tel: +48 888 99 98 98

neodymium magnets

We offer yellow color magnets Nd2Fe14B - our proposal. All magnesy neodymowe in our store are available for immediate delivery (check the list). See the magnet price list for more details check the magnet price list

Magnets for water searching F300 GOLD

Where to buy powerful magnet? Holders with magnets in airtight and durable steel enclosure are excellent for use in difficult weather conditions, including snow and rain check

magnets with holders

Magnetic holders can be used to enhance production, exploring underwater areas, or searching for meteors made of ore see...

We promise to ship ordered magnets on the same day by 2:00 PM on business days.

Dhit sp. z o.o.
Product available Ships today (order by 14:00)

SM 25x250 [2xM8] / N42 - magnetic separator

magnetic separator

Catalog no 130293

GTIN/EAN: 5906301812869

5.00

Diameter Ø

25 mm [±1 mm]

Height

250 mm [±1 mm]

Weight

0.01 g

Magnetic Flux

~ 6 500 Gauss [±5%]

688.80 with VAT / pcs + price for transport

560.00 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs
560.00 ZŁ
688.80 ZŁ
price from 5 pcs
532.00 ZŁ
654.36 ZŁ
price from 10 pcs
504.00 ZŁ
619.92 ZŁ
Want to negotiate?

Call us +48 888 99 98 98 or drop us a message using our online form the contact section.
Weight and structure of a neodymium magnet can be tested on our online calculation tool.

Orders placed before 14:00 will be shipped the same business day.

SM 25x250 [2xM8] / N42 - magnetic separator

Specification / characteristics SM 25x250 [2xM8] / N42 - magnetic separator

properties
properties values
Cat. no. 130293
GTIN/EAN 5906301812869
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 25 mm [±1 mm]
Height 250 mm [±1 mm]
Weight 0.01 g
Material Type Stainless steel AISI 304 / A2
Magnetic Flux ~ 6 500 Gauss [±5%]
Size/Mount Quantity 2xM8
Polarity circumferential - 9 poles
Casing Tube Thickness 1 mm
Manufacturing Tolerance ±1 mm

Magnetic properties of material N42

Specification / characteristics SM 25x250 [2xM8] / N42 - magnetic separator
properties values units
remenance Br [Min. - Max.] ? 12.9-13.2 kGs
remenance Br [Min. - Max.] ? 1290-1320 T
coercivity bHc ? 10.8-12.0 kOe
coercivity bHc ? 860-955 kA/m
actual internal force iHc ≥ 12 kOe
actual internal force iHc ≥ 955 kA/m
energy density [Min. - Max.] ? 40-42 BH max MGOe
energy density [Min. - Max.] ? 318-334 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
Technical and environmental data
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%
Ecology and recycling (GPSR)
recyclability (EoL) 100%
recycled raw materials ~10% (pre-cons)
carbon footprint low / zredukowany
waste code (EWC) 16 02 16
ul. ,
Tel:
E-mail: kontakt@dhit.pl
ID: 0000-2025
Magnet Unit Converter
Pulling Force

Magnetic Field

View also deals

It is the "heart" of every magnetic filter used in industry for cleaning raw materials. It is commonly used for cleaning flour, sugar, plastic granules, as well as oils and coolants. Thanks to the use of strong neodymium magnets, the rod catches even metallic dust.
The rod consists of a cover tube made of high-quality acid-resistant steel (AISI 304 or 316). Inside there is a stack of strong neodymium magnets arranged in a special configuration (magnetic circuit). Such construction ensures full resistance to corrosion, water, oils, and acids.
Due to the high power of the magnet, direct removal of filings can be troublesome and time-consuming. The most effective home method is using adhesive tape, which we wrap around the dirt and peel off. In industry, cover tubes (so-called Easy Clean system) are used, from which the magnetic insert slides out.
The more Gauss, the smaller and more weakly magnetic particles will be effectively caught. For basic machine protection against pieces of iron, standard power is sufficient. High induction is necessary when contaminants are microscopic or weakly magnetic.
We fulfill individual orders for bars perfectly matched to your machine or separator. You can choose a mounting method consistent with your technical design. We ensure fast realization of special orders and technical advice.

