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neodymium magnets

We provide red color magnetic Nd2Fe14B - our proposal. Practically all magnesy neodymowe in our store are in stock for immediate delivery (check the list). See the magnet pricing for more details check the magnet price list

Magnet for water searching F300 GOLD

Where to purchase strong neodymium magnet? Holders with magnets in airtight, solid steel enclosure are perfect for use in challenging weather, including during snow and rain see

magnetic holders

Holders with magnets can be applied to improve production processes, exploring underwater areas, or searching for space rocks made of metal read...

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

Dhit sp. z o.o.
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SM 25x225 [2xM8] / N52 - magnetic separator

magnetic separator

Catalog no 130354

GTIN: 5906301813026

5

Diameter Ø

25 mm [±1 mm]

Height

225 mm [±1 mm]

Weight

0.01 g

Magnetic Flux

~ 9 500 Gauss [±5%]

688.80 with VAT / pcs + price for transport

560.00 ZŁ net + 23% VAT / pcs

bulk discounts:

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price from 1 pcs
560.00 ZŁ
688.80 ZŁ
price from 5 pcs
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654.36 ZŁ
price from 10 pcs
504.00 ZŁ
619.92 ZŁ

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Give us a call +48 888 99 98 98 alternatively let us know via contact form the contact section.
Lifting power along with structure of a neodymium magnet can be tested using our modular calculator.

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SM 25x225 [2xM8] / N52 - magnetic separator
Specification/characteristics SM 25x225 [2xM8] / N52 - magnetic separator
properties
values
Cat. no.
130354
GTIN
5906301813026
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
25 mm [±1 mm]
Height
225 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 - 8 poles
Casing Tube Thickness
1 mm
Manufacturing Tolerance
±1 mm

Magnetic properties of material N52

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

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

A magnetic rod is the basic element of building grate separators and magnetic filters. Its task is separation (separation) of metal filings from the transported material. 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). The core is a precise magnetic system generating high induction (Gauss). Thanks to this, the rod is durable, hygienic, and easy to keep clean.
Metal contaminants are strongly attracted, so removing them with a bare hand or glove can be difficult. We recommend sticking packing tape to the cluster of filings and tearing it off together with the contaminants. For easier operation, it is worth considering ordering a rod in a version with a cleaning sleeve.
The Gauss value tells us how effectively and deeply the magnet will catch contaminants. 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.
We can produce a rod of non-standard length with any mounting termination. The rod end is strictly adapted to the fastening system in your device. We ensure fast realization of special orders and technical advice.

Pros and cons of neodymium magnets.

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

  • They do not lose power, even during nearly 10 years – the reduction in lifting capacity is only ~1% (theoretically),
  • Neodymium magnets are distinguished by exceptionally resistant to demagnetization caused by external field sources,
  • The use of an shiny coating of noble metals (nickel, gold, silver) causes the element to look better,
  • The surface of neodymium magnets generates a maximum magnetic field – this is a key feature,
  • Through (adequate) combination of ingredients, they can achieve high thermal resistance, allowing for functioning at temperatures approaching 230°C and above...
  • Thanks to flexibility in forming and the ability to adapt to client solutions,
  • Versatile presence in future technologies – they are used in data components, brushless drives, medical equipment, and modern systems.
  • Thanks to concentrated force, small magnets offer high operating force, with minimal size,

Disadvantages of neodymium magnets:

  • To avoid cracks under impact, we recommend using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
  • We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 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 as well as corrosion.
  • Due to limitations in producing nuts and complicated forms in magnets, we propose using a housing - magnetic mount.
  • Health risk to health – tiny shards of magnets can be dangerous, if swallowed, which gains importance in the context of child health protection. Additionally, tiny parts of these products are able to disrupt the diagnostic process medical when they are in the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Optimal lifting capacity of a neodymium magnetwhat it depends on?

Magnet power was defined for ideal contact conditions, taking into account:

  • on a plate made of structural steel, perfectly concentrating the magnetic flux
  • possessing a thickness of minimum 10 mm to avoid saturation
  • with an polished contact surface
  • with zero gap (no paint)
  • for force applied at a right angle (in the magnet axis)
  • at ambient temperature approx. 20 degrees Celsius

Magnet lifting force in use – key factors

In practice, the real power depends on many variables, presented from crucial:

  • Distance (between the magnet and the metal), because even a very small clearance (e.g. 0.5 mm) results in a reduction in force by up to 50% (this also applies to varnish, corrosion or dirt).
  • Angle of force application – maximum parameter is reached only during pulling at a 90° angle. The force required to slide of the magnet along the plate is typically many times smaller (approx. 1/5 of the lifting capacity).
  • Element thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal limits the attraction force (the magnet "punches through" it).
  • Material type – ideal substrate is pure iron steel. Stainless steels may generate lower lifting capacity.
  • Smoothness – ideal contact is obtained only on smooth steel. Any scratches and bumps reduce the real contact area, weakening the magnet.
  • Temperature influence – hot environment reduces magnetic field. Too high temperature can permanently damage the magnet.

* Holding force was measured on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under parallel forces the load capacity is reduced by as much as 5 times. In addition, even a small distance {between} the magnet and the plate reduces the holding force.

Warnings

Allergic reactions

It is widely known that the nickel plating (standard magnet coating) is a potent allergen. If your skin reacts to metals, avoid direct skin contact or choose encased magnets.

Permanent damage

Do not overheat. Neodymium magnets are susceptible to heat. If you need operation above 80°C, ask us about special high-temperature series (H, SH, UH).

Flammability

Powder generated during grinding of magnets is combustible. Do not drill into magnets unless you are an expert.

Protective goggles

Protect your eyes. Magnets can fracture upon violent connection, ejecting shards into the air. Eye protection is mandatory.

Electronic devices

Data protection: Strong magnets can ruin data carriers and sensitive devices (pacemakers, medical aids, timepieces).

Choking Hazard

Product intended for adults. Tiny parts can be swallowed, causing serious injuries. Keep away from children and animals.

Implant safety

Medical warning: Strong magnets can deactivate pacemakers and defibrillators. Stay away if you have medical devices.

Powerful field

Use magnets with awareness. Their immense force can surprise even professionals. Plan your moves and respect their force.

GPS and phone interference

Navigation devices and mobile phones are highly sensitive to magnetism. Close proximity with a strong magnet can decalibrate the internal compass in your phone.

Physical harm

Large magnets can smash fingers instantly. Never place your hand between two strong magnets.

Safety First!

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