tel: +48 22 499 98 98

neodymium magnets

We offer red color magnetic Nd2Fe14B - our proposal. All magnesy neodymowe on our website are available for immediate purchase (check the list). Check out the magnet price list for more details check the magnet price list

Magnet for water searching F200 GOLD

Where to purchase powerful neodymium magnet? Magnetic holders in airtight, solid steel enclosure are ideally suited for use in variable and difficult weather, including in the rain and snow read

magnetic holders

Magnetic holders can be used to enhance production, underwater exploration, or searching for space rocks from gold read...

We promise to ship your order if the order is placed before 2:00 PM on working days.

Dhit sp. z o.o.
Product available Ships in 2 days

SM 25x250 [2xM8] / N52 - magnetic separator

magnetic separator

Catalog no 130371

GTIN: 5906301813194

5.00

Diameter Ø

25 mm [±1 mm]

Height

250 mm [±1 mm]

Weight

0.01 g

Magnetic Flux

~ 9 500 Gauss [±5%]

762.60 with VAT / pcs + price for transport

620.00 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs
620.00 ZŁ
762.60 ZŁ
price from 5 pcs
589.00 ZŁ
724.47 ZŁ
price from 10 pcs
558.00 ZŁ
686.34 ZŁ

Not sure where to buy?

Give us a call +48 22 499 98 98 otherwise send us a note by means of form our website.
Specifications as well as shape of a neodymium magnet can be checked using our force calculator.

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

SM 25x250 [2xM8] / N52 - magnetic separator

Specification / characteristics SM 25x250 [2xM8] / N52 - magnetic separator

properties
properties values
Cat. no. 130371
GTIN 5906301813194
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 ~ 9 500 Gauss [±5%]
Size/Mount Quantity 2xM8
Polarity circumferential - 9 poles
Casing Tube Thickness 1 mm
Manufacturing Tolerance ±1 mm

Magnetic properties of material N52

Specification / characteristics SM 25x250 [2xM8] / N52 - magnetic separator
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

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

Other deals

A magnetic rod is the basic element of building grate separators and magnetic filters. It is commonly used for cleaning flour, sugar, plastic granules, as well as oils and coolants. High magnetic induction on the surface allows catching the finest iron particles.
The rod consists of a cover tube made of high-quality acid-resistant steel (AISI 304 or 316). The center is filled with NdFeB magnets and pole pieces, arranged to maximize the field on the tube surface. Such construction ensures full resistance to corrosion, water, oils, and acids.
Metal contaminants are strongly attracted, so removing them with a bare hand or glove can be difficult. You can use compressed air or special non-magnetic strippers (rings). For easier operation, it is worth considering ordering a rod in a version with a cleaning sleeve.
The more Gauss, the smaller and more weakly magnetic particles will be effectively caught. The economical version (8kGs) handles large pieces of metal perfectly. High Power versions (~12000-14000 Gs) are necessary for catching metallic dust, oxides, and stainless steel after processing.
Yes, as a manufacturer, we make rods of any length and diameter (standard is dia 25mm and 32mm). The rod end is strictly adapted to the fastening system in your device. We ensure fast realization of special orders and technical advice.

Pros as well as cons of NdFeB magnets.

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

  • They virtually do not lose power, because even after 10 years the decline in efficiency is only ~1% (in laboratory conditions),
  • Neodymium magnets are characterized by exceptionally resistant to loss of magnetic properties caused by external interference,
  • The use of an refined finish of noble metals (nickel, gold, silver) causes the element to have aesthetics,
  • Neodymium magnets ensure maximum magnetic induction on a contact point, which increases force concentration,
  • Through (appropriate) combination of ingredients, they can achieve high thermal strength, allowing for functioning at temperatures reaching 230°C and above...
  • Thanks to freedom in shaping and the ability to adapt to complex applications,
  • Key role in modern industrial fields – they serve a role in mass storage devices, drive modules, precision medical tools, and other advanced devices.
  • Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,

Disadvantages of NdFeB magnets:

  • They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only protects the magnet but also improves its resistance to damage
  • Neodymium magnets lose strength when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
  • Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • We suggest cover - magnetic mount, due to difficulties in realizing threads inside the magnet and complex shapes.
  • Health risk to health – tiny shards of magnets are risky, if swallowed, which becomes key in the context of child safety. Additionally, small components of these magnets are able to complicate diagnosis medical when they are in the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Highest magnetic holding forcewhat affects it?

The force parameter is a theoretical maximum value performed under specific, ideal conditions:

  • using a base made of low-carbon steel, functioning as a circuit closing element
  • whose thickness is min. 10 mm
  • characterized by lack of roughness
  • without the slightest clearance between the magnet and steel
  • under axial force vector (90-degree angle)
  • at room temperature

Determinants of practical lifting force of a magnet

In practice, the actual lifting capacity depends on many variables, presented from most significant:

  • Space between magnet and steel – every millimeter of separation (caused e.g. by varnish or unevenness) significantly weakens the pulling force, often by half at just 0.5 mm.
  • Force direction – catalog parameter refers to pulling vertically. When slipping, the magnet holds significantly lower power (typically approx. 20-30% of nominal force).
  • Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field passes through the material instead of converting into lifting capacity.
  • Steel grade – the best choice is high-permeability steel. Stainless steels may have worse magnetic properties.
  • Smoothness – full contact is obtained only on smooth steel. Rough texture reduce the real contact area, weakening the magnet.
  • Temperature – temperature increase causes a temporary drop of induction. Check the maximum operating temperature for a given model.

* Lifting capacity testing was conducted on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, whereas under parallel forces the holding force is lower. Additionally, even a small distance {between} the magnet and the plate lowers the lifting capacity.

H&S for magnets

Permanent damage

Do not overheat. Neodymium magnets are susceptible to temperature. If you need resistance above 80°C, look for special high-temperature series (H, SH, UH).

Shattering risk

Despite the nickel coating, neodymium is delicate and cannot withstand shocks. Do not hit, as the magnet may shatter into hazardous fragments.

Swallowing risk

These products are not suitable for play. Swallowing several magnets may result in them connecting inside the digestive tract, which constitutes a severe health hazard and requires urgent medical intervention.

Finger safety

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

Cards and drives

Equipment safety: Strong magnets can ruin data carriers and delicate electronics (heart implants, medical aids, timepieces).

Skin irritation risks

Warning for allergy sufferers: The nickel-copper-nickel coating consists of nickel. If skin irritation happens, cease working with magnets and use protective gear.

Implant safety

Warning for patients: Strong magnetic fields disrupt medical devices. Keep at least 30 cm distance or ask another person to work with the magnets.

Threat to navigation

A strong magnetic field negatively affects the operation of magnetometers in phones and navigation systems. Do not bring magnets close to a device to prevent damaging the sensors.

Respect the power

Handle with care. Neodymium magnets attract from a long distance and snap with huge force, often quicker than you can move away.

Mechanical processing

Drilling and cutting of neodymium magnets poses a fire hazard. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.

Safety First!

Looking for details? Read our article: Why are neodymium magnets dangerous?

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98