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neodymium magnets

We offer yellow color magnets Nd2Fe14B - our proposal. Practically all "neodymium magnets" on our website are available for immediate purchase (see the list). See the magnet price list for more details check the magnet price list

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SM 32x150 [2xM8] / N42 - magnetic separator

magnetic separator

Catalog no 130297

GTIN: 5906301812906

5

Diameter Ø

32 mm [±1 mm]

Height

150 mm [±1 mm]

Weight

804 g

Magnetic Flux

~ 8 000 Gauss [±5%]

455.10 with VAT / pcs + price for transport

370.00 ZŁ net + 23% VAT / pcs

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SM 32x150 [2xM8] / N42 - magnetic separator
Specification/characteristics SM 32x150 [2xM8] / N42 - magnetic separator
properties
values
Cat. no.
130297
GTIN
5906301812906
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
32 mm [±1 mm]
Height
150 mm [±1 mm]
Weight
804 g
Material Type
Stainless steel AISI 304 / A2
Magnetic Flux
~ 8 000 Gauss [±5%]
Size/Mount Quantity
2xM8
Polarity
circumferential - 5 poles
Casing Tube Thickness
1 mm
Manufacturing Tolerance
±1 mm

Magnetic properties of material N42

properties
values
units
remenance Br [Min. - Max.] ?
12.9-13.2
kGs
remenance Br [Min. - Max.] ?
1290-1320
T
coercivity bHc ?
10.8-12.0
kOe
coercivity bHc ?
860-955
kA/m
actual internal force iHc
≥ 12
kOe
actual internal force iHc
≥ 955
kA/m
energy density [Min. - Max.] ?
40-42
BH max MGOe
energy density [Min. - Max.] ?
318-334
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 mounted in chutes, hoppers, and pipelines to protect production machines from failure. Thanks to the use of strong neodymium magnets, the rod catches even metallic dust.
The construction relies on a sealed, welded stainless steel housing, polished smooth. 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.
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. For easier operation, it is worth considering ordering a rod in a version with a cleaning sleeve.
Magnetic induction measured in Gauss (Gs) determines the density of magnetic flux on the rod surface. The economical version (8kGs) handles large pieces of metal perfectly. 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.

Strengths as well as weaknesses of NdFeB magnets.

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:

  • They have constant strength, and over more than ten years their attraction force decreases symbolically – ~1% (in testing),
  • Magnets very well defend themselves against demagnetization caused by foreign field sources,
  • By covering with a reflective layer of gold, the element presents an professional look,
  • Magnets are distinguished by excellent magnetic induction on the surface,
  • 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 flexible molding and adaptation to individualized solutions, NdFeB magnets can be produced in a wide range of geometric configurations, which amplifies use scope,
  • Versatile presence in electronics industry – they find application in magnetic memories, electromotive mechanisms, medical equipment, and industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which makes them useful in miniature devices

What to avoid - cons of neodymium magnets: tips and applications.

  • At strong impacts they can crack, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
  • They rust in a humid environment. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
  • We suggest cover - magnetic mount, due to difficulties in realizing threads inside the magnet and complicated forms.
  • Possible danger related to microscopic parts of magnets can be dangerous, in case of ingestion, which gains importance in the aspect of protecting the youngest. Furthermore, tiny parts of these products can disrupt the diagnostic process medical after entering the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Detachment force of the magnet in optimal conditionswhat contributes to it?

Holding force of 0 kg is a theoretical maximum value conducted under standard conditions:

  • with the contact of a sheet made of special test steel, guaranteeing maximum field concentration
  • possessing a massiveness of at least 10 mm to avoid saturation
  • characterized by lack of roughness
  • with zero gap (no coatings)
  • under axial force vector (90-degree angle)
  • at standard ambient temperature

Lifting capacity in real conditions – factors

Real force is influenced by working environment parameters, such as (from priority):

  • Space between magnet and steel – every millimeter of distance (caused e.g. by veneer or dirt) significantly weakens the pulling force, often by half at just 0.5 mm.
  • Force direction – remember that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the maximum value.
  • Element thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
  • Material type – ideal substrate is high-permeability steel. Cast iron may generate lower lifting capacity.
  • Surface finish – full contact is obtained only on smooth steel. Any scratches and bumps create air cushions, reducing force.
  • Temperature – temperature increase causes a temporary drop of induction. It is worth remembering the maximum operating temperature for a given model.

* Holding force was tested on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under attempts to slide the magnet the load capacity is reduced by as much as 75%. Additionally, even a small distance {between} the magnet’s surface and the plate lowers the lifting capacity.

Safe handling of neodymium magnets

Pacemakers

Warning for patients: Powerful magnets disrupt electronics. Keep minimum 30 cm distance or request help to work with the magnets.

Shattering risk

Protect your eyes. Magnets can explode upon violent connection, ejecting sharp fragments into the air. Wear goggles.

Precision electronics

GPS units and smartphones are highly susceptible to magnetism. Direct contact with a strong magnet can decalibrate the sensors in your phone.

Do not drill into magnets

Mechanical processing of NdFeB material poses a fire risk. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.

Powerful field

Before use, read the rules. Uncontrolled attraction can destroy the magnet or hurt your hand. Be predictive.

This is not a toy

NdFeB magnets are not intended for children. Swallowing multiple magnets may result in them connecting inside the digestive tract, which poses a direct threat to life and necessitates urgent medical intervention.

Thermal limits

Watch the temperature. Heating the magnet above 80 degrees Celsius will permanently weaken its properties and strength.

Magnetic media

Powerful magnetic fields can erase data on credit cards, hard drives, and storage devices. Stay away of min. 10 cm.

Nickel coating and allergies

Some people suffer from a contact allergy to Ni, which is the common plating for neodymium magnets. Extended handling may cause skin redness. It is best to wear protective gloves.

Physical harm

Watch your fingers. Two large magnets will snap together immediately with a force of several hundred kilograms, crushing everything in their path. Exercise extreme caution!

Important!

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