e-mail: bok@dhit.pl

neodymium magnets

We provide yellow color magnets Nd2Fe14B - our proposal. All "neodymium magnets" in our store are in stock for immediate purchase (see the list). Check out the magnet price list for more details check the magnet price list

Magnet for treasure hunters F200 GOLD

Where to purchase strong magnet? Magnet holders in airtight and durable steel enclosure are perfect for use in difficult, demanding weather, including in the rain and snow see more

magnets with holders

Magnetic holders can be applied to enhance manufacturing, underwater exploration, or locating meteorites made of ore see...

Order is shipped on the day of purchase by 2:00 PM on weekdays.

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

SMZR 25x150 / N52 - magnetic separator with handle

magnetic separator with handle

Catalog no 140234

GTIN/EAN: 5906301813422

5.00

Diameter Ø

25 mm [±1 mm]

Height

150 mm [±1 mm]

Weight

0.01 g

Magnetic Flux

~ 9 500 Gauss [±5%]

430.50 with VAT / pcs + price for transport

350.00 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs
350.00 ZŁ
430.50 ZŁ
price from 5 pcs
329.00 ZŁ
404.67 ZŁ
price from 10 pcs
308.00 ZŁ
378.84 ZŁ
Not sure which magnet to buy?

Give us a call +48 888 99 98 98 if you prefer send us a note by means of our online form the contact page.
Parameters along with form of neodymium magnets can be checked using our magnetic mass calculator.

Order by 14:00 and we’ll ship today!

SMZR 25x150 / N52 - magnetic separator with handle

Specification / characteristics SMZR 25x150 / N52 - magnetic separator with handle

properties
properties values
Cat. no. 140234
GTIN/EAN 5906301813422
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 150 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 - 5 poles
Casing Tube Thickness 1 mm
Manufacturing Tolerance ±1 mm

Magnetic properties of material N52

Specification / characteristics SMZR 25x150 / N52 - magnetic separator with handle
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
Engineering data and GPSR
Material specification
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%
Environmental data
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
Measurement Calculator
Magnet Pull Force

Magnetic Induction

See also proposals

This gripper serves for instant distinction of steel (iron) from non-ferrous metals. Thanks to it, you can easily and quickly assess the value of scrap and avoid mistakes. It can be used to collect scattered nails and screws from hard-to-reach places.
The tool reacts to carbon steel but does not attract most stainless steels (austenitic, like AISI 304). If the magnet does not attract the tested element, it is probably non-ferrous metal or acid-resistant steel.
Neodymiums are more compact and effective during all-day work at a scrap yard. Thanks to this, work is more comfortable, and detection faster and more certain. This is a modern solution displacing heavy and weak ferrite magnets.
The construction consists of a hermetic can protecting the magnet and an ergonomic handle. Tool ergonomics are key with frequent use by employees. The tool is durable, drop-resistant, and prepared for hard work.
Standard manual separators (such as SMZR 25x150 / N52) do not have a release mechanism and require manual cleaning. Models with a release lever (so-called grippers with a dropper) are also available in another category. The sliding technique is more effective and requires less force than perpendicular tearing.

Pros and cons of rare earth magnets.

Strengths
Besides their high retention, neodymium magnets are valued for these benefits:
  • They retain attractive force for nearly ten years – the drop is just ~1% (in theory),
  • They are noted for resistance to demagnetization induced by external disturbances,
  • By using a lustrous layer of gold, the element has an modern look,
  • 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 form) even at high temperatures reaching 230°C or more...
  • Thanks to the possibility of accurate molding and customization to individualized requirements, magnetic components can be modeled in a variety of geometric configurations, which makes them more universal,
  • Significant place in electronics industry – they serve a role in computer drives, electromotive mechanisms, advanced medical instruments, and other advanced devices.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which enables their usage in compact constructions
Limitations
Cons of neodymium magnets: weaknesses and usage proposals
  • Susceptibility to cracking is one of their disadvantages. Upon intense impact they can fracture. We advise keeping them in a strong case, which not only secures them against impacts but also raises their durability
  • Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (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
  • They rust in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in creating nuts and complex shapes in magnets, we recommend using cover - magnetic mount.
  • Potential hazard related to microscopic parts of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child safety. Furthermore, small elements of these products are able to disrupt the diagnostic process medical after entering the body.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Lifting parameters

Maximum magnetic pulling forcewhat it depends on?
The load parameter shown concerns the maximum value, recorded under ideal test conditions, specifically:
  • using a plate made of low-carbon steel, serving as a magnetic yoke
  • with a thickness of at least 10 mm
  • characterized by smoothness
  • without any insulating layer between the magnet and steel
  • during pulling in a direction perpendicular to the mounting surface
  • at room temperature
Determinants of practical lifting force of a magnet
During everyday use, the actual lifting capacity is determined by a number of factors, ranked from most significant:
  • Distance – existence of foreign body (rust, tape, gap) interrupts the magnetic circuit, which reduces power steeply (even by 50% at 0.5 mm).
  • Angle of force application – highest force is reached only during perpendicular pulling. The resistance to sliding of the magnet along the surface is standardly many times lower (approx. 1/5 of the lifting capacity).
  • Plate thickness – insufficiently thick steel does not accept the full field, causing part of the power to be escaped to the other side.
  • Plate material – low-carbon steel attracts best. Higher carbon content lower magnetic permeability and holding force.
  • Smoothness – full contact is obtained only on polished steel. Rough texture create air cushions, weakening the magnet.
  • Thermal environment – heating the magnet results in weakening of force. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, whereas under attempts to slide the magnet the load capacity is reduced by as much as 75%. Moreover, even a minimal clearance between the magnet and the plate decreases the load capacity.

Safety rules for work with neodymium magnets
Eye protection

Despite metallic appearance, the material is brittle and cannot withstand shocks. Do not hit, as the magnet may shatter into hazardous fragments.

Pinching danger

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

Dust explosion hazard

Drilling and cutting of NdFeB material carries a risk of fire hazard. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.

Sensitization to coating

Nickel alert: The Ni-Cu-Ni coating consists of nickel. If an allergic reaction occurs, immediately stop working with magnets and use protective gear.

Warning for heart patients

For implant holders: Strong magnetic fields affect electronics. Maintain minimum 30 cm distance or request help to work with the magnets.

Do not give to children

Neodymium magnets are not suitable for play. Eating multiple magnets may result in them pinching intestinal walls, which constitutes a critical condition and necessitates urgent medical intervention.

Permanent damage

Avoid heat. Neodymium magnets are susceptible to temperature. If you need resistance above 80°C, look for special high-temperature series (H, SH, UH).

Threat to electronics

Do not bring magnets near a wallet, laptop, or TV. The magnetic field can destroy these devices and erase data from cards.

Powerful field

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

Magnetic interference

GPS units and smartphones are extremely sensitive to magnetic fields. Close proximity with a powerful NdFeB magnet can decalibrate the sensors in your phone.

Attention! More info about risks in the article: Safety of working with magnets.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98