e-mail: bok@dhit.pl

neodymium magnets

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

Magnet for fishing F200 GOLD

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

magnets with holders

Magnetic holders can be applied to facilitate production, exploring underwater areas, or searching for space rocks from gold more information...

Enjoy delivery of your order on the day of purchase by 2:00 PM on weekdays.

Dhit sp. z o.o.
Product available Ships tomorrow

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

magnetic separator

Catalog no 130370

GTIN: 5906301813187

0

Diameter Ø [±0,1 mm]

25 mm

Height [±0,1 mm]

325 mm

Weight

0.01 g

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

Need help making a decision?

Call us +48 22 499 98 98 otherwise contact us via our online form the contact page.
Weight along with appearance of neodymium magnets can be tested with our our magnetic 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 [±0,1 mm]
Height
325 mm [±0,1 mm]
Weight
0.01 g [±0,1 mm]
Manufacturing Tolerance
± 0.1 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. 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 center is filled with NdFeB magnets and pole pieces, arranged to maximize the field on the tube surface. Thanks to this, the rod is durable, hygienic, and easy to keep clean.
Metal filings stick to the surface very strongly, so cleaning requires strength or cleverness. The most effective home method is using adhesive tape, which we wrap around the dirt and peel off. 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. Standard rods (~8000 Gs) are sufficient for catching screws, nails, and steel shavings. High induction is necessary when contaminants are microscopic or weakly magnetic.
We can produce a rod of non-standard length with any mounting termination. You can choose a mounting method consistent with your technical design. Contact us for a quote on a non-standard dimension.

Pros and cons of neodymium magnets.

Besides their durability, neodymium magnets are valued for these benefits:

  • They virtually do not lose strength, because even after 10 years the decline in efficiency is only ~1% (according to literature),
  • They are resistant to demagnetization induced by external magnetic fields,
  • A magnet with a metallic nickel surface is more attractive,
  • The surface of neodymium magnets generates a powerful magnetic field – this is one of their assets,
  • Through (appropriate) combination of ingredients, they can achieve high thermal strength, enabling action at temperatures approaching 230°C and above...
  • Due to the potential of free forming and customization to individualized projects, magnetic components can be modeled in a broad palette of forms and dimensions, which amplifies use scope,
  • Versatile presence in electronics industry – they find application in hard drives, brushless drives, precision medical tools, also modern systems.
  • Thanks to concentrated force, small magnets offer high operating force, occupying minimum space,

Problematic aspects of neodymium magnets: tips and applications.

  • 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 increases their durability
  • When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • Magnets exposed to a humid environment can rust. Therefore when using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • We suggest a housing - magnetic mount, due to difficulties in creating threads inside the magnet and complex shapes.
  • Potential hazard resulting from small fragments of magnets are risky, in case of ingestion, which becomes key in the context of child health protection. It is also worth noting that tiny parts of these devices are able to be problematic in diagnostics medical after entering the body.
  • Due to expensive raw materials, their price is relatively high,

Highest magnetic holding forcewhat contributes to it?

Information about lifting capacity was determined for optimal configuration, taking into account:

  • using a sheet made of mild steel, functioning as a circuit closing element
  • possessing a massiveness of minimum 10 mm to avoid saturation
  • with an polished touching surface
  • under conditions of no distance (surface-to-surface)
  • during detachment in a direction vertical to the mounting surface
  • at conditions approx. 20°C

Practical lifting capacity: influencing factors

It is worth knowing that the working load will differ subject to elements below, starting with the most relevant:

  • Gap (between the magnet and the plate), because even a tiny clearance (e.g. 0.5 mm) leads to a decrease in lifting capacity by up to 50% (this also applies to paint, rust or debris).
  • Force direction – note that the magnet has greatest strength perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the maximum value.
  • Substrate thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
  • Steel grade – the best choice is pure iron steel. Stainless steels may attract less.
  • Surface finish – full contact is obtained only on smooth steel. Any scratches and bumps create air cushions, weakening the magnet.
  • Heat – neodymium magnets have a negative temperature coefficient. At higher temperatures they are weaker, and at low temperatures gain strength (up to a certain limit).

* Lifting capacity was determined using a polished steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, however under shearing force the holding force is lower. Moreover, even a minimal clearance {between} the magnet and the plate lowers the load capacity.

Safety rules for work with NdFeB magnets

Respect the power

Exercise caution. Rare earth magnets attract from a long distance and connect with huge force, often faster than you can react.

Compass and GPS

Be aware: neodymium magnets generate a field that confuses sensitive sensors. Maintain a safe distance from your mobile, tablet, and navigation systems.

Do not overheat magnets

Standard neodymium magnets (grade N) lose magnetization when the temperature goes above 80°C. This process is irreversible.

Warning for allergy sufferers

Nickel alert: The nickel-copper-nickel coating contains nickel. If skin irritation happens, cease working with magnets and wear gloves.

Hand protection

Large magnets can break fingers instantly. Do not place your hand betwixt two attracting surfaces.

Mechanical processing

Fire warning: Neodymium dust is explosive. Avoid machining magnets in home conditions as this risks ignition.

Do not give to children

Strictly keep magnets away from children. Risk of swallowing is high, and the effects of magnets clamping inside the body are fatal.

Warning for heart patients

Warning for patients: Powerful magnets disrupt electronics. Keep at least 30 cm distance or ask another person to handle the magnets.

Magnet fragility

Beware of splinters. Magnets can fracture upon uncontrolled impact, ejecting sharp fragments into the air. Eye protection is mandatory.

Magnetic media

Intense magnetic fields can destroy records on credit cards, hard drives, and storage devices. Stay away of min. 10 cm.

Attention!

More info about hazards in the article: Magnet Safety Guide.

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98