" on our website are in stock for immediate delivery (see the list). See the magnet pricing for more details see the magnet price list

Magnet for searching F300 GOLD

Where to purchase powerful neodymium magnet? Magnet holders in airtight and durable enclosure are perfect for use in variable and difficult weather, including during rain and snow check...

magnetic holders

Holders with magnets can be used to improve production processes, exploring underwater areas, or searching for meteors from gold check...

Enjoy delivery of your order on the same day by 2:00 PM on business days.

Dhit sp. z o.o.
Product available Ships tomorrow

MP 30x6x10 / N38 - ring magnet

ring magnet

Catalog no 030197

GTIN: 5906301812142

5

Diameter [±0,1 mm]

30 mm

internal diameter Ø [±0,1 mm]

6 mm

Height [±0,1 mm]

10 mm

Weight

56.55 g

Magnetization Direction

↑ axial

Load capacity

3.42 kg / 33.54 N

Magnetic Induction

248.80 mT

Coating

[NiCuNi] nickel

16.00 with VAT / pcs + price for transport

13.01 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs
13.01 ZŁ
16.00 ZŁ
price from 50 pcs
12.23 ZŁ
15.04 ZŁ
price from 200 pcs
11.45 ZŁ
14.08 ZŁ

Need advice?

Pick up the phone and ask +48 22 499 98 98 or send us a note via form the contact section.
Strength and appearance of a magnet can be verified using our force calculator.

Order by 14:00 and we’ll ship today!

MP 30x6x10 / N38 - ring magnet
Specification/characteristics MP 30x6x10 / N38 - ring magnet
properties
values
Cat. no.
030197
GTIN
5906301812142
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter
30 mm [±0,1 mm]
internal diameter Ø
6 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
56.55 g [±0,1 mm]
Magnetization Direction
↑ axial
Load capacity ~ ?
3.42 kg / 33.54 N
Magnetic Induction ~ ?
248.80 mT
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

It is ideally suited for places where solid attachment of the magnet to the substrate is required without the risk of detachment. Thanks to the hole (often for a screw), this model enables easy screwing to wood, wall, plastic, or metal. This product with a force of 3.42 kg works great as a door latch, speaker holder, or mounting element in devices.
This material behaves more like porcelain than steel, so it doesn't forgive mistakes during mounting. One turn too many can destroy the magnet, so do it slowly. It's a good idea to use a flexible washer under the screw head, which will cushion the stresses. Remember: cracking during assembly results from material properties, not a product defect.
Moisture can penetrate micro-cracks in the coating and cause oxidation of the magnet. In the place of the mounting hole, the coating is thinner and easily scratched when tightening the screw, which will become a corrosion focus. This product is dedicated for indoor use. For outdoor applications, we recommend choosing magnets in hermetic housing or additional protection with varnish.
A screw or bolt with a thread diameter smaller than 6 mm fits this model. If the magnet does not have a chamfer (cone), we recommend using a screw with a flat or cylindrical head, or possibly using a washer. Aesthetic mounting requires selecting the appropriate head size.
It is a magnetic ring with a diameter of 30 mm and thickness 10 mm. The pulling force of this model is an impressive 3.42 kg, which translates to 33.54 N in newtons. The mounting hole diameter is precisely 6 mm.
These magnets are magnetized axially (through the thickness), which means one flat side is the N pole and the other is S. In the case of connecting two rings, make sure one is turned the right way. We do not offer paired sets with marked poles in this category, but they are easy to match manually.

Strengths as well as weaknesses of rare earth magnets.

Besides their stability, neodymium magnets are valued for these benefits:

  • They have constant strength, and over nearly ten years their attraction force decreases symbolically – ~1% (in testing),
  • They have excellent resistance to magnetism drop as a result of external magnetic sources,
  • In other words, due to the metallic finish of gold, the element looks attractive,
  • Neodymium magnets achieve maximum magnetic induction on a small area, which ensures high operational effectiveness,
  • 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...
  • Possibility of exact creating as well as optimizing to specific needs,
  • Fundamental importance in electronics industry – they are commonly used in mass storage devices, electric motors, medical equipment, as well as multitasking production systems.
  • Thanks to concentrated force, small magnets offer high operating force, in miniature format,

Characteristics of disadvantages of neodymium magnets: tips and applications.

  • To avoid cracks under impact, we suggest using special steel holders. Such a solution secures the magnet and simultaneously increases its durability.
  • Neodymium magnets decrease their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation and corrosion.
  • Due to limitations in producing threads and complex shapes in magnets, we propose using cover - magnetic mechanism.
  • Possible danger to health – tiny shards of magnets are risky, when accidentally swallowed, which becomes key in the context of child health protection. It is also worth noting that small elements of these magnets can complicate diagnosis medical in case of swallowing.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Maximum magnetic pulling forcewhat it depends on?

The force parameter is a measurement result executed under standard conditions:

  • with the contact of a sheet made of special test steel, ensuring full magnetic saturation
  • with a cross-section minimum 10 mm
  • with a plane free of scratches
  • under conditions of no distance (metal-to-metal)
  • during pulling in a direction perpendicular to the plane
  • at ambient temperature room level

Practical lifting capacity: influencing factors

Please note that the working load may be lower depending on elements below, starting with the most relevant:

  • Gap between surfaces – even a fraction of a millimeter of separation (caused e.g. by varnish or dirt) diminishes the pulling force, often by half at just 0.5 mm.
  • Angle of force application – highest force is obtained only during pulling at a 90° angle. The shear force of the magnet along the plate is usually several times smaller (approx. 1/5 of the lifting capacity).
  • Metal thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of converting into lifting capacity.
  • Steel grade – ideal substrate is pure iron steel. Stainless steels may attract less.
  • Surface condition – smooth surfaces guarantee perfect abutment, which increases field saturation. Uneven metal reduce efficiency.
  • Temperature influence – hot environment reduces magnetic field. Too high temperature can permanently demagnetize the magnet.

* 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. Additionally, even a small distance {between} the magnet and the plate decreases the lifting capacity.

Precautions when working with NdFeB magnets

Implant safety

Patients with a heart stimulator should maintain an large gap from magnets. The magnetism can disrupt the functioning of the implant.

Heat sensitivity

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

Mechanical processing

Dust generated during cutting of magnets is flammable. Avoid drilling into magnets unless you are an expert.

Keep away from electronics

A powerful magnetic field interferes with the functioning of magnetometers in phones and GPS navigation. Keep magnets near a smartphone to avoid breaking the sensors.

Powerful field

Exercise caution. Neodymium magnets attract from a long distance and connect with huge force, often faster than you can react.

Allergic reactions

Studies show that nickel (standard magnet coating) is a strong allergen. If you have an allergy, refrain from touching magnets with bare hands and select versions in plastic housing.

Risk of cracking

Despite metallic appearance, the material is brittle and not impact-resistant. Do not hit, as the magnet may crumble into sharp, dangerous pieces.

Data carriers

Device Safety: Strong magnets can ruin payment cards and sensitive devices (pacemakers, medical aids, timepieces).

No play value

Absolutely keep magnets away from children. Ingestion danger is significant, and the effects of magnets clamping inside the body are very dangerous.

Physical harm

Protect your hands. Two powerful magnets will snap together immediately with a force of several hundred kilograms, destroying anything in their path. Exercise extreme caution!

Danger!

Need more info? Check our post: Are neodymium magnets dangerous?

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98