Advantages and disadvantages of Nd2Fe14B magnets.

Strengths
Besides their stability, neodymium magnets are valued for these benefits:
  • They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (based on calculations),
  • They possess excellent resistance to magnetic field loss when exposed to external magnetic sources,
  • By covering with a lustrous coating of gold, the element presents an proper look,
  • Magnetic induction on the working part of the magnet turns out to be extremely intense,
  • Thanks to resistance to high temperature, they are capable of working (depending on the form) even at temperatures up to 230°C and higher...
  • Thanks to flexibility in constructing and the ability to customize to complex applications,
  • Key role in high-tech industry – they serve a role in magnetic memories, brushless drives, medical devices, as well as other advanced devices.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Disadvantages
Drawbacks and weaknesses of neodymium magnets and proposals for their use:
  • Brittleness is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a steel housing, which not only secures them against impacts but also increases their durability
  • We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
  • When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation and corrosion.
  • Due to limitations in realizing threads and complicated shapes in magnets, we recommend using casing - magnetic holder.
  • Health risk to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which gains importance in the context of child health protection. Furthermore, small components of these products are able to be problematic in diagnostics medical after entering the body.
  • With large orders the cost of neodymium magnets is a challenge,

Pull force analysis

Magnetic strength at its maximum – what it depends on?
The specified lifting capacity represents the limit force, obtained under laboratory conditions, meaning:
  • using a base made of low-carbon steel, acting as a magnetic yoke
  • whose thickness equals approx. 10 mm
  • with a surface perfectly flat
  • without the slightest insulating layer between the magnet and steel
  • for force applied at a right angle (in the magnet axis)
  • at temperature room level
Determinants of lifting force in real conditions
Holding efficiency is influenced by specific conditions, including (from most important):
  • Distance – existence of foreign body (paint, dirt, gap) acts as an insulator, which reduces capacity rapidly (even by 50% at 0.5 mm).
  • Load vector – maximum parameter is obtained only during pulling at a 90° angle. The force required to slide of the magnet along the plate is standardly many times lower (approx. 1/5 of the lifting capacity).
  • Metal thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of generating force.
  • Steel grade – the best choice is high-permeability steel. Stainless steels may attract less.
  • Surface structure – the more even the surface, the larger the contact zone and stronger the hold. Roughness acts like micro-gaps.
  • Thermal factor – hot environment reduces pulling force. Too high temperature can permanently demagnetize the magnet.

Lifting capacity was determined using a polished steel plate of optimal thickness (min. 20 mm), under vertically applied force, whereas under parallel forces the load capacity is reduced by as much as 5 times. Moreover, even a slight gap between the magnet’s surface and the plate decreases the holding force.

Safe handling of NdFeB magnets
Crushing force

Risk of injury: The pulling power is so immense that it can result in blood blisters, pinching, and even bone fractures. Protective gloves are recommended.

Shattering risk

Despite the nickel coating, the material is delicate and not impact-resistant. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Warning for heart patients

Health Alert: Strong magnets can turn off heart devices and defibrillators. Stay away if you have medical devices.

Maximum temperature

Control the heat. Heating the magnet above 80 degrees Celsius will ruin its magnetic structure and pulling force.

Fire warning

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

Respect the power

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

Nickel coating and allergies

Allergy Notice: The Ni-Cu-Ni coating contains nickel. If skin irritation happens, cease working with magnets and use protective gear.

Electronic devices

Equipment safety: Neodymium magnets can damage payment cards and sensitive devices (pacemakers, hearing aids, timepieces).

Swallowing risk

Only for adults. Small elements can be swallowed, causing severe trauma. Store away from kids and pets.

GPS Danger

A strong magnetic field negatively affects the operation of magnetometers in phones and GPS navigation. Keep magnets near a smartphone to avoid breaking the sensors.

Caution! More info about risks in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98