tel: +48 888 99 98 98

neodymium magnets

We offer blue color magnets Nd2Fe14B - our proposal. Practically all "magnets" in our store are available for immediate purchase (check the list). See the magnet pricing for more details check the magnet price list

Magnet for water searching F400 GOLD

Where to purchase very strong magnet? Magnet holders in airtight and durable steel casing are excellent for use in difficult weather, including during rain and snow check

magnetic holders

Holders with magnets can be used to facilitate production, underwater discoveries, or searching for space rocks from gold more...

Shipping always shipped on the day of purchase before 2:00 PM on working days.

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

SM 25x325 [2xM8] / N52 - magnetic separator

magnetic separator

Catalog no 130370

GTIN: 5906301813187

0

Diameter Ø

25 mm [±1 mm]

Height

325 mm [±1 mm]

Weight

0.01 g

Magnetic Flux

~ 9 500 Gauss [±5%]

984.00 with VAT / pcs + price for transport

800.00 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs
800.00 ZŁ
984.00 ZŁ
price from 5 pcs
760.00 ZŁ
934.80 ZŁ
price from 10 pcs
720.00 ZŁ
885.60 ZŁ

Not sure about your choice?

Call us now +48 22 499 98 98 alternatively contact us by means of our online form the contact section.
Force as well as appearance of magnets can be estimated on our force calculator.

Same-day processing for orders placed before 14:00.

SM 25x325 [2xM8] / N52 - magnetic separator
Specification/characteristics SM 25x325 [2xM8] / N52 - magnetic separator
properties
values
Cat. no.
130370
GTIN
5906301813187
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
25 mm [±1 mm]
Height
325 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 - 12 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. 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). 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.
Magnetic induction measured in Gauss (Gs) determines the density of magnetic flux on the rod surface. 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. 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.

Apart from their consistent magnetism, neodymium magnets have these key benefits:

  • They have constant strength, and over around ten years their attraction force decreases symbolically – ~1% (according to theory),
  • They feature excellent resistance to weakening of magnetic properties as a result of opposing magnetic fields,
  • By applying a reflective layer of gold, the element has an modern look,
  • Neodymium magnets generate maximum magnetic induction on a small area, which increases force concentration,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
  • In view of the possibility of flexible molding and customization to custom projects, neodymium magnets can be modeled in a variety of forms and dimensions, which amplifies use scope,
  • Fundamental importance in modern technologies – they are utilized in magnetic memories, brushless drives, advanced medical instruments, as well as multitasking production systems.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Disadvantages of NdFeB magnets:

  • To avoid cracks under impact, we recommend using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
  • When exposed to high temperature, neodymium magnets experience a drop in force. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets 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 casing - magnetic mechanism.
  • Health risk to health – tiny shards of magnets pose a threat, in case of ingestion, which is particularly important in the context of child safety. Furthermore, small components of these devices are able to be problematic in diagnostics medical in case of swallowing.
  • With budget limitations the cost of neodymium magnets can be a barrier,

Maximum magnetic pulling forcewhat affects it?

Breakaway force was determined for ideal contact conditions, including:

  • using a base made of low-carbon steel, acting as a circuit closing element
  • with a thickness of at least 10 mm
  • characterized by lack of roughness
  • under conditions of gap-free contact (metal-to-metal)
  • for force acting at a right angle (in the magnet axis)
  • at standard ambient temperature

Determinants of practical lifting force of a magnet

During everyday use, the real power depends on several key aspects, listed from most significant:

  • Distance (between the magnet and the plate), as even a microscopic distance (e.g. 0.5 mm) can cause a reduction in lifting capacity by up to 50% (this also applies to paint, rust or debris).
  • Angle of force application – maximum parameter is reached only during perpendicular pulling. The force required to slide of the magnet along the plate is standardly many times smaller (approx. 1/5 of the lifting capacity).
  • Wall thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of converting into lifting capacity.
  • Steel grade – the best choice is pure iron steel. Stainless steels may have worse magnetic properties.
  • Surface finish – ideal contact is possible only on smooth steel. Any scratches and bumps create air cushions, weakening the magnet.
  • Temperature – temperature increase causes a temporary drop of induction. Check the thermal limit for a given model.

* Lifting capacity was determined using a steel plate with a smooth surface of optimal thickness (min. 20 mm), under vertically applied force, whereas under attempts to slide the magnet the holding force is lower. Moreover, even a minimal clearance {between} the magnet and the plate lowers the lifting capacity.

Precautions when working with NdFeB magnets

Flammability

Dust produced during cutting of magnets is combustible. Do not drill into magnets without proper cooling and knowledge.

Warning for heart patients

Patients with a pacemaker should keep an absolute distance from magnets. The magnetism can stop the functioning of the implant.

Allergic reactions

Some people suffer from a contact allergy to nickel, which is the common plating for NdFeB magnets. Extended handling can result in dermatitis. We recommend wear protective gloves.

Compass and GPS

An intense magnetic field interferes with the operation of compasses in smartphones and GPS navigation. Maintain magnets close to a device to prevent damaging the sensors.

Hand protection

Watch your fingers. Two large magnets will join immediately with a force of massive weight, crushing everything in their path. Be careful!

Swallowing risk

These products are not toys. Accidental ingestion of several magnets may result in them attracting across intestines, which poses a critical condition and requires immediate surgery.

Immense force

Before starting, read the rules. Sudden snapping can destroy the magnet or injure your hand. Think ahead.

Thermal limits

Avoid heat. Neodymium magnets are sensitive to temperature. If you require resistance above 80°C, inquire about HT versions (H, SH, UH).

Protect data

Data protection: Neodymium magnets can ruin data carriers and sensitive devices (heart implants, medical aids, mechanical watches).

Fragile material

Beware of splinters. Magnets can fracture upon violent connection, launching shards into the air. Eye protection is mandatory.

Important!

More info about hazards in the article: Safety of working with magnets.

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98